JP2002207778A - Automatic producing method for analysis model and its program recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic producing method for an analysis model and its program recording medium correcting a difference between a skilled person and an inexperienced person. SOLUTION: A skeleton model, a finite element method model, and cross section data are defined by inputting them using a template displayed on a graphical user interface operation screen. The cross section data is automatically calculated on the basis of defined cross sectional shapes, and a result of the calculation is stored so as to be used in later structural analyses.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically creating an analysis model using a template function and a program storage medium thereof, and more particularly to a method for facilitating the creation of a skeleton model and a finite element analysis model used for performing a structural analysis. The present invention relates to a method for automatically creating an analysis model for correcting a difference between a skilled person and an inexperienced person in model creation, and a program storage medium therefor.

[0002]

2. Description of the Related Art In order to create a structural analysis model, it is necessary to create a skeleton model and a finite element model. Regarding skeletal model creation, in the field of bridge analysis, one linked with a coordinate calculation program is known.

[0003] Regarding the creation of a finite element model, a model having a function of creating a shape by a CAD system is known. There is no known skeleton model creation or finite element model creation that creates an analysis model by giving parameters using a template function. Conventionally, calculated numerical values are directly input for the cross-sectional data. There is no known device that selects a template of a cross-sectional shape and inputs parameters. Further, there is no known device that automatically calculates cross-sectional data by defining a cross-section of an arbitrary shape and designating a cross-sectional shape, and retains the cross-sectional data so that it can be used for subsequent analysis.

[0004]

According to the conventional structural analysis method, there is a problem that a great deal of labor and time must be spent for creating an analysis model. For this reason, in order to save labor, the use of CAD or shape creation tools to create models has increased. However, even in such a case, since it is necessary to learn the operation method of each tool, the skill level of the operation technique greatly affects the work efficiency.

[0005] In the field of bridge analysis, some models can define a model in conjunction with coordinate calculation. However, since the coordinate calculation itself is for objects located in a plane, the applicable range is limited. I will. For this reason, there is a problem that it is not possible to cope with a truss bridge or an arch bridge for which information on the height direction is essential. An object of the present invention is to provide a method for automatically creating an analysis model which facilitates creation of a skeleton model and a finite element analysis model used in performing a structural analysis to correct a difference between a skilled person and an inexperienced person in model creation. It is to provide the program storage medium.

[0006]

In order to achieve the above object, a method provided by the first aspect of the present invention is a method for creating an analysis model, which includes a skeleton model to be analyzed and a finite element method. A plurality of model templates prepared for model creation are displayed on the graphical user interface operation screen, and a plurality of model templates corresponding to the analysis target are displayed on the graphical user interface operation screen. Parameters from the model template of the selected model template, and parameters for specifying the shape of the selected model template are graphically displayed.
A model is created by inputting on the user interface operation screen, and a plurality of cross-section specification templates prepared for defining and inputting the cross-section specifications of the model to be analyzed are displayed on the graphical user interface operation screen. A cross-section template corresponding to the analysis target is displayed from among the plurality of cross-section template displayed on the graphical user interface operation screen, and the selected cross-section template is displayed. Enter the parameters to specify the shape on the graphical user interface operation screen, or define the cross-section by defining an arbitrary cross-section, and automatically specify the cross-section specifications based on the defined cross-section. Calculate, and keep the results of the calculations for later use in structural analysis Characterized in that it comprises a step, an automated method of creating the analysis model.

According to the first aspect, a skeleton model and a finite element method model to be analyzed can be easily generated, and the cross-sectional data can be easily defined. In a second aspect of the present invention, in the first aspect, the analysis object is a bridge, and the frame model is a bridge-type model including a truss bridge, an arch bridge, and a suspension bridge to be subjected to bridge analysis.

According to the second aspect, an analysis model of a bridge can be easily and automatically generated. In a third aspect of the present invention, in the first aspect, the finite element method model is a cylinder, a sphere, and a target to be subjected to the finite element method analysis.
This is a model including at least one of a plate element model including a pipe joint and a rectangular element model including a rectangular body, a cylinder, and a sphere to be analyzed by the finite element method.

According to the third aspect, a plate element model including a cylinder, a sphere, and a pipe joint and a rectangular element model including a rectangular body, a cylinder, and a sphere to be analyzed by the finite element method can be easily formed. Can be automatically generated. In a fourth aspect of the present invention, in the first aspect described above, the cross-sectional specifications of the skeleton model are specifications including a cross-sectional area, a second moment of area, a center of gravity position, and a section modulus.

