JP2006268181A - Cae system, and cae executing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To execute CAE anywhere by allowing hardware not installed with the CAE program to access hardware installed with a CAE program. <P>SOLUTION: CAE conditions are set in a CAE condition setting part 6 displayed in a client. At this time, a CAD file converting part 7 converts a CAD file selected by a user into a file of a three-dimensionally viewable format, and a three dimensional form is displayed in the client. When an "analysis execution " button is pushed after finishing setting, a CAE condition file output part 8 outputs a CAE condition file describing the CAE conditions received from the client, and a representative position of a form entity applied with the conditions. In a CAE condition automatic setting part 9, the outputted CAE condition file is read, the CAD file is read in a server, the read CAE conditions are processed by a CAE processing part 5, and CAE is carried out. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention includes both hardware (server) in which the CAE program is installed and hardware (client) in which the CAE program does not need to be installed, and accesses the server from the client using the network. The present invention relates to a CAE system that performs CAE, and a CAE execution method that performs CAE according to the procedure of the CAE system.

  In the field of CAE, a system that allows anyone other than a CAE expert to carry out CAE from anywhere is desired. For example, it is conceivable that a salesperson asks a customer for a design request, immediately performs CAE on the shape created on the spot, and presents a result such as a stress distribution diagram to the customer.

  In this case, in the past technology, a device devised so that anyone other than a CAE expert can easily execute CAE has been proposed (see, for example, Patent Document 1).

According to Patent Document 1, a user (analysis worker) can perform CAE analysis of a desired object simply by performing selection or input operation according to operation screens that are sequentially displayed. Therefore, there is an effect that CAE can be easily carried out even by a non-CAE specialist.
Japanese Patent Laid-Open No. 2003-316832

  However, in Patent Document 1, the CAE program needs to be installed in hardware (notebook personal computer or the like) that performs CAE. Therefore, in order to be able to implement CAE with a large number of hardware, a large investment in the CAE program is necessary.

  The present invention was devised to solve such problems, and its purpose is to change from hardware not having the CAE program installed to hardware having the CAE program installed, as long as there is an environment capable of connecting to the network. An object of the present invention is to provide a CAE system and a CAE implementation method that can access and implement CAE from anywhere.

  In order to achieve the above object, the CAE system of the present invention includes both hardware (server) in which the CAE program is installed and hardware (client) in which the CAE program does not need to be installed, and uses a network. A CAE system for performing CAE by accessing a server from a client, a shape display step for displaying a three-dimensional shape in a format format that can be three-dimensionally viewed on the client screen, and a client screen In the CAE conditions setting step for setting the CAE conditions for the three-dimensional shape entity, the CAE conditions sent from the client to the server, and the representative information of the shape entity to which the conditions are applied, CA that executes CAE on the server And a execution step.

In the CAE execution step, when the various conditions are sequentially set to the shape on the server, the server closest to the representative position of the entity sent from the client to the server is set for the various conditions to be set for the individual shape entity. The conditions are applied to the shape entity above.

  In the CAE execution step, when the conditions are sequentially set to the shape on the server, the conditions to be set for individual shape entities are set on the same server as the entity number of the entity sent from the client to the server. These conditions are applied to the shape entity.

  According to the CAE system and the CAE implementation method of the present invention, anyone other than a CAE specialist can implement CAE from anywhere as long as there is an environment that can be connected to a network.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram conceptually showing an embodiment of the CAE system of the present invention.

This CAE system is roughly divided into a server in which a CAE program is installed and a client that does not require the CAE program to be installed. The client can be roughly divided into a display unit 1 for displaying an analysis model and an analysis result, an input unit 2 including a mouse and a keyboard used when operating items displayed on the display unit 1, a network (Web ) And a network unit 3 for accessing the server. The server is roughly divided into a network unit 4 for connecting to a client using a network (Web), a CAE processing unit 5 for performing normal CAE analysis such as mesh creation, material setting, condition setting, and analysis execution. The CAE conditions setting unit 6 for setting the CAE conditions by the operation of the display unit 1 and the input unit 2, and the CAD file received from the client via the CAE conditions setting unit 6 can be viewed three-dimensionally on the network. The CAD file conversion unit 7 that converts the file as a format file and the CAE conditions such as material, mesh, fixed condition, and load condition received from the client through the CAE various condition setting unit 6 and the various conditions are applied. CAE condition file output unit for outputting a CAE condition file describing the representative positions of shape entities The CAE conditions automatic setting unit 9 that reads the CAE conditions file and automatically applies the read CAE conditions, and the obtained CAE result file as a file in a format format that can be viewed three-dimensionally on the network A CAE result file output unit 10 for output.

