JP2001357078A - Device and method for integrally analyzing form data and computer-readable storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a designer of CAD form data to speedily recognize the analyzed result of voxel form data concerning a device and a method for integrally analyzing form data for analyzing the voxel form data to be provided by dividing the CAD form data into voxels while referring to the CAD form data prepared by CAD. SOLUTION: This device is provided with a voxel dividing means 2 for dividing first form data prepared on the stage of design into voxels and converting these data to second form data, a second form data display means 3 for displaying only the second form data close to a part selected out of the first form data, a second form data analyzing means 5 for analyzing the second form data displayed by the second form data display means 3, and a first form data analyzed result display means 6 for projecting the analyzed result of the second form data by the second form data analyzing means 5 with the first form data and displaying these data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a CAD
Analysis of voxel shape data obtained by dividing the CAD shape data by three-dimensional pixels called voxels while referring to the three-dimensional CAD shape data created by (computer-aided design: computer-aided design) The present invention relates to a shape data integrated analysis device, a shape data integrated analysis method, and a computer-readable storage medium for performing the method.

[0002] In general, a voxel is an object to be analyzed.
It is defined as a small cubic volume element used to divide the dimensional CAD shape data into a lattice (called voxel division). The present invention relates to 3
It refers to a method of integrating dimension CAD shape data and analysis results of voxel shape data generated by voxel division, and accurately recognizing the analysis results on a CAD system.

[0003]

2. Description of the Related Art When analyzing CAD shape data in a general computer system, it is practically impossible to use the CAD shape data as it is. Therefore, the CAD shape data is converted by voxels. It is necessary to perform analysis based on voxel shape data (also referred to as mesh data) obtained by dividing the data into a grid. The voxel shape displayed by the voxel shape data is a set of a plurality of small cubes (ie, a plurality of voxels), and the CAD represented by the original CAD shape data.
It has a shape similar to the shape and is different from the original CAD shape. Therefore, in the conventional method, CA
The voxel shape data had to be analyzed independently of the CAD shape data designed by the designer on the D system. In other words, the analysis result of the voxel shape data after voxel division cannot be displayed in a manner superimposed on the CAD shape data designed by the designer.

On the other hand, as the size or total number of voxels is reduced in order to increase the accuracy of analysis results, the density of voxel shape data increases. It takes a very long time to generate such high-density voxel shape data and display all the analysis results.

[0005]

As described above, in the conventional method, the analysis result of voxel shape data is superimposed on the CAD shape data, so that the analysis result is obtained by CA.
It was virtually impossible to display directly on the D shape data. For this reason, there arises a problem that it becomes difficult for the designer to quickly recognize the analysis result and refer to the original CAD shape data created by the designer himself to continue or change the design of the CAD shape data. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a designer of CAD shape data can quickly recognize an analysis result of voxel shape data obtained by dividing the CAD shape data into voxels. It is an object of the present invention to provide a shape data integrated analysis device, a shape data integrated analysis method, and a computer-readable storage medium.

[0007]

FIG. 1 is a block diagram showing the principle configuration of the present invention. However, here, the configuration of the shape data integrated analysis apparatus of the present invention is shown in a simplified manner. In order to solve the above problem, as shown in FIG. 1, the shape data integrated analysis device 1 of the present invention divides three-dimensional first shape data created at the design stage by voxels, 2 is provided with voxel dividing means 2 for converting into voxel shape data. Preferably, the first shape data is CA
D shape data, and the second shape data is voxel shape data. Here, first shape data such as CAD shape data created by a designer on the CAD system is the first shape data.
The data is held in the voxel dividing means 2 as necessary.

Further, the shape data integrated analysis device 1 of the present invention includes a second shape data display means 3 for displaying the second shape data only in the vicinity of a portion selected from the first shape data. Have. In the second shape data display means 3, only the vicinity of the portion selected from the first shape data by the first shape element selection means 4, that is, the first shape data indicated by the first shape data is displayed. The second shape data existing only in the vicinity of a specific element (for example, a portion such as a surface or a side) is displayed. Here, preferably, the second shape data existing only in the vicinity of the element selected as described above is displayed by overwriting the first shape data.

