JPH04109366A - Structure analysis supporting system - Google Patents

Abstract

PURPOSE:To efficiently execute structure analysis, to flexibly set up the conditions of the structure analysis and to obtain an analytical result with high usability by starting preprocessing immediately after the formation of drawing data. CONSTITUTION:A disk device 32 stores CAD data to be used for structure analysis, the material data of a target to be analyzed, analytical input data, data obtained by the structure analysis, CAD data obtained by post processing, and example data. A CAD/structure analysis supporting terminal 34-n is connected to a host CPU 30 and a drawing obtained by the post processing is printed out from a printer 36. Each terminal 34-n is provided with a display 38-n, a keyboard 40-n and a function keyboard 42-n and a designer uses these units. Since formed drawing data are pre-processed without executing data conversion, the structure analysis is efficiently executed and data are transferred to preprocessing and analytical processing, analytical conditions can be flexibly set up and an analytical result with high usability can be obtained.

Description

[Detailed Description of the Invention] [Table of Contents] Overview Field of Industrial Use Conventional Technology Problems to be Solved by the Invention Means for Solving the Problems Effects of the Invention [Overview Regarding the analysis support method, we aim to provide a system that allows structural analysis to be performed more efficiently.We have developed a pre-processing means that generates analysis input data from drawing data, and an analysis system that performs structural analysis using the analysis input data. A processing means, a post-processing means for visualizing and displaying the results of structural analysis as an image, and a drawing creation processing means for generating drawing data in a format that can be directly handled by the pre-processing means according to an input operation. Ru.

[Industrial Application Field] The present invention relates to a structural analysis support method for performing structural analysis using drawing data.

In order to further shorten product development time and improve quality, it is desirable to utilize structural analysis support systems from the upstream stage of product design.

Therefore, a support system is used that performs structural analysis processing using drawing data obtained by a CAD system.

[Prior Art] When data of a two-dimensional figure or three-dimensional figure is created in a CAD system, the data is converted into a predetermined format and then output.

The data output from the CAD system is read into the structural analysis support system, converted into a format for structural analysis, and then handed over to pre-processing.

In the pre-processing, CAD converted for structural analysis
Analysis input data is generated from the data, and a structural analysis using the analysis input data is performed in the next analysis process.

The result of this analysis is a list of numerical values, so it is visualized and displayed as a tag image through post-processing.

[Problem to be solved by the invention] Conventionally, the CAD system and the structural analysis support system were separate systems, and the CAD data was
CAD data format conversion is performed when it is output from the system and when it is read into the structural analysis support system, so it takes time to exchange data between the two systems.
Therefore, the efficiency of system utilization decreases.

The present invention has been made in view of the above-mentioned conventional circumstances, and
The purpose is to provide a system that allows structural analysis to be performed more efficiently.

[Means for Solving the Problem] In order to achieve the above object, the present invention employs the method shown in FIG. 1.

In the pre-processing means IO shown in the figure, analysis input data is generated from drawing data.

Further, the analysis processing means 12 performs structural analysis using the analysis input data.

Furthermore, the results of the structural analysis are displayed as a visualized tag image by the post-processing means 14.

Then, in the drawing creation processing means 16, the pre-processing means 1
Drawing data in a format that 0 can directly handle is generated according to the input operation.

Further, the physical property data of the object to be analyzed is delivered to the pre-processing means 1o and the analysis processing means 12 as parameters from the physical property data management means I8.

Furthermore, the results of the structural analysis are sent to the printing means 2 in a predetermined format.
0 is output on the paper. The drawing registration means 22 converts the data into drawing data and then registers it in the database.

[Operations] In the present invention, when drawing data is created, pre-processing can be started immediately without data conversion.

Further, by passing the physical property data of the object to be analyzed as parameters to the pre-processing means 10 and the analysis processing means 12, the conditions for structural analysis can be flexibly set.

Furthermore, the results of the structural analysis can be output on paper, or
By creating a database, you can refer to it as an example when designing later! I? (can.

[Embodiments] Hereinafter, preferred embodiments of the system according to the present invention will be described based on the drawings.

FIG. 2 shows a structural analysis support/stem to which the present invention is applied, and a disk device 32 of a host CPU 30 stores CAD data (two-dimensional and three-dimensional) used in structural analysis, and materials of the object to be analyzed. (physical properties) data, analysis input data (bulk data).

Data obtained by structural analysis (expressed in numerical values for search), CAD data obtained by post-processing, and data referenced as an example at the time of post-processing design (hereinafter referred to in Figure 1) are stored.

In addition, terminals 34-0.34-1...34-n for CAD/structural analysis support are connected to the host CPU 30, and drawings obtained by post processing are stored in the terminal 34-0. It is printed out from a printer (a plotter is also possible) 36.

And each terminal 34-0.34-1...34-0 has a display 38-0.38-1, 38-n+
Keyboard 40-0. 4.0-1...40 n+
Function 10-board 42-042-1・Cloudy・
42-n are provided, each of which is used by the product designer.

3, 4, and 5, the operation of this embodiment is explained, and this series of processing includes the terminal 34-0.34. -1
・φ fight 34-n is used.

First, CAD data (for example, parts data) in a format that can be directly handled by the pre-processing 10 is generated in the CAD processing (step 16).
...Performed according to the input operation for -34-〇.

Next, analysis input data is generated from this CAD data in pre-processing (step 10).

In this embodiment, the pre-processing 10 uses C
Since the AD data is generated by the CAD process (step 1.6), no conversion of the CAD data is performed.

