JP2000215218A - Vibration analysis aiding system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system capable of efficiently leading out optimum design information capable of realizing objective seismic resistance in the case of analyzing the vibration of an installed structure such as an installed instrument rack. SOLUTION: The system provided with a data base related to the characteristics of members to be used defines an analytical model in a two- dimensional(2D) model obtained by dividing a structure by plural cross-sections by using a GUI function, transfers the defined model to a vibration analytical system 2 and receives an analytical result from the system 2. The system selects an optimum member to be used by automatically transmitting/receiving information to/from the system 2 by utilizing the data base. The system can easily prepare also a drawing of a real shape by automatically transferring the obtained optimum design information to a three-dimensional(3D) CAD system.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration analysis support system for transferring information to a vibration analysis system in manufacturing and designing a structure to improve work efficiency.

[0002]

2. Description of the Related Art Conventionally, as a stationary structure such as an instrument panel or an instrumentation rack installed in a plant, the depth of which is smaller than the height or width, for example, an angle (L-shaped member) or a channel (groove). A frame composed of a plurality of linear structural members such as shaped members) or boxes (box-shaped members), various instruments serving as rigid elements, and plates such as top plates and side plates serving as plate members Attach the shape member as needed,
There is known a configuration in which a fixing portion is connected to a mounting portion or an installation surface thereof by a connecting member such as a bolt.
Usually, in the manufacturing process, the type and number of instruments to be installed, the mounting position, the outer shape of the frame, etc. are various. After selecting a standard and performing a detailed design, we assemble each member and deliver the product to the customer.

Among such structures, for example, control panels such as a radiation monitoring panel, a nuclear instrumentation panel, a process instrumentation control panel, or an instrumentation rack used in a nuclear power plant, or an instrumentation rack are particularly strictly thorough. Because of the demand for seismic resistance, the factory is usually subjected to a vibration test at the time of factory shipment prior to delivery, and its natural vibration value is measured to confirm the seismic resistance. If it is found from the vibration test that the seismic resistance of the product does not satisfy the customer's requirements, it is necessary to review and change the design, such as a change in the member used, and to restart the production.

Therefore, in order to eliminate such waste of work and time and to improve efficiency, a finite element model is first constructed for a structure based on design information in a design stage before manufacturing, and an optimal finite element model is constructed using the model. The selection of structural members and coupling members and vibration analysis (natural frequency analysis, frequency response analysis, time history response analysis, static analysis, etc.) have been performed, and the natural vibration numerical values have been predicted. Furthermore, after confirming the earthquake resistance in advance in this way, the design information obtained by the analysis is manually applied to the three-dimensional CAD (Compute
(r Aided Design) system to create a three-dimensional real design model and then enter the actual manufacturing stage.

As described above, for the vibration analysis performed in the design stage, it is necessary to construct a finite element model in advance and to select an optimum use member for realizing the target earthquake resistance. Become. Conventionally, these operations are performed by manual data input to a computer for each individual structure. The specific contents of these input operations will be described below by taking the stationary type structure such as the above-mentioned board or rack as an example.

That is, a structure such as a control panel or an instrumentation rack has a structure in which various instruments as rigid elements are mounted in various arrangements on a framework made of structural members. In the installation, the bottom surface and the back surface of the structure main body are fixed to the floor surface or the wall surface of the plant with a connecting member. There are various ways of fixing. As described above, it is very difficult to divide a real shape model into finite elements for each of various structures having various numbers, sizes, and arrangements of constituent elements.

Therefore, in the case of a structure (hereinafter simply referred to as a structure) such as the control panel or the instrumentation rack, one of the structural members such as an angle constituting the framework is replaced with one beam (rod). In addition to simulating with the above, a bolt as a coupling member is simulated with a spring, the beam is given material properties (cross-sectional shape, second moment of area, shear constant, etc.), and the beam is divided at certain intervals (nodes are set). ) To build a finite element model.

[0008] As a concrete construction procedure, first, each member to be used such as a structural member such as an angle, an instrument, a plate-like member for attaching the instrument, and bolts as connecting means thereof are modeled. There is a need. In modeling, cross-sectional property data and material property data of structural members, thickness data of plate members, instrument data (height, width, depth, center of gravity position, weight, bolt fixing position, etc. for each instrument to be attached) ) And spring characteristic data of a spring simulating a bolt (spring constant for each bolt; three translation spring constants and three rotation spring constants) are preset as parameters. Thereafter, individual inputs are manually performed in the following procedures (a) to (d), and a finite element model is constructed.

(A) Setting of a structural member to be a framework of the main body A point (node) to be connected to the structural member is directly created in three-dimensional space coordinates, and the structural member is set between the nodes. . For each of the set structural members, the cross-sectional shape, material, material properties, and the like are defined. In the case where the structural member has directionality in the cross-sectional shape such as a non-equilateral angle, the installation orientation angle at the time of installation is represented by a numerical value to be distinguished.

(B) Setting of a plate-shaped member to be attached to the main body When a plate-shaped member is mounted on a structural member, a node is created at the mounting position, and the material and thickness of the plate-shaped member are set at the node. Is defined.

(C) Setting of an instrument to be attached to the main body For each instrument to be attached, a rigid element having the dimensions is created, and then the center of gravity, the total weight, and the instrument are fixed to the structural element. Defines spring elements and installation positions (three-dimensional) of springs that simulate bolts for use.

(D) Setting conditions for fixing the main body to the floor or wall A node is created at a position where the main body fixing bolt is installed on the structural member, and a spring for simulating the main body fixing bolt is formed at the node. Define the spring element.

A finite element model is constructed according to the above procedures (a) to (d), and an optimum member to be used is selected in the following procedure (e).

(E) Selection of Optimum Member for Use First, a member of a standard or a material which is considered appropriate for a target natural vibration value is temporarily selected, and the above members (a) to (d) are selected. The setting shown in (1) is performed manually to create a finite element model, and then a natural frequency analysis is performed. When there is a difference between the analysis result and the target natural frequency, a member considered to be the next best is selected, and the settings shown in (a) to (d) are manually performed again. The following finite element model is created by performing the work, and a natural frequency analysis is performed on the model, and a comparison with the target value is performed again. Until an analysis result sufficiently close to the target natural vibration numerical value is obtained, an optimal member to be used is selected only by repeatedly performing this series of operations.

After the construction of the finite element model and the optimization of the members to be used are completed by the above procedures (a) to (e), a three-dimensional actual design model (three-dimensional CAD) is produced by the following procedure (f).
Model) is created.

(F) Creation of a three-dimensional real shape model The optimal design information (design dimensions, structural member shapes, instrument arrangement positions, fixed positions, etc.) obtained by vibration analysis performed by constructing a finite element model is 3D CAD by hand
The system is input to the system to create three-dimensional part drawings, and after assembling them (assembly), interference checking between parts is performed to complete a three-dimensional actual shape drawing.

In the manufacture of the structure, after going through each of the steps (a) to (f), an actual manufacturing step is started. By doing so, it is possible to prevent a situation in which it is found after manufacture that the earthquake resistance does not satisfy the customer's requirements, and it is possible to efficiently manufacture and deliver various structures that satisfy various customer's requirements.

[0018]

However, at present, each of the above-mentioned conventional procedures has the following disadvantages.

First, in the construction of the finite element model, since all the settings are performed by manually inputting parameters, there is a problem that it takes a very long time to construct the model. Specifically, each of the nodes created at the attachment position of the connection point of the structural member or the plate-like member,
It must be created directly and sequentially in the three-dimensional space, and each structural member must be set between nodes. Therefore, when the structure of the main body is complicated,
Recognition of the context of nodes became difficult, setting and debugging took a lot of time, and there was a problem that errors were easy to occur.

Further, the structural members of the analysis model are not displayed as they are in the actual cross-sectional shape, but are simulated by a single line (beam). Even for a certain structural member, its installation angle can be confirmed only by numerical values. For this reason, there is a problem in that it is difficult to recognize and a setting error easily occurs.