  In the above configuration, the display unit 1, the input unit 2, the network unit 3, the network unit 4, the CAE processing unit 5, the CAE various condition setting unit 6, and the CAE various condition automatic setting unit 9 must be used for carrying out the present invention. Although necessary, the CAD file conversion unit 7, the CAE various conditions file output unit 8, and the CAE result file output unit 10 may be omitted. If the CAD file conversion unit 7 is not provided, it is sufficient to prepare a file in a format format that can be viewed three-dimensionally on the network at the same time as the CAD file, and read it simultaneously when selecting the CAD file. When there is no CAE various conditions file output unit 8, the CAE various conditions sent from the client to the server may be directly passed to the CAE various conditions automatic setting unit 9. When the CAE result file output unit 10 is not provided, the obtained numerical result may be simply displayed on the client. If necessary, the CAE various condition setting unit 6, the CAD file conversion unit 7, and the CAE various condition file output unit 8 may be placed on the client side.

  In the above configuration, the display unit 1, the input unit 2, the network unit 3, and the network unit 4 are general ones, and detailed description thereof is omitted here. Also, since the CAE processing unit 5, the CAD file conversion unit 7, and the CAE result file output unit 10 are known to those skilled in the art, a detailed description thereof is omitted here.

  Next, the CAE various condition setting unit 6, the CAE various condition file output unit 8, and the CAE various condition automatic setting unit 9, which are the main parts of the present invention, will be described.

<Description of CAE Conditions Setting Unit 6>
When a client accesses the CAE various condition setting unit 6 of the server, a CAE various condition setting screen described later is displayed on the display unit 1 of the client. When a “CAD file selection” button is pressed and a CAD file on the client is selected, the selected CAD file is transferred (copied) to the server. The transferred CAD file is converted by the CAD file conversion unit 7 into a format file that can be viewed three-dimensionally on the network (the original CAD file also exists as it is). The converted file is displayed on the display unit 1 of the client. As other processes, CAE conditions such as solver, analysis type, material, mesh, fixed condition, and load condition are set. At this time, the conditions to be set for the entity of a shape (such as a specific surface or side) can be set by selecting the entity of the displayed shape. It should be noted that the CAE conditions setting method is a well-known technique by those skilled in the art, and thus detailed description thereof is omitted here.

<Description of CAE Conditions File Output Unit 8>
As a general process of CAE, a CAE various condition file is automatically output when an “execute analysis” button described later is pressed.

  Here, an example of the CAE conditions file is shown in FIG.

  In FIG. 2, the first line is a number indicating the type of solver used, and “1” indicates that it is a dedicated solver.

  The second line is a number indicating the type of analysis, and “1” indicates a linear intensity analysis. For reference, when the number indicating the type of analysis is “2”, linear thermal stress analysis is performed, and when the number is “3”, natural vibration analysis is performed.

  The third line is a number indicating whether the shape is solid or shell, and “1” indicates that the shape is solid. Incidentally, “2” is a shell.

The fourth line is the name of the selected CAD file, which in this example indicates test.sat. For your reference, the name ***. Sat is a type of CAIS called CAIS.
This indicates that the file is a D file.

  The fifth line is the name of the material that is most frequently applied to the shape, and indicates iron in this example.

  The 6th and 7th lines are cases where a material different from the above-mentioned iron is applied. The shape entity (body) type to which the material is applied, the material name, and the material is applied. The barycentric coordinates as the representative positions of the shape entities are shown. The sixth line shows that the material is applied to the body, the material name is aluminum, and the barycentric coordinates of the applied body are (15,15,15). The seventh line indicates that the material is applied to the body, the material name is copper, and the barycentric coordinates of the applied body are (75, 75, 75). In the CAE system of this embodiment, the barycentric coordinates are adopted as the representative position, but other values may be used.

  The eighth line is a character string “mesh” indicating the end of material setting.

  The ninth line is the overall average element length used for mesh creation, and indicates 20 in this embodiment.