According to the fourth aspect, it is possible to specifically define the cross-sectional data of the skeleton model. In a fifth aspect of the present invention, in the first aspect, the model created using the skeleton model template and the finite element method model template is modified, added, or deleted on the graphical user interface operation screen. Is possible.

According to the fifth aspect, the model once created can be easily corrected, added, or deleted on the screen, so that it is easy to create an optimal model. In a sixth aspect of the present invention, in the first aspect, the defined cross-sectional data is stored in a file, and the file is readable and updatable. According to the sixth aspect, the defined cross-sectional data held in the file can be read and used at an arbitrary time, and can be updated when necessary, so that a model having a desired cross-sectional shape can be easily created. Can be created.

According to a seventh aspect of the present invention, a skeleton model and a finite element method model created by the method for automatically creating an analytical model according to any one of the first to sixth aspects are used as a general-purpose finite element method program. To analyze by
In this case, for the created frame model and the created finite element method model and the defined cross-sectional data, a graphical user interface is used to define a unit for the analysis model shape, a unit for defining the cross-sectional data, and a unit for defining the load. An analysis method of an analysis model is provided, wherein a unit and an analysis result display unit are arbitrarily defined, and a boundary condition and a load are defined using a graphical user interface.

According to the seventh aspect, it is easy to analyze the created analysis model by defining various units, boundary conditions, and loads using a graphical user interface. .
According to an eighth aspect of the present invention, in the above-described seventh aspect, the processing of the vehicle load according to the specification for road bridge specific to bridge analysis is performed.

According to the eighth aspect, it is possible to analyze an analysis model when a vehicle load specified in the specification for road bridges is applied. In a ninth aspect of the present invention, in the seventh aspect, the deformation, sectional force and stress obtained by the analysis are graphically displayed on a screen. According to the ninth aspect, since the analysis of the analysis model can be performed while looking at the screen, the analysis is facilitated.

In a tenth aspect of the present invention, in the seventh to ninth aspects, when there are a plurality of load cases,
By adding the sectional force, which is the analysis result for each case, and at least one of the displacement and the reaction force by designating a coefficient for each case, the displacement, the reaction force, and the sectional force for a plurality of load cases are obtained. I made it. Thereby, a plurality of analysis results can be effectively used.

In the eleventh aspect of the present invention, the maximum value and the minimum value of the sectional forces (N, Qy, Qz, Mx, My, Mz) are calculated from the results calculated by adding the above cases. Extracted and displayed the summation case and the maximum and minimum values at that time. As a result, the maximum value and the minimum value of the section force in the analysis target are obtained, which is convenient for the safety design of the analysis target.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a flowchart illustrating a method for automatically creating an analysis model according to an embodiment of the present invention. 2 to 9 are diagrams showing images displayed on the graphical user interface operation screen in each step shown in FIG. Hereinafter, each step of FIG. 1 will be described in detail. -Creation of a skeleton model First, in step S1, a plurality of skeleton model templates prepared for creating a skeleton model are displayed on a graphical user interface operation screen. If the analysis target is a bridge analysis, a plurality of skeleton model templates prepared for creating a skeleton model are displayed for each type of truss bridge, arch bridge, suspension structure type, and the like to be analyzed.

In step S2, a skeleton model template corresponding to the analysis target is selected from a plurality of skeleton model templates displayed on the graphical user interface operation screen. In step S3, a skeleton model is created by inputting parameters for specifying the shape of the selected skeleton model template on the graphical user interface operation screen.

A specific example of steps S1 to S3 will be described with reference to FIGS. FIG. 2 is a diagram showing a graphical user interface operation screen for selecting one skeleton model template from a plurality of skeleton model templates in the form of a truss bridge according to the embodiment of the present invention and setting the geometric dimensions. . This screen is displayed when creation of a skeleton model is selected on a menu screen (not shown). In FIG. 2, an icon group 22 including a plurality of (11 in the illustrated example) icons for calling a template relating to the truss bridge is displayed on the graphical user interface operation screen 21. When an icon indicating the truss bridge format to be analyzed is selected from the icon group 22, six templates 23 of the truss bridge format are shown in the illustrated example, and the template to be analyzed is shown in FIG.
The frame model template named is selected as shown by shading, and is displayed as the parameter input assistance screen 24 of the selected frame model.
While viewing this screen 24, a parameter such as a bridge length L, a bridge height H, and a bridge division number n is input to an input unit 25 to create a truss-type frame basic model.