Further, in selecting the optimum use member, it is necessary to select the use member again and perform the analysis repeatedly until the target natural frequency is approached. The work of selecting the use member is performed by the operator. There was a problem that relying on intuition and experience was very large. In addition, the characteristic information that can be reselected to improve the natural frequency includes the cross-sectional shape type and dimensional standard of the structural member, the type of the coupling member for attaching the rigid element to the structural member, and the plate shape. There are many factors such as the thickness of the member, the type of connecting member for fixing to the installation surface of the structure, and the mounting pitch. Each time, the parameters that are the characteristic data of the member to be optimized are manually changed. Therefore, there is a problem that it takes much time and effort.

In creating a three-dimensional real shape model,
Since it is necessary to manually input the optimal design information obtained as a result of the analysis into the three-dimensional CAD system, it takes time and effort to create the information. Also, it was difficult to create an actual shape model including the shape of the engagement of the angle joint.

The present invention has been made in order to solve various difficulties associated with the above-described conventional vibration analysis, and achieves a target earthquake resistance in a vibration analysis of a structure such as a control panel or an instrumentation rack. It is an object of the present invention to provide a vibration analysis support system that can efficiently derive possible optimal design information and that can efficiently create a three-dimensional real shape model from the analysis result.

[0024]

A vibration analysis support system according to the present invention provides a three-dimensional analysis model for structural vibration analysis.
After defining a two-dimensional analysis model that is easy to set up and converting it into an electronic computer, the optimal design information can be obtained by automatically transferring information to and from the vibration analysis system without manual work. It is intended to be obtained efficiently. Furthermore, by extracting the actual shape from the obtained optimal design information and transferring it to the three-dimensional CAD system, a three-dimensional actual shape model can be efficiently created.

FIG. 1 is a block diagram showing the configuration of a vibration analysis support system according to the present invention. The present system 1 can be easily constructed by one computer which can be connected to the vibration analysis system 2 or the three-dimensional CAD system 3. Note that the vibration analysis system 2 constructs a finite element model from the input three-dimensional analysis model information and performs natural frequency analysis. The three-dimensional CAD system 3 creates three-dimensional part drawings from the input three-dimensional analysis model information, and after assembling them, performs interference check between parts to complete a three-dimensional real shape drawing.

As shown in FIG. 1, the present system includes input means 11 such as a keyboard and a mouse for inputting numerical values of design dimensions (height, width, and depth) of a structure and selecting and specifying data. A display screen 12 such as a CRT for displaying the contents of information using a GUI (Graphical User Interface) function, and characteristic data storage means 13 in which characteristic data of usable members or elements are registered in advance in master form.
An analysis model definition subsystem 14 that defines a two-dimensional analysis model based on a sectional view obtained by dividing a structure into a plurality of planes based on input design information, and then combines the two-dimensional analysis models into a three-dimensional analysis model. Analysis information management means 15 for delivering the input design information to the analysis model definition subsystem 14, receiving the three-dimensional analysis model information and delivering it to the vibration analysis system 2, and receiving an analysis result from the vibration analysis system 2. It is determined whether the analysis result received by the analysis information management means 15 satisfies a preset condition, and when it is determined that the analysis result is satisfied, a calculation end is instructed, and the three-dimensional analysis model information at that time is output as optimal design information. Analysis result judging means 16 which performs optimal structural members and coupling members which provide a target analysis result when it is determined that they are not satisfied. Installation method, and the optimizing subsystem 17 for outputting the optimal design information by performing the selection in the order of the thickness of the plate elements are provided.

That is, the main features of the vibration analysis support system of the present invention are, as described in claim 1, a structural member constituting a framework, a rigid element coupled to the framework, and a coupling element. Constructs a three-dimensional analysis model based on input design information for a stationary structure mainly composed of members and performs calculations by passing information to and from a vibration analysis system to optimize the vibration characteristics of the structure. A vibration analysis support system for outputting optimal design information to be converted, comprising: an input unit for inputting information; a display screen for displaying information; and a structural member, the rigid body element, the coupling member, and a frame. A characteristic data storage unit in which a table A in which characteristic data of a plurality of candidate members usable as plate members to be used are stored for each type of member or element and for each candidate is prepared in advance; After building a two-dimensional model in accordance with a predetermined procedure from the information, from table A reads the characteristic data defining a two-dimensional analytical model in accordance with the designation,
An analysis model definition subsystem that performs an operation to convert the analysis model into a three-dimensional analysis model; a table B that stores analysis model information of the three-dimensional analysis model for each model; and a table C that stores analysis results of vibration analysis for each model. And a table X for storing optimal design information obtained as a result of the operation are prepared in advance, and the input design information is transferred to the analysis model definition subsystem to construct a three-dimensional analysis model. The three-dimensional analysis model information is received and stored in the table B, and the three-dimensional analysis model information is transferred to the vibration analysis system so that the analysis is performed in accordance with a predetermined procedure. The analysis information management means to store the analysis result in the table C and the analysis result from the table C when the analysis result is stored in the table C Compared with a preset target value reads, to determine whether or not the condition that has been set in advance,
Analysis result determination means for instructing the end of the operation when it is determined to be satisfied and storing the three-dimensional analysis model information read out from the table B as optimal design information in the table X, and instructing to continue the operation when the determination is negative, When continuation is instructed, the type of the member to be optimized and the type of the characteristic are specified, and the characteristic data read from Table A and the three-dimensional analysis model information based on the initial design information read from Table B are specified in accordance with the specification. Based on, based on a predetermined procedure to perform information exchange with the vibration analysis system, determine whether or not the result satisfies a preset condition, and when it is determined that optimization is completed, instruct the calculation end A member optimizing subsystem for storing the three-dimensional analysis model information in a table X as optimal design information and instructing to continue the operation when it is determined that the three-dimensional analysis model information is not valid It is characterized in.

Hereinafter, the features of the vibration analysis support system of the present invention will be described in detail in the order of the analysis model definition subsystem, the optimization subsystem, and the CAD connection means.

First, the analysis model definition subsystem according to the present invention, based on the input design information, converts the three-dimensional model of the structure into a vertical plane parallel to the bottom surface and parallel to each other based on the input design information. A cross-section set A is created by dividing by a plurality of plane sets A, and is divided by a plurality of plane sets B perpendicular to the bottom surface and parallel to each other and orthogonal to the plane set A. A set B is created to construct a two-dimensional model of the structure, a member or element candidate to be used for the constructed two-dimensional model is specified according to a predetermined procedure, and a two-dimensional analysis model is defined. It is characterized in that a three-dimensional analysis model is constructed by performing a combination operation on the set A of the cross-sectional view and the set B of the cross-sectional view and converting the set into a three-dimensional analysis model.

[0030] The system further includes claims 18 and 1
As described in 9, it is possible to further include a CAD system connecting means 18 for inputting the optimum design information output as a result of the calculation by the above means, performing a predetermined calculation, and transferring the result to the CAD system.

When constructing or defining the analysis model, the characteristic data registered in advance in the characteristic data storage means 12 are sequentially read out and displayed in a list on a display screen, and the input means 11 such as a mouse or a pointing device is used from the list. , Select and specify setting information.

That is, in the vibration analysis support system according to the present invention, the analysis model definition subsystem, as described in claim 3, compares each sectional view of the set A and the set B with respect to the constructed two-dimensional model. Displayed on the display screen according to the designation of each figure, and according to the designation of the type of the member or element in the displayed sectional view, the characteristic data of a plurality of corresponding member candidates are read out from the table A and displayed. A further feature is that a two-dimensional analysis model is defined by displaying a list on a screen and selecting and specifying a member or an element to be used from the list.

FIGS. 2 and 3 are diagrams schematically showing a method of assigning numbers to structural members and a method of dividing a section performed in the analysis model definition subsystem of the present invention. These figures show that the plane set A and the plane set B include at least a front view and a right or left side view of the structure.
Hereinafter, the present invention will be described by taking as an example a case where a target structure is located in a first quadrant of a three-dimensional coordinate system as shown in FIGS. In FIG. 2, each of the structural members serving as the outer frames of the structure is defined by frame numbers 1 to 12.
FIG. 3 shows a state in which section numbers 0, 1, and 2 are assigned to sections obtained by division from the front and the side, respectively. Each cross-section only needs to include at least one node at which a member or an element is set, and it is not necessary that they are equally spaced. A three-dimensional structure is converted into a two-dimensional model by selecting and designating structural members, plate members, and attached instruments from a list of display screens for each section set in this manner. .