Further, the shape data integrated analysis device 1 of the present invention comprises a second shape data analysis means 5 for analyzing the second shape data displayed by the second shape data display means 3; And a first shape data / analysis result display means 6 for projecting and displaying the analysis result of the shape data on the first shape data. Here, the analysis result of the second shape data existing only in the vicinity of the selected element is obtained by taking advantage of the feature that the shapes of the plurality of voxels forming the second shape data are all the same. It is possible to easily display the data directly on the shape data.

The voxel dividing means 2 and the second shape data analyzing means 5 are preferably realized by software of a computer as described later. On the other hand, the second shape data display means 3 and the first shape data / analysis result display means 6 preferably cooperate with software and hardware (for example, a display device) of a computer as described later. Is realized by:

In summary, according to the present invention, the analysis result of the second shape data such as the voxel shape data existing only in the vicinity of the element selected from the first shape data is converted into a CAD created by the designer. Since the data is directly displayed on the first shape data such as the shape data, the analysis result of the second shape data is promptly recognized while referring to the first shape data to design the CAD shape data and the like. Continuation and change can be easily performed in a short time.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction and operation of a preferred embodiment of the present invention will be described below with reference to the accompanying drawings (FIGS. 2 to 9). FIG. 2 is a block diagram showing a configuration of an embodiment according to the shape data integration analysis apparatus of the present invention. However, here, the configuration of a computer system for shape data integration analysis 10 in which the shape data integration analysis device of the present invention is applied to a general computer system is shown as a representative. Further, here, CAD shape data created by the designer on the CAD system is used as the first shape data,
Voxel shape data obtained by voxel division of the AD shape data is used as second shape data. Hereinafter, the same components as those described above will be denoted by the same reference numerals.

In the computer system 10 for shape data integration analysis shown in FIG. 2, the voxel dividing means 2 and the second shape data analysis means 5 and the second shape data display means 3 and the first shape shown in FIG. Part of the data / analysis result display means 6 is realized by a CPU (central processing unit) 9 of a computer system. In other words, the voxel dividing means 2 and the second shape data analyzing means 5, and the second shape data displaying means 3 and the first shape data /
A part of the analysis result display means 6 is realized by software of a computer.

Further, in the computer system shown in FIG. 2, the remaining portions of the second shape data display means 3 and the first shape data / analysis result display means 6 are hardware which cooperates with computer software. It is constituted by a certain display device 60. This display device 60 has a CA
It has a function of displaying voxel shape data near CAD shape elements such as a face or a side selected from the D shape data, and projecting and displaying an analysis result of the voxel shape data on the CAD shape data.

Further, the computer system of FIG.
CAD as the first shape element selecting means 4 in FIG.
A section 8 is provided. The CAD unit 8 has a function of selecting CAD shape elements such as faces and sides from CAD shape data created on the CAD system, and displaying the voxel shape data near the selected elements on the display device 60. Having. By operating the CAD unit 8 and the CPU 9 in an integrated manner, the analysis result of voxel shape data near an element selected from the CAD shape data is obtained by CAD.
It is possible to easily superimpose and display the shape data. The CAD unit 8 is also realized by software of a computer.

Further, the computer system of FIG.
An analysis program storage unit 20 for storing a program for executing the shape data integration analysis of the present invention is provided. The analysis program storage unit 20 stores a RAM (rand
om access memory) or ROM (read-only memory)
It consists of. Note that a RAM or a ROM built in the CPU 9 can be used as the analysis program storage unit. Here, the programs stored in the program storage unit 20 include the voxel dividing means 2, the second shape data display means 3, the second shape data analysis means 5, the first shape data / analysis result display means 6, And the function of the CAD unit 8.

More specifically, the above program is
The 3D CAD shape data created at the design stage
Converting into voxel shape data by dividing by voxel, displaying voxel shape data only in the vicinity of a portion selected from the CAD shape data on a display device, and voxel shape data displayed by the display device And projecting the analysis result of the voxel shape data to the CAD shape data and displaying the result.

Further, the computer system of FIG.
Elements such as faces and sides selected from the CAD shape data to be analyzed, CAD shape data or CAD
A storage unit 90 is provided for storing boundary conditions such as loads and constraints applied to the voxels after the voxel division of the shape data, and other various analysis conditions. This storage unit 90
Is also configured by RAM or ROM.