The 10th and 11th lines are cases where local setting is performed, and the types of shape entities to which the local setting is applied, the local element lengths, and the representative positions of the shape entities to which the local setting is applied. The barycentric coordinates are shown. The 10th line indicates that the local setting of the mesh is applied to the surface, the local element length is 10, and the barycentric coordinates of the applied surface are (30, 40, 50). The eleventh line indicates that the local setting of the mesh is applied to the side, the local element length is 5, and the barycentric coordinates of the applied side are (10, 0, 80).

  The 12th line is a character string “BC” indicating the end of the mesh setting.

  The 13th and 14th lines are boundary conditions (fixed conditions + load conditions). The type of shape entity to which the boundary conditions are applied, the number indicating the type of boundary conditions, and the boundary conditions are applied. The barycentric coordinates as the representative position of the shape entity and the attribute of the boundary condition are shown. In the 13th line, the boundary condition is applied to the surface, the type of the boundary condition is a fixed condition, the barycentric coordinates of the applied surface are (30, 80, 10), and the direction to be fixed as an attribute. Is all of x, y, and z (in the case of a solid, rx, ry, and rz are ignored).

In the 14th line, the boundary condition is applied to the surface, the boundary condition type is uniform pressure, the barycentric coordinates of the applied surface are (10,60,60), and the size is 5. 5 is shown.

  The 15th line is a character string “exe” indicating the end of the boundary condition setting.

  Although the center of gravity is output as the representative position of the shape entity, the entity number of the shape entity may be output instead of outputting the center of gravity that is the representative position.

  Further, although it is output in the form of a CAE various conditions file, it is not always necessary to output to a file as described above, and the contents described above may be directly transferred to the CAE various conditions automatic setting unit 9. As a direct delivery method, a method of passing it as a program argument is conceivable.

<Description of CAE Conditions Automatic Setting Unit 9>
When the CAE various condition file is output, the CAE various condition file is read, based on the read information, the shape is read on the server, and the CAE various conditions are applied to the shape on the server.

  Here, the process of applying the CAE conditions will be described with reference to FIG.

  First, the number indicating the type of solver used from the first line is read, and the type of solver is set. Next, the number indicating the analysis type is read from the second line, and the analysis type is set. Next, a number indicating whether the shape is solid or shell is read from the third line and set. Next, the CAD file name is read from the fourth line, and the shape is read on the server.

Next, the material name most applied to the shape is read from the fifth line and applied to the entire shape on the server. In this way, the lines are continuously read until the line described as “mesh” in the eighth line is reached, and a different material is applied to each shape entity. The method reads the shape entity type, the material name, and the center of gravity coordinates as the representative position of the described shape entity, and selects the shape entity of the shape on the server that matches the shape entity type. Apply the material to a nearby shape entity.

  More specifically, in this example, “iron” in the fifth row is most frequently applied to the shape (body), “aluminum” in the sixth row is next, and “7” is the next. This indicates “copper” on the line. Therefore, first set "iron" to all bodies. Next, “aluminum” in the sixth row is set to the body of the shape entity closest to the barycentric coordinates (15, 15, 15). In other words, the material is replaced from “iron” to “aluminum”. Next, “copper” in the seventh row is set to the body of the shape entity closest to the barycentric coordinates (75, 75, 75). In other words, the material is replaced from “iron” to “copper”.

  When the line described as “mesh” is read in this way, the next line is read and the overall average element length of the mesh is set. The line is continuously read until the line described as “BC” is set, and the mesh is locally set. The method reads the shape entity type, the local element length, and the center of gravity coordinates as the representative position of the described shape entity, and selects the coordinates from the shape entities on the server that match the shape entity type. Apply the local element length to the nearest geometric entity.

  When the line described as “BC” is read, the next line is read, and until the line described as “exe” is read, the boundary condition is set. The method reads the shape entity type, the boundary condition type, the barycentric coordinates as the representative position of the described shape entity, the attribute of the boundary condition, and the shape entity of the shape on the server that matches the shape entity type. From inside, apply the boundary condition to the shape entity closest to the coordinates. Incidentally, in the case of natural vibration analysis, the order and the lowest frequency are read from the line after exe.