FIG. 4 is a diagram schematically showing how the installation angles of the structural members such as unequal angles are expressed in each set cross section. In the figure,
The upper surface and the left side surface of the structure are unfolded by the third trigonometry, and the state when viewed from the front is expressed as the installation angle of the structural member on each surface. For example, the unequal side angle 41 indicated by a bold line in the drawing is confirmed as 42 on the setting screen. As described above, in the present invention, since the difference in the installation angle is also included in the characteristic data of the structural member and visually expressed as the difference in the cross-section angle and displayed on the screen, the difference in the installation angle is analyzed while being checked on the screen. A model can be defined.

In the present invention, since the three-dimensional model is divided into sections in this way and converted into a two-dimensional model, and an analysis model is sequentially constructed on this two-dimensional setting screen,
Even for a complicated model, the positional relationship between the structural materials can be easily grasped, and an analysis model can be created in a short time and easily.
The installation angle of the structural member also converts the three-dimensional model into two dimensions by developing the top and side surfaces of the structure to the front. By displaying the cross-sectional direction of the structural member in the two-dimensional cross-section, the cross-sectional direction can be visually confirmed, and the accuracy of model creation is improved compared to the conventional numerical confirmation.

In the present invention, as the characteristic data stored in the characteristic data storage means 12, as described in claim 5, the cross-sectional characteristic data of the structural member candidate and the material of the structural member candidate The characteristic data, the installation angle information of the structural member candidate, the spring element data of the spring in which the coupling member candidate is simulated, the installation pitch data of the coupling member candidate, and the plate thickness data of the plate-shaped member are included. In. Specifically, the material property data of the structural member includes Young's modulus, Poisson's ratio, material density, and the like, and the cross-sectional property data also includes a sectional shape, a sectional area, a second moment of area, a torsional constant, a shear constant, and the like. .

As described above, in the analysis model definition subsystem of the present invention, the characteristic data of the structural members necessary for constructing the analysis model, the meter data, the bolts used for mounting the meter and installing the main body, etc. The joining member data and the plate thickness data of the plate member are all registered in the master in advance, and this data is selected while visually confirming on a two-dimensional setting screen for each section obtained by division. Since it is configured to be specified, it is easy to grasp the relationship between the members, and the possibility of setting errors is small.
Therefore, even for a structure having a complicated structure to which different design information is given each time, an accurate analysis model can be easily constructed for each structure.

Next, the optimization subsystem according to the present invention will be described.

In the vibration analysis support system according to the present invention, the optimization subsystem has the configuration described in claim 6, and the optimization proceeds in the order described in claim 7.

In the optimization subsystem of the present invention, when selecting the optimum sectional shape type of the structural member,
As described in claim 8, the same material as the structural member in the initial design information and having the same weight per unit length is used as a reference for extracting a member to be optimized. Then, the section characteristics of the structural member to be optimized are replaced with them, and the natural frequency analysis of the three-dimensional analysis model for each cross-sectional shape type is performed. Selected as a type.

After the optimum cross-sectional shape type is selected in this manner, when selecting the optimum dimensional standard of the structural member according to the ninth aspect, as described in the tenth aspect, the structural member candidate The I / A (where I is the second moment of area, A is the cross-sectional area), which is a value unique to the cross-section, is added as a parameter to the cross-section characteristic data of (1), and is used as a reference for extracting candidate members. Similarly, in selecting the optimum material of the structural member according to the eleventh aspect, as described in the twelfth aspect, the material characteristic data of the structural member candidate is E / ρ (however, a material-specific value). E is the modulus of longitudinal elasticity, ρ is the material density) as parameters, and is used as a reference for extracting candidate members. Further, in selecting the optimum standard of the joining member according to the thirteenth aspect, the characteristic data of the joining member candidate includes a parameter 2π (n · k _H / M) ^1/2 which is a value unique to the joining member. n is the number of coupling members, k _H is the spring constant in the translation direction, and M is the total weight of the structure.
Is used as a criterion for extracting candidate members.

In the present invention, the reason why the above specific values are introduced as a part of the characteristic data will be described below in connection with the case of selecting the optimum dimensional standard of the structural member. First, when analyzing the natural frequency of the structural member,
As shown in FIG. 5, if a structural member is simulated by a single beam 51 having a cross-sectional area A having one end fixed and a length L, its natural frequency f can be expressed by the following equation 1. it can.

[0043]

(Equation 1) (Where f is the natural frequency (Hz), L is the beam length, λ is the frequency coefficient, E is the longitudinal modulus, I is the second moment of area, G is the gravitational acceleration, A is the cross-sectional area, and ρ is As can be understood from Equation 1, the components contributed by the cross-sectional shape at the natural frequency are the second moment of area I and the cross-sectional area A, and the natural frequency is the ratio I / A of these. of
Since it can be said that the I / A is proportional to the 1/2 power, the present invention registers this I / A as a section-specific value in the section characteristic data, and uses this data to select the optimal dimensional standard for the structural member. Is performed.

The selection procedure is as follows. First, a target natural vibration numerical value is set for an analysis model created by the analysis model definition subsystem, and structural members having the same cross-sectional shape to be optimized are displayed. Specify for each section displayed on the screen. Then, a range to be optimized is designated from among the dimension standards of the structural members registered in the master, and a dimension standard having a plurality of N cross-section-specific values is extracted from the range. At the time of extraction, it is necessary to include at least two types of dimensional specifications having the maximum and minimum values specific to the cross section in the range. Extract more than one kind of dimensional standard. A dimension standard having a value in between can be easily set as a point at which the range to be optimized is divided. For example, when the number of divisions in the range is designated as 2, three dimensional specifications having the section-specific values of the maximum value, the minimum value, and the intermediate value are extracted.

Next, the structural members of the analysis model to be optimized are replaced with the selected members of the N dimension standards, and the natural frequency analysis is executed for each of the obtained analysis models. Based on the analysis result, a Ghufu representing the relationship between the section-specific value I / A and the natural frequency f is created by a polynomial function, and from this equation, the section-specific value giving the target natural vibration value as a function value Is obtained. Then, a dimensional standard having a value specific to the cross section closest to this value is selected, and a structural member having the dimensional standard is set as an optimal standard material.

FIG. 6 shows that the number of divisions is three, and
Point, the sampling number of data is four (N = 4), i.e. the minimum value x _1, intermediate value x _2, the intermediate value x _3, shows an example of the graph when the maximum x _4. If the number of samplings is four, the polynomial created is a cubic function f (x)
= Ax ³ + bx ² + cx + d.
Theoretically it is possible to determine the cross-section-specific values x _x accurately interpolation point higher the sampling number, but it is not practical to labor and time are often too since it much more according as the operation The sampling number is preferably 3 or more. The target natural vibration value is represented by f ( _xx ),
dimensional specifications with x ₀ sufficiently close to x _x as section-specific value is selected as the optimum dimensional specifications.

Note that the optimum candidate selecting means reads out the analysis result stored in the table C, and the conditions for determining whether the analysis result satisfies a preset condition include a target natural frequency and a target natural frequency. The difference from the analysis value is smaller than the target error. The target error can be set arbitrarily.

In the present invention, as is apparent from claims 11 and 12, when the optimum material for the structural member is selected, the value E / ρ (where E is the longitudinal elastic modulus and ρ is the material density) is used. The reason for the introduction is the same as in the case of the value specific to the cross section. FIG. 7 shows the natural frequency and the material-specific value E of the structural member.
/ Ρ is shown.

Next, the selection of the optimum standard for the connecting member according to the thirteenth aspect will be described. In the present invention, FIG.
As shown in FIG. 2, a coupling member such as a bolt 81 used for fixing a structure to an installation surface (floor surface or wall surface) has a spring fixed at one end and having a weight 82 at the other end. If simulated by 83, the natural frequency f can be expressed by the following equation (2).

[0050]

(Equation 2) (However, f represents the natural frequency (Hz), m represents the weight of the weight, and k represents the spring constant.) Therefore, when a structure having a total weight of M is fixed to the installation surface with n bolts, , Weight per bolt m
Is represented by M / n, and its natural frequency f can be approximated by the following equation (3).