In addition, in this process (step 10), a dimensional model (for example, a three-dimensional wire frame) is created according to the CAD data (step I00 1.01.1
02. '103. 104), block division after sono (
In the case of a plate shape, the shape is divided into triangles or quadrangles, and in the case of a solid shape, it is divided into triangular prisms or quadrilateral prisms).

Furthermore, setting of boundary conditions (step 114., Load).

(Set constraint conditions interactively for each side or surface)
, setting the number of mesh divisions (step 115).

If you set the number of mesh divisions for one side of a block, the number of mesh divisions will be set for all sides according to the side length.)
, setting of Menyu division parameters (step 118.,
, drawing ID, input/output cuff aisle.

(Target solver, material conditions, etc. are specified) are performed in order.

Then, when mesh data is generated (step I 1
7. ,, in the case of a large model, mesh data is merged), and this mesh data is output to a file as analysis input data (step 117).

However, when setting parameters related to the material (physical properties) of the analysis target, material database management processing (Step 1)
8) is used to reference the material database (step 180).

Note that data registration, data change, and data deletion in the material database have been performed in advance (step 181), and this database contains linear characteristic data (Young's modulus by temperature, Poisson's ratio, mass density, etc.).

Nonlinear characteristic data (stress strain curve by temperature), creep characteristic data (creep curve by temperature and load), and fatigue characteristic data (fatigue curve by temperature) are registered.

Furthermore, when a material name is selected in the pre-processing (step 10), its data is extracted from the material database and automatically set.

When the analysis input data is output to a file in the above pre-processing (step 10), the analysis input data is read out in the analysis processing (step 12).

In the M4fr processing (step 12), parameters necessary for analysis (attendance cuff aisle, list output type, etc.) are set (step 120), and the above material database is referred to when changing material conditions (step 18).
o).

Next, the solver is activated (step 121) and analysis processing is started.

The analysis results are expressed as an array of numerical data and output to a set file (step 122).

Furthermore, the output file of the analysis result is read out in post processing (step 14).
), when the parameters (for shading) are set (step I40), the analysis results are visualized.
An image is displayed (step 141).

Then, the analysis results are converted into a predetermined format (contour diagram, vector diagram representation format in the structural diagram 9), and this data is printed out on paper from the printer 36 of the terminal 34-O (step 20).

In addition, CA of the input/output cuff, l[, angle, etc. of the output diagram.
D parameters are set (step 142) and the CA created according to those parameters (step 143)
D data is registered in the CAD database (step I44).

This CAD database is used to create case data for structural analysis (step 221), and the analysis case data is registered in the analysis case database (step 22).
2).

At that time, the index file (search index file) and data file are edited (step 223,
224), the index file is referenced when searching for data in the data file (step 225).

In addition, in the post-processing (step 14), search parameters such as input file name, search type (stress, change reaction force, etc.), and number of items to be searched are set (step 145).
).

Therefore, numerical values such as stress can be searched from the analysis results (step 146).

As described above, according to this embodiment, when drawing data is created, pre-processing can be started immediately without data conversion, so that structural analysis can be performed more efficiently.

Further, since the physical property data of the object to be analyzed is passed as a parameter to the pre-processing and the analysis processing, it is possible to flexibly set the conditions for structural analysis, and it is therefore possible to obtain highly usable analysis results.

The results of the structural analysis are then output on paper as a tag database, so they can be referenced as examples during later design.

This is extremely suitable for improving technology and accumulating know-how.

[Effects of the Invention] As explained above, according to the present invention, pre-processing can be started immediately with the creation of drawing data, making it possible to perform structural analysis more efficiently. Since conditions can be set flexibly, it is possible to obtain highly usable analysis results, and the results of structural analysis can be referenced as examples during subsequent design, allowing you to further improve your technology and steadily accumulate know-how. becomes possible.

40-1-=40-n 42-0. 42-1-・42-n ・En keyboard O cow-Bo・Funk

[Brief explanation of drawings]

FIG. 1 is an explanation of the principle of the invention; FIG. 2 is an explanatory diagram of the configuration of the embodiment; FIGS. 3, 4, and 5 are flowcharts explaining the operation of the embodiment. 34-0゜38-〇. Reiken host CPU ・Disk device 34-1...34. -n @・Fist terminal or printer 38-1...38-n pot...Disk 4-O? Figure 1

Claims (3)

[Claims] (1) Pre-processing means (10) that generates analysis input data from drawing data, and analysis processing means (10) that performs structural analysis using the analysis input data.
12), a post-processing means (14) for visualizing and displaying the results of structural analysis as an image, and a drawing creation processing means (16) for generating drawing data in a format that can be directly handled by the pre-processing means (10) according to an input operation.
), and a structural analysis support method characterized by having the following. (2) Pre-processing means (10) that generates analysis input data from drawing data, and analysis processing means (10) that performs structural analysis using the analysis input data.
12), a post-processing means (14) for visualizing and displaying the results of structural analysis as an image, and a drawing creation processing means (16) for generating drawing data in a format that can be directly handled by the pre-processing means (10) according to an input operation.
); and physical property data management means (18) for passing physical property data of an object to be analyzed as parameters to a pre-processing means (10) and an analysis processing means (12). (3) Pre-processing means (10) that generates analysis input data from drawing data, and analysis processing means (10) that performs structural analysis using the analysis input data.
12), a post-processing means (14) for visualizing and displaying the results of structural analysis as an image, and a drawing creation means (16) for generating drawing data in a format that can be directly handled by the pre-processing means (10) according to an input operation. It is characterized by having a printing means (20) for outputting the results of structural analysis on paper in a predetermined format, and a drawing registration means (22) for converting the results of structural analysis into drawing data and registering it in a database. A structural analysis support method.