  If the representative information of the shape entity described in the CAE conditions file is not the center of gravity that is the representative position but the entity number of the shape entity, the shape information on the server that matches the type of the shape entity is displayed. It may be applied to the shape entity that matches the entity number from among the shape entities.

  Next, a CAE analysis processing procedure by the CAE system having the above configuration will be described.

When accessing the CAE system of the server from the client hardware (notebook personal computer or the like) using the network (for example, starting a browser such as Internet Explorer and inputting the address of the CAE various condition setting unit 6), the client The display unit 1 displays a screen 20 of the CAE various condition setting unit 6 shown in FIG. On this screen 20, the shape to be analyzed, the analysis result, and the like are displayed on the left side of the figure, and the CAE processing procedure is displayed on the right side of the figure. When the user sets “solver” and “analysis type” from this screen 20 and presses the “select CAD file” button 21, a file selection screen (not shown) appears, and when a CAD file on the client is selected. The selected CAD file is transferred (copied) to the server, and the CAD file conversion unit 7 generates a three-dimensional shape file in a format format that can be three-dimensionally viewed on the network at a predetermined location on the server. Then, the shape file generated on the server is displayed on the left side of the display unit 1 in the figure. This file conversion process is a well-known technique for those skilled in the art, such as being installed in general software, and will not be described here. As a specific example, an ACIS file is converted to an hsf file. Conversion and so on.

  Next, press the “Material Settings”, “Fixed Condition Settings”, “Load Condition Settings”, and “Mesh Settings” buttons to display the respective setting screens (not shown). Input operations and selection of shape entities are sequentially performed. An example of such an operation is also described in Patent Document 1 described above, and is a procedure well known in the art by those skilled in the art.

  When these settings are completed, the information of the client is transferred to the server by pressing the “execute analysis” button 22, and the server executes the following. First, the set CAE conditions (solver, analysis type, CAD information, material, fixed condition, load condition, mesh condition) are output from the CAE conditions file output unit 8. The CAE conditions file is not output at once after the “execute analysis” button 22 is pressed, but for each setting of each condition (solver, analysis type, CAD information, material, fixed condition, additional condition, mesh). May be output. Next, as described in the above <Description of CAE various conditions automatic setting unit 9>, the CAE various conditions file is read, the shape is read on the server based on the read information, and the shape on the server is read. Apply the conditions and execute CAE (the CAE processing unit 5 actually performs the processing). Finally, when the CAE analysis in the CAE processing unit 5 is completed, the CAE result file output unit 10 outputs a distribution map of the obtained analysis results as a result file in a format format that can be viewed three-dimensionally on the network. Output to location. As a result, the CAE result is displayed on the left side of the display unit 1 in the figure.

1 is a block diagram conceptually showing an embodiment of a CAE system of the present invention. It is explanatory drawing which shows an example of a CAE various conditions file. It is explanatory drawing which shows the example of a screen displayed on a display part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display part 2 Input part 3 Network part 4 Network part 5 CAE process part 6 CAE various condition setting part 7 CAD file conversion part 8 CAE various condition file output part 9 CAE various condition automatic setting part 10 CAE result file output part 20 CAE various Condition setting screen 21 “Select CAD file” button 22 “Execute analysis” button

Claims (4)

CAE is performed by accessing the server from the client using the network, with both the hardware (server) on which the CAE program is installed and the hardware (client) on which the CAE program does not need to be installed. A CAE system,
A shape display step for displaying a 3D shape in a format format that can be viewed in 3D on a client screen;
A CAE conditions setting step for setting CAE conditions for a three-dimensional shape entity on the client screen;
A CAE system, comprising: CAE conditions sent from a client to a server and CAE execution steps for executing CAE on a server based on representative information of a shape entity to which the conditions are applied.   In the CAE execution step according to claim 1, when the conditions are sequentially set to the shape on the server, the conditions to be set for the individual shape entity are the representative positions of the entities sent from the client to the server. The CAE system according to claim 1, wherein the conditions are applied to a shape entity on a server closest to.   In the CAE execution step according to claim 1, when the conditions are sequentially set to the shape on the server, the entity number of the entity sent from the client to the server is set for the conditions to be set for the individual shape entity. The CAE system according to claim 1, wherein the conditions are applied to a shape entity on the same server.   A CAE implementation method for performing CAE according to the procedure of the CAE system according to claim 1, claim 2, or claim 3.

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