[0051]

(Equation 3) (Where f is the natural frequency (Hz), M is the total weight of the structure, n
Is the number of bolts, and k _H is the translational spring constant. In Equation 3, the part determined by the bolt is the number of bolts n and the translational spring constant k _H , and the natural frequency is 2π (n ·
k _H / M) ^1/2, and the present invention provides this 2π (n · k _H /
M) ^1/2 is registered in the cross-sectional characteristic data as a spring-specific value as a value unique to the spring, and the optimum dimensional standard of the structural member is selected using this data.

The selection procedure is as follows. First, a target natural vibration numerical value is set for the analysis model created by the analysis model definition subsystem, and the installation pattern (fixed portion) of the structural member is specified. , i.e. on that the variable k _H and the n in number 3 constant, to extract the coupling member candidates to be optimized from the characteristics data of the coupling member being a master register. The extraction procedure and the procedure for obtaining the interpolation point and selecting the optimum standard are the same as those for the structural member.

FIG. 9 shows the relationship between the natural frequency of the coupling member and the value 2π (n · k _H / M) ^1/2 specific to the spring. FIG. 10 shows an example of an installation pattern of the connecting member on the bottom surface of the structure. In FIG. 10, B ₁ , B ₂ , B ₃ .
₁₂ 12 volt is two B ₁ and B ₂ at the center in the depth direction, five on each laterally back and forth two rows total ten is disposed in the depth direction B ₁ of the B ₂ of 2 The position shows an example of a fixed installation pattern.

Next, the selection of the optimum installation pitch of the coupling member according to the fifteenth aspect will be described. The optimum installation pitch is to select the optimum installation pitch for the coupling member having the k _H selected as described above. Here, the installation pitch indicates a distance L / 4 between bolts in the case of FIG. 10 as an example.

The selection procedure is as follows. First, a target natural vibration numerical value is set for the analysis model created by the analysis model definition subsystem, a coupling member to be adopted is specified, and the minimum value of the installation pitch and the optimum value are determined. By setting the number of divisions of the pitch range to be optimized, the installation pitch range and the intermediate point to be optimized are set.

FIG. 11 is a graph showing the relationship between the installation pitch and the natural frequency. In FIG. 11, the number of divisions is 3, the number of samplings is 4, and the maximum installation pitch x ₁ ,
A graph for an intermediate value x ₂ , an intermediate value x ₃ , and a minimum value x ₄ is shown as an example. The maximum value x ₁ of the installation pitch,
The pitch distance is determined by the positions of the four corners of the mounting surface of the structure. In the case of FIG. 10, the division number is 4, the maximum value of the installation pitch corresponds to the distance L between B ₃ and B _7. Hereinafter, the procedure for selecting the optimum installation pitch is the same as that for the structural member.

As described above, according to the optimization system of the present invention, by specifying the type of the optimization target member and the optimization range, and setting the target natural vibration numerical value and the like, the natural frequency and the cross section specific Since the relational expression of the value (or material-specific value, spring-specific value, etc.) is automatically created,
The time required for the designer to study the parameters of the analysis model by trial and error is greatly reduced, and the optimization can be performed quickly and easily.

The selection of the optimum thickness of the plate-like member according to the sixteenth aspect is the same as that of the structural member, and the description thereof is omitted. FIG. 12 shows the relationship between the plate thickness and the natural frequency.

The optimizing system according to the present invention is characterized in that, according to the specification of the type of the member to be optimized or the type of the characteristic, the characteristic data of a plurality of candidate members corresponding from the table A are specified. Is read out, a list is displayed on the display screen, and a candidate for optimization is selected and designated from the list. Thereby, optimization of data designation while visually confirming can be mainly performed without complicated parameter input.

Next, the CAD system connection means will be described. A first CA according to the present invention according to claim 18.
In the D system connection means, a combination possible pattern of a section number and an arrangement order number created on each section and automatically assigned to each structural member when constructing a three-dimensional analysis model; From the cross-sectional shape data and the mounting angle data, the actual shape of the meshing portion of the joint between the structural members is determined, and the actual meshing information is used as characteristic data of each structural member (for example, the mounting angle data, the mounting position data, and the length). 3D CAD system with the mounting plate data and mounting instrument data. 3D CA
In the D system, the three-dimensional CAD
A model is created, and a three-dimensional real shape model is created.

In the second CAD system connecting means according to the nineteenth aspect of the present invention, a meshing shape at a connecting point between structural members is created on each cross section when constructing a three-dimensional analysis model. It has a section number and an arrangement order number automatically assigned to each structural member, a combination of the number of structural member connections, structural member installation angle data, and actual shape information stored in advance in characteristic data storage means. Indexing from the standard model, this indexed meshing actual shape information and characteristic data of the structural member of the analysis model (for example, mounting position data, length data, etc.), plate-like member data such as side plates, instrument mounting data, By combining this with the installation data of the connecting members, the three-dimensional actual shape information of the analysis model is obtained, and this information is automatically transferred to the three-dimensional CAD system. To create the original actual design drawings.

According to the present system having such a CAD system connection means, a three-dimensional real shape model is automatically created from a vibration analysis model (CAE model).
The CAD work that the designer had done so far has been omitted,
Significant reduction in design man-hours.

[0063]

FIG. 1 is a block diagram showing the configuration of a vibration analysis support system according to the present invention, and FIG. 13 is a flowchart showing the flow of the entire arithmetic processing of the vibration analysis support system according to the present invention. This system 1 is a system that can be connected to a vibration analysis system 2 or a three-dimensional CAD system 3.
It can be easily constructed with a single computer.

(1) First, based on FIG. 1 and FIG.
An outline of an embodiment of the present invention will be described. In this system, first, design dimensions (height, width, depth) of a structure are input from input means 11 such as a keyboard. Next, in the analysis model definition subsystem 14, a three-dimensional model of the structure based on the design dimensions is divided into a plurality of planes to create a plurality of sectional views, and the sectional views are called on a display screen. Computer GUI (Graphical User In
Using the (terface) function, the contents of the characteristic data of the usable members or elements registered in advance in the characteristic data storage means 13 in advance are sequentially read and displayed on the display screen 12, and the data selection / selection on the screen is performed. By specifying, a two-dimensional analysis model is defined. Then, it is converted into a three-dimensional analysis model in the computer.

The analysis model information of the three-dimensional analysis model created in the analysis model definition subsystem 14 in this manner is stored in the table B prepared in the analysis information management means 15 in advance. When the analysis start command is input from the input unit 11, the analysis information management unit 15 delivers the three-dimensional analysis model information to the vibration analysis system 2 according to a predetermined procedure.

The vibration analysis system 2 creates a finite element model based on the received three-dimensional analysis model information, and executes a natural vibration analysis. Then, the analysis result is delivered to the analysis information management means 15 of the vibration analysis support system 1 of the present invention, and the delivered analysis result is stored in the table C. The analysis result determination means 16 issues a command to terminate the calculation when it determines that the analysis result read from the table C satisfies a preset condition, for example, a condition that the natural vibration numerical value is 20 Hz or more. The model information is stored in the table X as optimal design information.

When it is determined that the analysis result read from the table C does not satisfy the condition, the optimizing subsystem 17 is instructed to continue the operation. In the optimization subsystem 17, the optimal structural member, the coupling member, the installation method, and the thickness of the plate element that provide the target natural vibration value are selected in this order.

Input / output information, contents and results of calculations, data read from the table, and the like can be displayed on a display screen 12 such as a CRT as needed. Note that a table X is provided between the present system 1 and the three-dimensional CAD system 3.
Read out the optimal design information from the
By providing the CAD system connection means 18 for delivering the system, the optimal design information can be directly delivered to the three-dimensional CAD system 3, and the three-dimensional real shape model is efficiently created by the CAD system 3.

(2) Next, an embodiment of model construction in the analysis model definition subsystem of the present invention will be described. First, a structure to be analyzed is converted into a two-dimensional model according to the procedures shown in FIGS. FIG. 14 shows an example of a setting screen for a two-dimensional model. On each two-dimensional setting screen obtained by dividing the analysis target model for each section, design information of the structure (design dimensions, selection of cross-sectional characteristics of structural members and setting of installation angles, setting of instruments, setting of installation conditions) Enter The two-dimensional information input using the GUI function is converted into three-dimensional information by calculation in the system, and a three-dimensional analysis model is created.