FIG. 3 is a diagram showing a graphical user interface operation screen 31 for selecting one skeleton model from a plurality of arch type skeleton models and setting the shape and dimensions according to the embodiment of the present invention. In FIG. 3, by selecting one arch type icon from the icon group 22 shown in FIG. 2, six arch type template 32 for the skeleton model are displayed. Then, a skeleton model template named Viewrendeel is selected as shaded, and the parameter input assistance screen 3 for the selected skeleton model is selected.
3 is displayed. By inputting parameters such as the bridge length L, the bridge height H, and the number n of bridge divisions into the input unit 34 while viewing this screen 33, a basic model of an arched skeleton is created.

In FIG. 2 or 3, missing members such as bridge piers are added, and if there are extra members, the desired skeleton model is completed by deleting them. Creation of Finite Element Model In step S4, a plurality of finite element model templates prepared for creating the finite element model are displayed on the graphical user interface operation screen.

In step S5, a finite element method model template corresponding to the analysis object is
Select from a plurality of finite element method model templates displayed on the interface operation screen. Step S6
Then, a finite element method model is created by inputting parameters for specifying the shape of the selected finite element method model template on a graphical user interface operation screen.

A specific example of steps S4 to S6 will be described with reference to FIGS. Finite element models include plate element models such as cylinders, spheres, and pipe joints,
There are rectangular element models such as rectangular bodies, cylinders, and spheres. In the plate element model, cylinders, spheres, pipe joints, and the like are represented by a set of plate elements. In the rectangular element model, a rectangular body, a cylinder, a sphere, and the like are represented by a set of rectangular elements.

FIG. 4 is a diagram showing a graphical user interface operation screen 41 for selecting a spiral tube as a plate element model and setting the shape and dimensions according to the embodiment of the present invention. When the creation of a plate element model of a spiral tube is selected in the icon group 42, this screen is displayed. When the finite element model is a plate element model, a plurality of (six in the illustrated example) icon groups 42 for calling a template relating to the finite element model shown in FIG. 4 are displayed. An icon (lower right icon in the icon group 42) corresponding to the spiral tube is selected from among the prepared icon groups such as a cylinder, a sphere, and a pipe joint. Then, as shown in the graphical user interface operation screen 41 of FIG. 4, the top view 43 and the side view 44 of the spiral tube, the tube diameter r of the spiral tube, and the number of divisions n2 around the tube when dividing into plate elements. And a spiral radius R of the spiral tube.
And a spiral pipe parameter input assistance screen 46 showing the spiral pipe division number n1 and the spiral pipe angle φ. Then, while viewing the screens 45 and 46, the parameter input unit 47
The plate element model of the spiral tube is created by inputting these parameters into the parameters.

FIG. 5 is a diagram showing a graphical user interface operation screen 51 for selecting the creation of a plate element model of a pipe joint and setting the shape and dimensions according to the embodiment of the present invention. When, for example, a pipe joint (the icon in the upper middle of the icon group 42) is selected from the icon group 42 on the screen shown in FIG. 4, the pipe joint is displayed as shown in FIG. An input assistance screen 52 is also displayed. While viewing this screen 52, the radius R and length L of the main pipe, the number of divisions N1, N
2. The parameters such as the minimum number of division Nmin and the parameters of the branch pipe are set, and a finite element model called a pipe joint is created. Since the model based on the set parameters is displayed on the screen, the model can be confirmed on the screen.

FIG. 6 is a diagram showing a graphical user interface operation screen 61 for selecting sphere creation from a rectangular element model and setting the shape dimensions according to the embodiment of the present invention. When a sphere icon is selected from an icon group (not shown) similar to the icon group 42 shown in FIG. 4, a sphere cross section 62 and a parameter input assistance screen 63 as shown in FIG. 6 are displayed. A model is created by inputting parameters such as the number of divisions n1, n2, n3, the angle, the inner diameter r, and the outer shape R into the input unit 64 while looking at the screen 63 in order to specifically specify the shape of the sphere. Also in this case, since the model based on the set parameters is displayed on the screen, the model can be confirmed on the screen.

In FIG. 1, a frame model is first created in steps S1 to S3, and then a finite element method model is created in steps S4 to S6.
This order may be reversed. Further, depending on the model, the sectional shape may be defined after creating only the skeleton model or only the finite element method model. Definition of cross-section specifications In step S7, a plurality of cross-section specification templates prepared for defining and inputting the cross-section specifications of the skeleton model to be analyzed are displayed on the graphical user interface operation screen.