This analysis model information is converted into a finite element model in the vibration analysis system, a natural frequency analysis is performed, and if the result satisfies the target condition of, for example, 20 Hz or more, the analysis is terminated and the input is completed. The design information is output as the optimal design information. If the analysis result does not satisfy the target condition, the analysis will be continued, but the optimization of the used members performed in that case will be described later.

The procedure for constructing an analysis model will be described below, taking as an example the case where an angle material is selected as a structural member to form an instrumentation rack as a structure. The dimensions (width, depth, height) of the rack are input on the panel 141 of the data input screen shown in FIG. 14, and the outer frame angle is set in a three-dimensional coordinate system. Beam numbers are assigned to the outer frame angles according to the procedure shown in FIG. By inputting this number, an individual structural member is specified, and cross-sectional characteristic data, installation angle, and material characteristic data are set for the specified structural member.

First, as for the cross-sectional characteristic data, by specifying a predetermined position of the panel by, for example, clicking a mouse, the cross-sectional characteristic data 142 registered as a master is displayed, and a member to be set is selected from the data. And specify. As for the direction of the angle material, that is, the installation angle, the cross-sectional direction viewed from the front with the upper surface and the side surface of the rack expanded to the front as shown in FIG. 4 is displayed at a predetermined position on the panel. Fine adjustment is also possible by changing the direction of the section every 90 degrees or by inputting a numerical value of the angle. Such a difference in the installation angle of the angle can be set while confirming the sectional direction on the display screen.

In setting an unequal side angle material, by providing a reversing key, the long side and the short side of the unequal side are switched by operating the key, and all directions of the unequal side angle are displayed on the display screen. It can be set while checking the cross section direction.

The material property data 143 can be selected and set by the same operation. After all the setting of the outer frame angle is completed in this way, the operation of the enter key advances to the setting of the next internal angle.

FIG. 15 shows an example of a screen for setting an internal angle (in the case of a vertical angle). By specifying where the vertical and horizontal angles are located,
The cross section shown in FIG. 3 is set on the outer frame angle of the rack. By specifying the number of this section, a setting screen for setting an angle material on the section appears. On the setting screen, the distance from the left end of the rack at the installation position of the vertical angle is specified, and the sectional characteristics and the installation angle are selected and specified in the same manner as the outer frame angle, and the vertical angle is sequentially set. The setting of the angles installed in the horizontal direction and the side surface is performed in the same manner as in the case of the vertical angle except that the cross section number is designated and the dimensions from the upper surface of the rack are used as a reference.

By setting the angles in the vertical direction / underwater direction / depth direction, numbers are automatically assigned between the connection points as shown in FIG. 16, and by specifying these numbers, the angles between them are designated. Can be deleted.

When the setting of the structural member is completed in this way, the setting of the plate-like member can be performed. FIG. 17 is an example of a screen for setting a plate-like member created for each section. FIG. 18 shows a coordinate system for setting a plate-like member and a method of specifying coordinate values when deleting a surface, that is, when forming a hole. By specifying each section number for which the angle of the rack has been set, a setting screen shown in FIG. 17 appears. A coordinate system shown in FIG. 18 is set on each side of the rack, and the shape of the hole of the plate-like member formed on each section is two points (X
(1, Y1) and (X2, Y2). Then, a plate-shaped member is created by selecting the master-registered sheet thickness and material data from the menu screen.

Next, an instrument as a rigid element attached to the framework is set. Before specifying the mounting position, modeling of various instruments is performed first. First, instrument modeling will be described.

An instrument attached to each cross-section angle is simulated by a hexahedron shown in FIG. 19, and the position of the center of gravity is represented by a deviation (a, b, c) from the center of the dimension. The sum of the position of the center of gravity, the size of the instrument, and the weight of the instrument is registered as master data as instrument data.

The method of mounting the instrument modeled on the rack in this manner is shown in FIGS.
(D) is divided into four mounting types.

Type A: The supporting angle 201 is connected to the instrument itself 202, and the front plate 203 of the rack and the instrument are connected by a spring element simulating a bolt.

Type B: The instrument is mounted on the support angle, and the front plate 203 of the rack and the instrument are connected by a spring element simulating a bolt.

Type C: The instrument is connected by spring elements simulating two support angles 201 and four fixing bolts 204.

Type D: 2 for one vertical angle 205
The instrument fixing horizontal angles are connected, and the instrument is connected on the horizontal angle with a spring element simulating four instrument fixing bolts.

The method of setting the instrument modeled as described above is performed as follows for each instrument type. First, in the case of types A and B, after indicating the type of the instrument and selecting the applicable instrument from the instrument data registered in the master, the spring constant corresponding to the bolt for fixing the instrument is represented by the spring characteristic data. Choose from Enter the position to attach the instrument (X, Y), the section number of the support angle that supports the instrument, and the beam number of the support angle (number indicating the number of the beam from the top), and fix the front panel and the instrument The instrument is set on the analysis model by designating the bolt position for use. FIG. 21 shows an instrument setting screen. When a plurality of the same instruments are mounted on the same support angle as shown in FIG. 4 (D), a plurality of the same instruments can be simultaneously set by inputting the mounting pitch and the total number of the instruments to be mounted. is there.

Similarly, in the case of types C and D, after specifying the type of the instrument and selecting the applicable instrument from the instrument data registered in the master, the spring constant simulating the bolt for fixing the instrument Is selected from the spring characteristic data.
As shown in the following FIG. 21, the position (X,
The instrument is set on the analysis model by inputting Y) and a section number having a support angle for supporting the instrument. When a plurality of the same instruments are mounted, a plurality of the same instruments can be simultaneously set by inputting the horizontal mounting pitch DX and the total number of horizontal gauges, and the vertical mounting pitch DY and the total number of vertical gauges. Type D
The cross-sectional characteristics of the two horizontal angles for fixing the instrument on the vertical angle are selected from the cross-sectional characteristic data registered in the master, and the setting angles thereof are set in the same manner as the other angles.

By specifying the method of fixing the structure to the installation surface set in this way, the definition of the analysis model is completed. The fixing method is performed by designating which surface (bottom surface or back surface) of the rack to fix on the data input panel shown in FIG. 22, and selecting a bolt fixing coordinate system. The fixed position is on the X axis and Y
A bolt is set by specifying a position on the axis, and a spring constant simulating the bolt is set by selecting from a spring constant registration table with a spring constant selection button.

(3) An embodiment of automatic selection of an optimum material in the optimization subsystem of the present invention will be described.

FIG. 23 is a flow chart showing a method for selecting an optimum cross-sectional shape of a structural member according to claim 8, and FIG.
Is a flowchart showing a method for selecting an optimum dimension standard of a structural member according to claim 9, FIG. 25 is a flowchart showing a method for selecting an optimum material of a structural member according to claim 11, and FIG. 27 is a flowchart showing a method for selecting an optimum standard of a connecting member corresponding to the above, FIG. 27 is a flowchart showing a method for selecting an optimum installation pitch of a connecting member corresponding to a fifteenth embodiment, and FIG.
6 is a flowchart showing a method for selecting an optimum plate thickness of a plate member corresponding to FIG. The procedure for optimizing each member / element described above is as described in the corresponding claim, and the basis of each unique value as a reference for the optimum member has already been mentioned in the section of the means for solving the problem. Already done,
Here, the description is omitted.

In the optimizing subsystem according to the present invention, the replacement of the characteristic data is automatically performed by the processing inside the computer, and the selection procedures are automatically and continuously performed in this order. Can be obtained in a short time. Of course, it is also possible to set so that the end or the continuation of the optimization is selected at the end of each stage. When it is necessary to select and specify data, it is possible to visually confirm from the data displayed on the display screen using the GUI function of the computer as in the case of the analysis model definition subsystem. As a result, the possibility of setting errors is greatly reduced.

(4) C corresponding to claims 18 and 19
An embodiment of automatic development from a three-dimensional analysis model (CAE model) to a three-dimensional real shape model (CAD model) performed by the AD system connecting means will be described below, taking an example in which the angle is a structural member. I do.

The first CAD system connecting means according to claim 18 determines the engaging shape of the angle connecting portion from the combination pattern of the section number, the arrangement order number of the angle, and the number of angle connections, and It is intended to automatically generate a model.

FIG. 29 is a schematic diagram of an example of a structure to be drawn divided by cross sections indicated by front and rear cross-section numbers 0 to 2 and left and right cross-section numbers 0 to 2. In the figure, by setting the following rules based on the section numbers and arrangement order numbers of each angle, the matrix shown in Table 1 below is created. That is, the angle of the section number is the largest and the smallest, and the item of the section number factor is set to 0 (otherwise, 1). For the angles with the maximum and minimum arrangement order numbers, the item of the arrangement order number factor is set to 0 (1 otherwise). When three or more angles are connected at the connection point, the item of the number-of-connections factor is set to 0 (1 otherwise). The side angles shall be processed in principle. The length of both ends of the horizontal angle is, in principle, 2 × L from the analysis model size.
(Angle width). An angle in which the total number of each factor is 2 or more is regarded as having both ends processed.

[0094]

[Table 1] In Table 1, t represents the thickness of the angle.

According to the above rule, as shown in Table 1, in FIG.
91, the total number of factors of the horizontal angle 292 is calculated and becomes 0, and no processing is performed. Since the total number of factors of the horizontal angle 293 at the connection point B is 2,
Both ends are processed. The engagement shape of the joint between the angles is determined from the above rule.

The thus obtained joint shape information and the optimal design information (dimension information, component part arrangement position information, installation angle information, deletion data, section characteristic data, By transferring the plate-like member data) to the CAD system, parts are created and arranged at positions where the respective components are arranged in the CAD system, and finally the respective parts are joined together, including the actual shape of the angle joint part. An actual shape drawing of the structure is generated.

The second CAD system connecting means according to claim 19 determines the engagement shape of the angle connecting part from the angle information and the real shape information of the standard model stored in advance, thereby obtaining the three-dimensional real shape model. Is to be automatically generated.

FIG. 30 is a schematic diagram of an example of a structure to be drawn divided by cross sections indicated by front and rear cross-section numbers 0 to 2 and left and right cross-section numbers 0 to 6. As in the case of the first CAD system connecting means of the eighteenth aspect, also in this figure, the cross-section number, the arrangement order number, and the installation angle data are automatically assigned to each angle. For example, in the case of the horizontal angle 301, information such as its arrangement, shape, and installation angle is expressed as follows. That is, the front and rear section number is 1, the arrangement order number is 3, and the installation angle data is 270.
The shape data is L50 × 50 × t6.

The characteristic data storage means stores in advance the actual shape information of the standard model including the actual shape information of the engagement of the angle connecting portion. FIG. 31 is a schematic diagram showing an example of such a standard model. For example, the information content of the horizontal angle 301 in FIG. 30 is compared with the actual shape information of the standard model in FIG. 31, an angle corresponding to the angle 301 is determined from the standard model, and Information is added as joint shape information of the angle 301.

The procedure of the index determination will be described below.

1: Since the front and rear section numbers are 1, it is recognized that the section is an intermediate section.

2: Since the arrangement order number is 3, it is recognized that it is arranged at an intermediate position.

3: In the standard model based on the information in the preceding items 1 and 2, this angle corresponds to the angle 311
Angle 312 and angle 313 are narrowed down.

4: The fixed angle data of the angle 301 is 2
Since the angle is 70 degrees, a search for the same angle among the three angles of the standard model shows that the angle 313
Is obtained.

By the above procedure, the engagement shape of the joint between the angles is determined, and the actual shape information of the joint and the optimum design information (dimension information, component component position information, etc.) called from the table X of the analysis information management means. , Installation angle information, deletion data, cross-sectional characteristic data, plate-like member data, etc.), and constructs a three-dimensional actual shape model, and delivers the three-dimensional actual shape information to a CAD system.
In the system, parts are created and arranged at positions where the respective constituent parts are arranged, and finally, the parts are joined to generate an actual shape drawing of the structure including the actual shape of the angle joint.

Although the above description has been made with reference to a structure having a relatively small depth used as a control panel or an instrumentation rack, the present invention is limited to a structure having the above-mentioned shape. However, the present invention can be similarly applied to a stationary structure provided with a framework made of linear structural members.

[0107]

As described above, according to the vibration analysis support system of the present invention, when analyzing the vibration of a stationary structure such as a control panel or an instrumentation rack, it is possible to achieve the target earthquake resistance. It is possible to provide a system that can efficiently derive design information and efficiently create a three-dimensional real shape model from the analysis result.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of the present system.

FIG. 2 is a diagram showing a method of numbering structural members.

FIG. 3 is a diagram showing a method of sectioning;

FIG. 4 is a diagram showing a method of expressing a difference in installation angles of structural members.

FIG. 5 is a view showing a state in which a structural member is simulated by a beam.

FIG. 6 is a graph showing a relationship between a natural frequency of a structural member and a value specific to a cross section.

FIG. 7 is a graph showing a relationship between a natural frequency of a structural member and a value specific to a material.

FIG. 8 is a view showing a state in which a connecting member is simulated by a spring.

FIG. 9 is a graph showing a relationship between a natural frequency of a coupling member and a value specific to a spring.

FIG. 10 is a diagram showing an example of an installation pattern of a coupling member on the bottom surface of a structure.

FIG. 11 is a graph showing a relationship between an installation pitch of a coupling member and a natural frequency.

FIG. 12 is a graph showing the relationship between the thickness of a plate member and the natural frequency.

FIG. 13 is a flowchart showing the flow of the entire arithmetic processing of the vibration analysis support system of the present invention.

FIG. 14 shows an example of a two-dimensional model setting screen (in the case of an outer frame structural member)

FIG. 15 shows an example of an internal angle setting screen (in the case of a vertical angle).

FIG. 16 is a diagram showing a method of assigning numbers between connection points of a structural member.

FIG. 17 is an example of a setting screen of a plate-shaped member created in a cross section

FIG. 18 is a view showing a coordinate system for setting a plate-like member and a method of specifying a coordinate value when deleting a surface;

FIG. 19 shows a method of simulating an instrument with a hexahedron and an example of an instrument setting screen.

FIG. 20 is a diagram showing a mounting pattern of an instrument.

FIG. 21 is an example of an instrument mounting setting screen.

FIG. 22 is an example of a setting screen of a connecting member for fixing an instrument.

FIG. 23 is a flowchart showing a method for selecting an optimum sectional shape of a structural member according to claim 8;

FIG. 24 is a flowchart showing a method for selecting an optimum dimensional standard for a structural member according to claim 9;

FIG. 25 is a flowchart showing a method for selecting an optimum material of a structural member according to claim 11;

FIG. 26 is a flowchart showing a method for selecting an optimum standard for a joining member according to claim 13;

FIG. 27 is a flowchart showing a method for selecting an optimum installation pitch of a coupling member according to claim 15;

FIG. 28 is a flowchart showing a method of selecting an optimum thickness of a plate member according to claim 16;

FIG. 29 is a schematic view of an example of a drawing target structure divided by cross sections indicated by front and rear cross-section numbers 0 to 2 and left and right cross-section numbers 0 to 2;

FIG. 30 is a schematic diagram of an example of a drawing target structure divided by cross sections indicated by front and rear cross-section numbers 0 to 2 and left and right cross-section numbers 0 to 6;

FIG. 31 is a schematic view showing an example of a standard model.