In step S8, it is determined whether the cross-sectional shape of the model to be created is an arbitrary shape or a shape to be selected from a template. If it is determined that the template should be selected from the templates, in step S9, the section specification template corresponding to the analysis target is selected from a plurality of section specification templates displayed on the graphical user interface operation screen field.

Next, in step S10, parameters for designating the shape of the selected section specification template are input on a graphical user interface operation screen to define the section specifications. If it is determined in step S8 that an arbitrary-shaped cross section is to be defined, the parameters of the arbitrary-shaped cross section are input in step S11 to define the cross-sectional data.

A specific example of steps S7 to S11 will be described with reference to FIGS. As described above, the cross-sectional specifications (cross-sectional area, moment of inertia of cross-section, gravity center position, and cross-sectional modulus) of the skeleton model to be subjected to structural analysis correspond to the corresponding cross-sectional template from the prepared plural cross-sectional template. It is automatically calculated by selecting and inputting parameters that specifically specify the shape, or defining a cross section of an arbitrary shape, and is retained so that it can be used in the subsequent structural analysis. The cross section of the model to be created is selected from, for example, a concrete rectangular cross section, a steel frame thin plate cross section, and a cross section for a plate element.

FIG. 7 is a view showing a screen for selecting a cross-sectional shape and defining a cross-sectional dimension used for calculating cross-sectional data of a rectangular cross section of concrete according to the embodiment of the present invention. When a cross-section specification is selected on a menu screen (not shown), a cross-section type selection screen 71, an operation screen 75, and an action screen 7 are displayed.
6 is displayed. To define a new cross-sectional shape, click “Add” in the operation screen 75. When a concrete item is selected from the selection screen 71, a template group 72 (14 templates in the illustrated example) including a plurality of templates indicating the cross-sectional shape is displayed as shown in FIG. When, for example, a template of a rectangular cross section (third row, third column shown) is selected from the template group 72, the name of the selected cross section is displayed on the cross section specification holding screen 77, and the parameters of the rectangular cross section are displayed. A screen 73 and an input unit 74 for assisting the input are displayed. While viewing this screen 73, input parameters to obtain a desired cross-sectional shape.
By clicking the “Apply” button in the step, the shape of the rectangular cross section is determined, and the cross-section data is held on the cross-section data holding screen 77.

By clicking the “Add” button in the operation screen 75 and inputting parameters into the input section 74,
A cross section with the same type and different parameters as the cross section being displayed can be additionally created. When the "Delete" button in the operation screen 75 is clicked, the displayed cross-sectional model is displayed on the cross-section specification holding screen 77.
Can be deleted from.

To update (edit) the definition, select the cross-sectional data to be updated on the cross-sectional data holding screen 77 and click the "change" button in the operation screen 75 to display the parameter input support screen 73, Is input again and the “Apply” button is clicked. FIG. 8 is a diagram showing a screen for selecting a cross-sectional shape and defining a cross-sectional dimension used for thin-sheet cross-sectional data calculation according to the embodiment of the present invention. As in FIG. 7, when the definition of the cross-section data is selected on a menu screen (not shown), a selection screen of the cross-section type 71 is displayed.
When steel (Steel) is selected from the cross section type 71, as shown in FIG. 8, a template group 82 (16 templates in the illustrated example) including a plurality of templates indicating the cross section shape is displayed. . This template group 8
2 to, for example, a template of a thin plate section (third row shown,
When (Template in the first column) is selected, the name of the selected cross section is displayed on the cross section specification holding screen 87, and
A rectangular section parameter input assistance screen 83 and a parameter input section 84 are displayed. While viewing this screen 83, the user inputs parameters to obtain a desired cross-sectional shape. The functions of “apply”, “add”, “delete”, and “change” are the same as those in FIG.

FIG. 9 is a view showing a screen for calculating the specifications of a cross section of an arbitrary shape according to the embodiment of the present invention. Template group 7
When an arbitrary-shaped cross-section template (3rd row, 1st column) is selected from 2, the vertical and horizontal scales as shown in FIG. 9 are displayed. When a plurality of coordinates on the vertical axis and a plurality of coordinates on the horizontal axis are selected to create a desired cross-sectional shape using this scale, a dotted line as shown is drawn. If two desired intersections are selected from the intersections of these dotted lines,
A line segment connecting the two intersections is drawn. With this method, a shape close to a desired cross section is created in a screen shape, and a model of an arbitrary desired cross section is defined using a tool for turning a line segment into a curve.