[Explanation of symbols]

1. Vibration analysis support system according to the present invention 2. Vibration analysis system 3. Three-dimensional CAD system 11
... input means, 12 ... display screen, 13 ... characteristic data storage means, 14 ... analysis model definition subsystem,
15 analysis information management means 16 analysis result determination means 17 optimization subsystem 18 CAD
System connection means, 41 unequal sides angle, 42 unequal sides angle in setting screen, 51 ... beam, 81 ...
... bolt, 82 ... weight, 83 ... spring, 141
…… Input screen panel, 142 …… Section characteristic data,
291: Vertical angle, 292, 293, 301
…… Horizontal angle, 311, 312, 313 …… Angle

Claims (19)

[Claims] 1. A stationary structure mainly composed of a linear structural member constituting a framework, a rigid element coupled to the framework, and a coupling member, based on input design information. A vibration analysis support system that constructs a three-dimensional analysis model, performs computation by passing information to and from a vibration analysis system, and outputs optimal design information for optimizing the vibration characteristics of the structure, wherein input means for inputting information And a display screen for displaying information, The structural member, the rigid element, the connecting member, and the characteristic data of a plurality of candidate members that can be used as a plate-shaped member connected to the framework, the member or element A characteristic data storage means in which a table A stored for each type and for each candidate is prepared in advance, and a two-dimensional model is constructed according to a predetermined procedure from design information of the structure, and the table is designated according to the designation. An analysis model definition subsystem that reads out characteristic data from A and defines a two-dimensional analysis model and then performs an operation to convert it to a three-dimensional analysis model; and a table B that stores analysis model information of the three-dimensional analysis model for each model. And a table C for storing the analysis results of the vibration analysis for each model and a table X for storing the optimal design information obtained as a result of the operation are prepared in advance, and the input design information is delivered to the analysis model definition subsystem. To construct a three-dimensional analysis model, receive the three-dimensional analysis model information from the analysis model definition subsystem and store it in the table B, and deliver the three-dimensional analysis model information to the vibration analysis system for analysis according to a predetermined procedure. And analysis information management means for receiving an analysis result from the vibration analysis system and storing the analysis result in the table C; When Buru C the analysis result is stored, and compared with a preset target value reads the analysis results from the table C,
It is determined whether or not a predetermined condition is satisfied. When it is determined that the condition is satisfied, the computation is instructed and the three-dimensional analysis model information read from table B is stored in table X as optimal design information. Analysis result determination means for instructing the continuation of the operation when the determination is made; and specifying the type of the member to be optimized and the type of the characteristic when the operation continuation is instructed; Based on the three-dimensional analysis model information based on the initial design information read from the table B, the information is exchanged with the vibration analysis system in accordance with a predetermined procedure, and the calculation is performed. It is determined whether the result satisfies a preset condition. When it is determined that the optimization is completed, the end of the calculation is instructed and the three-dimensional analysis model information is stored in the table X as the optimal design information. A vibration analysis support system, comprising: 2. The analysis model definition subsystem divides a three-dimensional model of the structure based on input design information into a set A of a plurality of planes that are perpendicular to a bottom surface and parallel to each other. On the other hand, while creating the set A, the two-dimensional model of the structure is formed by dividing a plurality of plane sets B perpendicular to the bottom surface and parallel to each other and orthogonal to the plane set A to create a sectional view set B. The two-dimensional analysis model is defined by designating the members or elements to be used for the constructed two-dimensional model according to a predetermined procedure, and then defining the set A of the cross-sectional views and the set B of the cross-sectional views. The vibration analysis support system according to claim 1, wherein a three-dimensional analysis model is constructed by performing a combination calculation and converting the data into a three-dimensional analysis model. 3. The analysis model definition subsystem displays, on a display screen, each sectional view of the set A and the set B with respect to the constructed two-dimensional model in accordance with designation of each figure. According to the designation of the type of the member or element in the sectional view, the characteristic data of a plurality of corresponding member candidates are read out from the table A, a list is displayed on a display screen, and the member or element to be used is selected from the list. The vibration analysis support system according to claim 2, wherein the two-dimensional analysis model is defined by specifying and specifying. 4. The vibration according to claim 2, wherein the set A of sectional views or the set B of sectional views includes at least a front view and a right or left side view of the structure. Analysis support system. 5. The characteristic data stored in Table A is
Cross-sectional characteristic data of the structural member candidate, material property data of the structural member candidate, information on the installation angle of the structural member candidate, spring element data of the spring for which the candidate for the joining member is simulated, and candidate member for the joining The vibration analysis support system according to claim 1, further comprising: an installation pitch data and a thickness data of the plate-shaped member. 6. An optimization target selecting means for selecting and specifying a type of a member to be optimized and a type of characteristic when an operation continuation is instructed, and said optimization target selecting means. In accordance with the designation, the characteristic data of the member of the designated type is read from the table A, and a candidate extracting means for extracting one set of a plurality of member candidates based on the characteristic data; Optimization analysis model definition means for reading three-dimensional analysis model information and defining a plurality of replacement three-dimensional analysis model information each replaced by a plurality of member candidates extracted by the candidate extraction means; and the plurality of replacement three-dimensional analysis models Each piece of information is stored in the table B and passed to the vibration analysis system for analysis, and each of the analysis results is received from the vibration analysis system and stored in a table. Optimization information management means to be stored in the table C, the optimization information management means performs a predetermined operation based on the analysis result stored in the table C, and selects an optimum candidate for the specified optimization target member. Optimum candidate calculating means to be specified, and optimal replacement three-dimensional analysis model information obtained by replacing with the optimum member candidate selected by the optimum candidate calculating means are stored in Table B and transferred to a vibration analysis system for analysis. And an optimum candidate selecting means for storing the analysis result received from the vibration analysis system in the table C, and reading the analysis result stored in the table C by the optimum candidate selecting means, and the analysis result satisfies a preset condition. It is determined whether or not the condition is satisfied, and when it is determined that the optimization is completed, an operation end is instructed, and the optimal replacement three-dimensional analysis model information read from the table B is updated. 6. The vibration analysis support system according to claim 1, further comprising: an optimization determining unit that stores the appropriate design information in the table X and instructs continuation of the operation when the determination is negative. 7. The optimization target selecting means includes: a sectional shape type of a structural member, a dimension standard of the structural member, a material of the structural member, a standard of the coupling member, an installation pitch of the coupling member, and a plate shape. 7. The vibration analysis support system according to claim 6, wherein the type of optimization target is selected in the order of the plate thickness of the member. 8. The cross-sectional characteristic of the structural member candidate stored in the table A when the optimization target selecting means specifies a cross-sectional shape type of a structural member as an optimization target. From the data, a set of a plurality of candidate members having the same material as the structural member in the initial design information but having the same weight per unit length and different cross-sectional shapes is extracted, and the initial three-dimensional analysis model information stored in Table B is extracted. The cross-sectional characteristic data in is replaced with the cross-sectional characteristic data of the plurality of extracted member candidates to define a plurality of substituted three-dimensional analysis models, and each of the substituted three-dimensional analysis model information is transferred to a vibration analysis system. After selecting the cross-sectional shape type having the largest natural vibration numerical value of the analysis result obtained by performing each vibration analysis as the optimal cross-sectional shape type of the structural member, the table is selected. 7. The optimization of the cross-sectional shape type of the structural member is performed by replacing the initial three-dimensional analysis model information stored in the storage unit with the three-dimensional analysis model information of the optimum cross-sectional shape type. Vibration analysis support system. 9. The cross-sectional characteristic data of a member candidate of an already selected optimum cross-sectional shape type, wherein the member optimization subsystem, when the optimization target selecting means specifies a dimension standard of a structural member as an optimization target, From the list of the above, N (N is a number of 3 or more) dimensional standards members including a dimensional standard in which the section-specific value takes the minimum value and a dimensional standard in which the cross-section-specific value takes the maximum value within the dimensional standard range to be optimized A set of candidates is extracted, and the cross-sectional characteristic data of the three-dimensional analysis model information having the optimum cross-sectional shape stored in the table B is replaced with the extracted cross-sectional characteristic data, respectively, and N replacement three-dimensional analysis is performed. A model is defined, each of the N pieces of substituted three-dimensional analysis model information is transferred to a vibration analysis system, and each is subjected to vibration analysis. Based on the N natural vibration values f _{1 to} f _n obtained as the analysis result, , Solid The vibrating frequency f is approximated by a polynomial f (x) which is a function of the cross-section specific value x, and x at which the function value becomes the target natural vibration numerical value is obtained.
Was selected as the optimum dimensional specifications nearest cross-specific dimensional specifications having a value x _0, the N number of substituted three-dimensional analysis model information, replaced with optimal substituted three-dimensional analysis model information having selected the the dimensionally method Standards At the same time, the optimal replacement three-dimensional analysis model information is transferred to the vibration analysis system for analysis, and it is determined whether the analysis result received from the vibration analysis system satisfies a preset condition, and the condition is satisfied. When it is determined that the optimization has been completed, the operation is instructed, the optimal replacement three-dimensional analysis model information is stored in the table X as the optimal design information. 7. The vibration analysis support system according to claim 6, wherein the dimensional standard of the structural member is optimized by repeating the extraction and the selection of the optimal dimensional standard. 10. The method according to claim 1, wherein the value specific to the section is I / A (where I / A
10. The vibration analysis support system according to claim 9, wherein is a second moment of area, and A is a sectional area. 11. The member optimization subsystem, when the optimization target selecting means designates a material of a structural member as an optimization target, a list of material property data of a member candidate of an already selected optimum dimension standard. From the above, one set of N (N is a number of 3 or more) material candidates including a material having a minimum value and a material having a maximum value of the material-specific value within a material range to be optimized is obtained. The extracted material property data of the three-dimensional analysis model information having the optimal dimension specification stored in the table B is replaced with the extracted material property data to define N substituted three-dimensional analysis models. Each of the N pieces of substituted three-dimensional analysis model information is transferred to the vibration analysis system to perform a vibration analysis, and the natural frequency f is calculated based on the N natural vibration values f _{1 to} f _n obtained as the analysis results. Material specific Approximated by a polynomial which is a function of the value x, the function value f (x) x is determined which is the target natural frequency number, the nearest material-specific values x in x in table A ₀
Is selected as the optimal material, and the N pieces of substituted 3D analysis model information are replaced with the optimally substituted 3D analysis model information of the selected material, and the optimally substituted 3D analysis model information is vibrated. Delivered to the analysis system to perform the analysis, and determine whether the analysis result received from the vibration analysis system satisfies the preset condition, and when the condition is satisfied and the optimization is determined to be completed, instruct the computation end. Then, the optimal replacement three-dimensional analysis model information is stored in the table X as optimal design information. The vibration analysis support system according to claim 6, wherein the material of the member for use is optimized. 12. The material-specific value is E / ρ (where E / ρ
The vibration analysis support system according to claim 11, wherein is a longitudinal elastic modulus, and ρ is a material density. 13. A list of spring characteristic data of a candidate member usable as the coupling member when the optimization target selecting means designates a standard of the coupling member as an optimization target. A set of N (N is 3 or more) standard candidate members including a standard in which the value specific to the spring takes the minimum value and a standard in which the spring-specific value takes the maximum value in the installation pattern in the initial design information is extracted. By replacing the spring characteristic data of the three-dimensional analysis model information having the optimum material stored in the table B with the spring characteristic data of the extracted member candidates, N springs to be optimized for a predetermined installation pattern are replaced. Is defined, and each of the N pieces of substituted three-dimensional analysis model information is transferred to a vibration analysis system to perform a vibration analysis.
N natural vibration numerical values f _{1 to} f obtained as the analysis result
Based on _n , the natural frequency f is approximated by a polynomial f (x), which is a function of the spring-specific value x, to obtain x at which the function value becomes the target natural vibration value. the standard coupling member having a value x _0, selected as the best standard for a given installation pitch, the N-substituted three-dimensional analysis model information, the optimum substituted tertiary having coupling members of the selected this standard In addition to replacing the original analysis model information, the optimal replacement three-dimensional analysis model information is transferred to the vibration analysis system to perform analysis, and whether or not the analysis result received from the vibration analysis system satisfies a preset condition. When it is determined that the optimization is completed by satisfying the condition, the end of the operation is instructed, and the optimal replacement three-dimensional analysis model information is stored in the table X as the optimal design information. By repeating the selection of the next set of extraction and optimum standards wood candidates, vibration analysis supporting system according to claim 6, characterized in that the optimization of the standard coupling member. 14. The value specific to the spring is 2π (n · k _H
/ M) ^1/2 (where n is the number of the coupling member, k _H vibration analysis support system of claim 13, wherein the spring constant of the translational direction, M is characterized by further comprising the total weight) of the structure . 15. The member optimizing subsystem, when the optimization target selecting means specifies a coupling member installation pitch as an optimization target, from a list of installation pitch data of coupling member candidates of the selected standard. , N including the minimum value and the maximum value in the installation pattern of the initial design information (N
Is set to 3 or more), and the installation pitch data of the three-dimensional analysis model information having the optimum specification of the coupling member stored in the table B is extracted from the extracted N sets. With the installation pitch data of
N replacement three-dimensional analysis models to be optimized with respect to a predetermined standard are defined, each of the N replacement three-dimensional analysis model information is transferred to a vibration analysis system, and each vibration analysis is performed. The natural frequency f is approximated by a polynomial f (x), which is a function of the installation pitch x, based on the N natural frequency values f _{1 to} f _n obtained as determined, the pitch x ₀ installation closest coupling member to x selected as the optimal installation pitch in table a, the N-substituted three-dimensional analysis model information, the optimum substitution 3D analysis with selected the該据with pitch In addition to replacing with the model information, the optimal replacement three-dimensional analysis model information is transferred to the vibration analysis system to perform the analysis, and the analysis result received from the vibration analysis system is set to a predetermined condition. When it is determined whether or not the condition is satisfied, when the condition is satisfied and the optimization is determined to be completed, the operation is instructed, the optimal replacement three-dimensional analysis model information is stored in table X as the optimal design information, 7. The vibration analysis support system according to claim 6, wherein the extraction of the next set of the plurality of installation pitches and the selection of the optimum installation pitch are repeated to optimize the installation pitch of the coupling member. 16. The member optimizing subsystem, when the optimization target selecting means designates a plate thickness of a plate-like member as an optimization target, a minimum value and a list of plate thickness data of the plate-like member. N including the maximum value (N is 3 or more)
Is extracted, and the sheet thickness data of the three-dimensional analysis model information stored in the table D is replaced with the sheet thickness data of the extracted sheet thickness set, respectively. N replacement three-dimensional analysis models are defined, and each of the N pieces of three-dimensional analysis model information is transferred to the vibration analysis system to perform a vibration analysis, and N obtained as an analysis result is obtained.
Based on the natural frequency values f _{1 to} f _n , the natural frequency f is approximated by a polynomial f (x), which is a function of the plate thickness x, to obtain x at which the function value becomes the target natural frequency value. select the thickness x ₀ nearest to x as an optimum thickness in, the N-substituted three-dimensional analysis model information, along with replacing with optimal substituted three-dimensional analysis model information having a thickness which is the selected, the The optimal replacement 3D analysis model information is transferred to the vibration analysis system for analysis, and it is determined whether the analysis result received from the vibration analysis system satisfies a preset condition. When the judgment is made, the end of the operation is instructed, the optimal replacement three-dimensional analysis model information is stored as the optimum design information in the table X, and when it is judged no, the extraction of the next set of a plurality of sheet thicknesses and the By repeating the selection, The vibration analysis support system according to claim 6, wherein the thickness of the plate-like member is optimized. 17. The member optimization subsystem reads characteristic data of a plurality of corresponding member candidates from the table A according to designation of a type of a member to be optimized or a type of characteristic, and displays the characteristic data on a display screen. 17. The vibration analysis support system according to claim 8, wherein a list is displayed, and a member candidate to be optimized is selected and designated from the list. 18. When the combination pattern information of the number of structural members connected is further stored in advance in the characteristic data storage means, and when the optimum design information is stored in the table X,
A calculation is performed based on the optimum design information read from the table X and the characteristic data including the combination pattern information read from the table A to determine the actual shape of the coupling portion of the structural member. And the three-dimensional actual shape information of the structure obtained based on the optimal design information
1st handover to AD system to generate actual shape drawing
2. The vibration analysis support system according to claim 1, further comprising: a CAD system connection means. 19. When the actual shape information of the standard model including the actual shape information of the engagement of the connecting portion of the structural member is further stored in advance in the characteristic data storage means, and when the optimum design information is stored in the table X, Based on the optimal design information read from the table X and the actual shape information of the standard model, the actual shape of the meshing portion of the structural member is determined, and the actual shape is obtained based on the actual shape information and the optimal design information. 2. The vibration analysis support according to claim 1, further comprising a second CAD system connecting means for transferring the obtained three-dimensional actual shape information of the structure to a CAD system and generating an actual shape drawing. system.