When the sectional shape is determined as described above, the sectional specifications are calculated and stored in a storage device so that they can be used in the subsequent structural analysis. By using the above functions, it is possible to facilitate the creation of the structural analysis model and the definition and input of the cross-sectional specifications. Sectional data is automatically calculated based on the input parameters or the defined shape, and the results of the calculation are retained for use in subsequent structural analysis.

A desired model is created by using a model editing function having a function of modifying, adding, and deleting a model automatically created by using the template function according to the above embodiment. The cross-sectional shape and the cross-sectional data of the already calculated cross-sectional data are stored in a file, and the file is read and used as needed. This reduces the work of calculating and inputting the cross-sectional data. In addition, it has a function of updating the file to improve maintainability.

FIG. 10 is a diagram showing a unit setting screen for input data and output data (calculation result). On the screen shown in FIG. 10A, the unit (structure) in the structure of the skeleton model or the finite element model, the unit (cross section) in the cross section,
Unit of temperature (temperature) when performing temperature load, unit of time (hour) when performing time load, unit of unit volume weight,
The unit for the analysis model shape, the unit for defining the cross-sectional data, and the unit for defining the load, such as the unit of the load, are input, and the model is created and the cross-sectional data is defined in the embodiment described above.

"Output data" on the upper side of FIG.
When the tab is clicked, the screen is switched to the screen shown in FIG. 10B, and the units (displacement, cross-sectional amount, elastic modulus / modulus) for displaying the analysis result obtained by setting as shown in FIG.
(Stress, angle). This makes it possible to set different units in the frame model creation, the finite element method model creation, and the definition of the cross-sectional specifications.

FIG. 11 is a diagram showing a boundary condition setting screen according to the embodiment of the present invention. When creating an analysis model of a structure, it is necessary to set a fixed point and a fixed direction according to a place where the structure is installed. For this reason, for example, when the setting of the boundary condition is selected on a menu screen (not shown) for an analysis model of a certain bridge, a screen shown in FIG. 11 is displayed, and a point to be fixed can be set. The fixed points are displayed as triangles on the screen, and the figure shows that the X and Y directions are fixed.

FIG. 12 is a view showing a load setting screen according to the embodiment of the present invention. In the figure, a template group 1 displayed by selecting “Beam” from “element type”
21, a template indicating an evenly distributed load (2 rows 1
If (column) is selected and the "Add" button is clicked in this state, a screen 122 for assisting the input of the load value is displayed. While looking at this screen 122, a load value is set at a position where a load is applied. In this way, the load is defined on the screen so that the load is applied to the position indicated by the arrow as shown on the lower side of the figure.

FIG. 13 is a diagram showing a screen for setting the vehicle load according to the specification for road bridges according to the embodiment of the present invention. Examples of loads on the bridge include the deadline of the effect line, which is the load of the bridge itself, other dead loads due to the accessories of the bridge, the vehicle load when a vehicle is running on the bridge, and the crowd on the bridge. There are crowd loads and other live loads when you are in When the vehicle load is selected, a live load setting screen is displayed. In the screen, the center line L
1, setting of the start and end of the main girder / line, setting of the start and end of the horizontal girder, setting of the start and end of the median strip, and setting of the load place with means. In the illustrated example, the center line is L1, which is the same as the line of C2 in the illustrated model, the start and end of the main girder / line are G1 and G3, and the start and end of the horizontal girder are C1 and C9. In this way, the load, the reaction force, and the sectional force in the most disadvantageous state are obtained by loading the vehicle load specified by the road bridge specification.

FIG. 14 is a diagram showing drawing of a sectional force diagram according to the embodiment of the present invention. After defining the unit using the method described so far, defining the frame model, finite element method model, and cross-sectional specifications, defining boundary conditions, defining load cases, and defining loads, the menu screen appears. To execute the analysis. Then, when the analysis result is displayed, FIG.
A screen as shown in FIG. 4 is displayed. FIG. 14 shows the frame of the bridge and the distribution of the sectional force applied to the frame.

FIG. 15 is a view simultaneously showing a modified view of the plate element and the contour line of the sectional force according to the embodiment of the present invention. As described above, the deformation and sectional force obtained by the analysis are shown in FIG.
As shown in FIG. 15, a chart is displayed on the screen. It has a function of outputting a created drawing to a printer and outputting a numerical file. It also has a function of combining analysis results and extracting a maximum value for design.

When there are a plurality of analysis results obtained in this way, according to the embodiment of the present invention, a coefficient is designated for each case, and the displacement, reaction force, and sectional force, which are the analysis results, are added. be able to. FIG. 16 is a diagram showing a setting screen for adding loads. When the addition of loads is designated on a menu screen (not shown), the screen of FIG. 16 is displayed.

First, in step 1, "Steel" or "Concrete" is selected from "use code" at the lower left of this dialog. Next, in step 2, select “Dea” from the “Type” of the load case.
Select "d" (dead load), "Live" (live load), or "Other" (other). Next, in step 3, the item "+ /
Select “Yes” or “No” from “Consider”.

Next, when the part "Supplement 1 / R" is clicked in step 4, a dialog shown in FIG. 17 is displayed. Enter the value of "R" in the table of this dialog. Next, in step 5, the coefficients for each load case in the table of FIG. Next, in step 6, when nothing is specified in the "addition by maximum / minimum" in the upper right of the dialog, only the addition of the sectional forces is performed. To calculate the sum of the displacement and the reaction force, check this part.

Next, in step 7, "table storage" in the "action" group at the lower right of the dialog is selected, and step 5 is selected.
Save the contents set in steps 6 and 6. Next, in step 8, the “calculation execution” button at the bottom of the dialog is clicked to add the cases. FIG. 18 is a diagram showing a state where the sixth column of the table of FIG. 16 is added.

From the results calculated by the “addition of each case” thus obtained, according to the embodiment of the present invention, the maximum value and the minimum value of the sectional forces (N, Qy, Qz, Mx, My, Mz) are obtained. The values are extracted, and the “added case” and the maximum and minimum values at that time can be displayed on a “Design Combination browser”.

FIG. 19 is a diagram showing the Design Combination browser. The procedure for displaying the “summing case” and the maximum and minimum values will be described with reference to FIG. First, click the “Design Combination Browser” icon on the menu screen (not shown) in step 1 and click “Design C
ombination (design combination) browser ".

Next, in step 2, the sectional forces (N, Qy, Qz, Mx, My, M) to be displayed from the tree view on the left side of the screen.
Check z). Next, in step 3, "maximum / minimum value pickup" is selected from the "adding case" at the top of the screen. Next, in step 4, "Display all" at the top of the screen
Click the icon. Then, the value is displayed.

[0051]

As is apparent from the above description, since the present invention automatically creates a structural analysis model using the template function, the model can be created without spending a great deal of labor and time in creating the structural analysis model. The effect that it becomes possible is obtained. Also, by using the editing function, the model can be easily corrected, and the range in which the template function can be used is extended.

Further, since no special tool is used, there is also obtained an effect that variation in the analysis model due to a difference in experience between a skilled person and an inexperienced person can be reduced. Furthermore, since the input of the cross-sectional data is automatically performed by specifying the cross-sectional shape by specifying the template and inputting the parameter or by specifying the arbitrary-shaped cross-section by defining the cross-sectional shape, the input of the cross-sectional data is facilitated. can get.

Furthermore, since the definition of the unit used for the calculation and the definition of the analysis condition can be made on the operation screen of the graphical user interface, there is an effect that these definitions can be easily made. further,
Since the processing of the vehicle load according to the specification of the road bridge specific to the bridge analysis can be designated by the graphical user interface operation screen, the effect that the processing can be easily executed is obtained.

Further, since the deformation and cross-sectional force obtained by the analysis are easily displayed on the screen in a diagram, an effect that the analysis result can be easily understood can be obtained.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a method according to an embodiment of the present invention.

FIG. 2 is a diagram showing a graphical user interface operation screen for selecting a truss bridge type and setting the shape and dimensions according to the embodiment of the present invention.

3 is a diagram showing a graphical user interface operation screen for selecting an arch type bridge from the screen of FIG. 2 and setting the shape and dimensions.

FIG. 4 is a diagram showing a graphical user interface operation screen for selecting a spiral tube creation from a plate element model and setting a shape dimension according to the embodiment of the present invention.

FIG. 5 is a graphical diagram for selecting the creation of a pipe joint model and setting the geometric dimensions according to the embodiment of the present invention.
It is a figure showing a user interface operation screen.

FIG. 6 is a graphical diagram for selecting a sphere creation from a rectangular element model and setting a shape dimension according to the embodiment of the present invention;
It is a figure showing a user interface operation screen.

FIG. 7 is a diagram showing a screen for selecting a cross-sectional shape and defining a cross-sectional dimension to be used for calculation of rectangular cross-sectional data according to the embodiment of the present invention.

FIG. 8 is a diagram showing a screen for selecting a cross-sectional shape and defining a cross-sectional dimension used for thin-plate cross-sectional data calculation according to the embodiment of the present invention.

FIG. 9 is a diagram showing an arbitrary-shaped cross-section specification calculation screen according to the embodiment of the present invention.

FIG. 10 is a diagram showing a unit system setting screen according to the embodiment of the present invention.

FIG. 11 is a diagram showing a boundary condition setting screen according to the embodiment of the present invention.

FIG. 12 is a diagram showing a load setting screen according to the embodiment of the present invention.

FIG. 13 is a diagram showing a vehicle load setting screen according to the specification for road bridges according to the embodiment of the present invention.

FIG. 14 is a diagram showing drawing of a sectional force diagram according to the embodiment of the present invention.

FIG. 15 is a diagram showing sectional force contours according to the embodiment of the present invention.

FIG. 16 is a diagram showing a setting screen for adding loads according to the embodiment of the present invention.

17 is a diagram showing a dialog displayed when an item “Supplement 1 / R” in the setting screen of FIG. 16 is clicked.

FIG. 18 is a diagram illustrating a state where the sixth column of the table in FIG. 16 is added;

FIG. 19 is a diagram showing a Design Combination browser displaying a maximum value and a minimum value according to the embodiment of the present invention.

[Explanation of symbols]

21: Graphical user interface screen 22: Icon group 23: Plural truss-style skeleton model templates 24 ... Selected truss-style skeleton model template 25 ... Parameter input unit 31 ... Graphical user interface screen 32 ... Plural arch-frame model templates 33 ... Selected arch-frame model templates 34 ... Parameter input unit 41 ... Graphical user interface screen 42 ... Icon group 43 ... Top view of spiral tube 44 ... Spiral tube Side view 45 ... Parameter input assistance screen 46 ... Parameter input assistance screen 47 ... Parameter input part 51 ... Graphical user interface screen 52 ... Parameter input assistance screen 53 ... Parameter input part 54 ... Parameter input Force screen 61 ... Graphical user interface screen 62 ... Section of sphere 63 ... Parameter input assist screen 64 ... Parameter input section 71 ... Section type selection screen 72 ... Template group 73 ... Parameter input assist screen 74 ... Parameter input section 75 ... Operation screen 76: Action screen 77: Cross-section specification holding screen 82: Template group 83: Parameter input support screen 84: Parameter input unit 87: Cross-section specification holding screen 121: Template group 122: Load value input support screen

Claims (16)

[Claims] 1. A method for creating an analysis model, comprising displaying a plurality of model templates prepared for model creation on a graphical user interface operation screen, and displaying a model template corresponding to the analysis target. Selecting from a plurality of model templates displayed on the graphical user interface operation screen, and inputting parameters specifying the shape of the selected model template on the graphical user interface operation screen Creates a model by using the graphical user
Displayed on an interface operation screen, and selecting a cross-section specification template corresponding to the analysis target from a plurality of cross-section specification templates displayed on the graphical user interface operation screen;
Then, parameters for specifying the shape of the selected cross-section template are input on the graphical user interface operation screen, or the cross-sectional shape is defined by defining a cross-section of an arbitrary shape. Automatically calculating cross-sectional data based on the obtained cross-sectional shape, and holding a result of the calculation so that it can be used in a subsequent structural analysis. 2. The method according to claim 1, wherein the model is at least one of a frame model and a finite element model. 3. A method for creating an analysis model, comprising displaying, on a graphical user interface operation screen, a plurality of skeleton model templates prepared for creating a skeleton model, wherein a skeleton model corresponding to the analysis target is provided. And selecting a template for the shape of the selected skeleton model template from the plurality of skeleton model templates displayed on the graphical user interface operation screen.
Creating a skeleton model by inputting on the interface operation screen, displaying a plurality of finite element method model templates prepared for finite element method model creation on the graphical user interface operation screen, Is selected from a plurality of finite element method model templates displayed on the graphical user interface operation screen, and the shape of the selected finite element method model template is designated. A finite element method model is created by inputting parameters to be performed on the graphical user interface operation screen, and a plurality of sections prepared for defining and inputting cross-sectional specifications of the skeleton model and the finite element method model Graphical user Displayed on the-interface operation screen, select the cross-sectional specification template corresponding to said analyzed from the graphical user interface operation screen plurality of sectional specifications template displayed on,
Then, parameters for specifying the shape of the selected cross-section template are input on the graphical user interface operation screen, or the cross-sectional shape is defined by defining a cross-section of an arbitrary shape. Automatically calculating cross-sectional data based on the obtained cross-sectional shape, and holding a result of the calculation so that it can be used in a subsequent structural analysis. 4. A method for creating an analysis model, comprising: displaying a plurality of finite element method model templates prepared for creating a finite element method model on a graphical user interface operation screen; A corresponding finite element method model template is selected from the plurality of finite element method model templates displayed on the graphical user interface operation screen, and the shape of the selected finite element method model template is specified. A finite element method model is created by inputting parameters on the graphical user interface operation screen, and a plurality of skeleton model templates prepared for skeleton model creation are displayed on the graphical user interface operation screen And a bone corresponding to the analysis target The model template selected from the graphical user interface operating screen template for multiple framework model displayed on, and parameters the graphical user to specify the shape of the selected skeleton model template
A skeleton model is created by inputting on the interface operation screen, and a plurality of cross-sectional specification templates prepared for defining and inputting the cross-sectional specifications of the finite element method model and the skeleton model are displayed by a graphical user. Displaying on the interface operation screen, selecting a cross-section specification template corresponding to the analysis target from a plurality of cross-section specification templates displayed on the graphical user interface operation screen,
Then, parameters for specifying the shape of the selected cross-section template are input on the graphical user interface operation screen, or the cross-sectional shape is defined by defining a cross-section of an arbitrary shape. Automatically calculating cross-sectional data based on the obtained cross-sectional shape, and holding a result of the calculation so that it can be used in a subsequent structural analysis. 5. The analysis model according to claim 3, wherein the analysis object is a bridge, and the frame model is a bridge-type model including a truss bridge, an arch bridge, and a suspension bridge to be subjected to bridge analysis. Automatic creation method. 6. The finite element method model includes a plate element model including a cylinder, a sphere, and a pipe joint to be subjected to the finite element method analysis, and a rectangular body, a cylinder, and a target object to be subjected to the finite element method analysis.
The method for automatically creating an analysis model according to claim 3, wherein the method is a model including at least one of a rectangular element model including a sphere. 7. The cross-sectional specifications of the skeleton model are:
The method for automatically creating an analysis model according to claim 3, wherein the method includes specifications including a second moment of area, a position of a center of gravity, and a section modulus. 8. The model created using the skeleton model template and the finite element method model template can be modified, added, or deleted on the graphical user interface operation screen. 4. The method for automatically creating an analysis model according to 4. 9. The method according to claim 3, wherein the defined cross-sectional data is stored in a file, and the file is readable and updatable, and can be used as an input of the cross-sectional data. How to automatically create the described analysis model. 10. A framework model and a finite element method model created by the method for automatically creating an analysis model according to claim 3 are analyzed by a general-purpose finite element method program. Using the graphical user interface for the created frame model and the created finite element method model and the defined cross-section data, using a graphical user interface, a unit for analysis model shape, a unit for cross-section data definition, a load definition An analysis method of an analysis model, wherein a unit for use and a unit for displaying an analysis result are arbitrarily defined, and a boundary condition and a load are defined using the graphical user interface. 11. The method for analyzing an analysis model according to claim 10, wherein a vehicle load is processed in accordance with a road bridge specification specific to bridge analysis. 12. The analysis method according to claim 10, wherein the deformation, sectional force and stress obtained by the analysis are graphically displayed on a screen. 13. When there are a plurality of load cases, at least one of a sectional force, a displacement, and a reaction force as an analysis result for each case is added by designating a coefficient for each case,
2. The method according to claim 1, wherein at least one of a sectional force, a displacement, and a reaction force for a plurality of load cases is obtained.
13. The analysis method of the analysis model according to any one of 0 to 12. 14. A sectional force (N, Qy, Qz, Mx, My,
The maximum value and the minimum value of Mz) are extracted, and the summation case and the maximum value and the minimum value at that time are displayed.
3. An analysis method of the analysis model according to 3. 15. A computer-readable program recording medium on which a program for executing the method for automatically creating an analysis model according to claim 1 is recorded. 16. A computer-readable program recording medium on which a program for executing the analysis method of the analysis model according to claim 10 is recorded.