Further, the computer system of FIG.
An OS (operating system) unit 30 for controlling the operation of the CPU 9 is provided. The OS unit 30 has a function of causing the CPU 9 to execute a program stored in the analysis program storage unit 20 and controlling exchange of various data between the storage unit 90 and the CPU 9. OS above
The unit is realized by software and hardware of a computer.

Further, according to the embodiment of the present invention, when operating the computer system 10 for shape data integration analysis using a computer-readable storage medium, a storage medium holding the contents of the above-described program, For example, it is preferable to prepare a hard disk H. The hard disk H is driven by a hard disk drive 25. Here, the CAD shape elements, boundary conditions, and analysis conditions can be loaded from the hard disk H.

Further, in the computer system of FIG. 2, a data storage unit comprising a database or the like for storing data necessary for shape data integration analysis so that a plurality of users (or designers) can use it. 82-
1, 82-2 and 82-3 are provided. The data storage units 82-1 and 82-2 store the CAD shape data created on the CAD system and the voxel shape data after voxel division, respectively, and read out as necessary. Meanwhile, the data storage unit 82-3
In, voxel analysis data indicating an analysis result of voxel shape data is stored and read out as needed.

Further, in the computer system shown in FIG. 2, the first shape data reading means 7 shown in FIG.
A mouse 70 and a keyboard 75 are provided. By operating the mouse 70 and the keyboard 75, elements such as CAD shape surfaces and sides, CAD shape data, and boundary conditions such as loads and constraints added to voxels after voxel division of the CAD shape data, and the like, Are stored in the storage unit 90 (FIG. 2). Note that these CAD shape elements, boundary conditions, and analysis conditions can also be loaded from the hard disk H. Here, the CAD shape data stored in advance in the data storage unit 82-1 is also stored in the mouse 70 and the keyboard 7.
5 is supplied from the data storage unit 82-1 to the computer system.

FIGS. 3 and 4 are flowcharts 1 and 2 for explaining the processing procedure of the shape data integration analysis of the present invention, respectively. FIG. 5 is a flowchart showing three-dimensional CAD shape data and voxel shape. FIG. 4 is a perspective view showing a representative example of data. Here, when the analysis result of the voxel shape data near the element selected from the three-dimensional CAD shape data is projected and displayed on the CAD shape data created by the designer, the CPU 9 of FIG. The processing flow to be executed will be described.

As shown in the flowchart of FIG. 3, first, when the user operates a mouse, a keyboard, or the like, the original three-dimensional CAD shape data created by CAD is read and input to the computer system. (Step S1). Next, the CPU in the computer system converts the CAD shape data into voxel shape data by voxel division (step S2).

Typically, the CAD shape data C is, as illustrated in FIG. 5A, a data obtained by accurately reproducing an original three-dimensional shape (here, a shape having a cylindrical surface). Is displayed. On the other hand, voxel shape data D
As shown in FIG. 5B, a plurality of voxels, which are a collection of small cubes, display a shape as close as possible to the original three-dimensional shape. Strictly speaking, the voxel shape data D differs from the original CAD shape data C in that a jagged portion occurs at the end of the surface.

Here, returning to the flowchart of FIG. 3, the processing flow of the shape data integration analysis of the present invention will be described. The voxel shape data divided in voxel in step S2 is displayed by the display device 60 (FIG. 2). Here, the surface of the CAD shape data (cylindrical surface in FIG. 5)
Is displayed in a form divided at each boundary of a plurality of voxels (step S3).

Further, as shown in the branch of step S4, various analysis conditions for analyzing the voxel shape data are set. In this case, the voxel shape indicated by the voxel shape data is added to the normal analysis condition setting processing (step S5) for setting boundary conditions such as loads and constraints applied to the voxels after voxel division of the CAD shape data. A confirmation function is added.

More specifically, here, by taking advantage of the feature of the voxel division method that all the voxel shapes (mesh shapes) are the same shape, CAD shape elements such as faces and sides are extracted from the CAD shape data. A selection is made (step S6), and the voxel shape only around the element thus selected is displayed on the display device. For example, the voxel shape around the selected element is overwritten on the CAD shape data, or projected and displayed on the CAD shape data (step S7).

Further, as shown in step S8 of FIG. 4, when the setting of all the analysis conditions is completed, the analysis processing of the voxel shape data is executed (step S9), and the analysis result of the voxel shape data is obtained if necessary. Is displayed on the display device (step S10). Here, the analysis result of the voxel shape data of only the vicinity of the selected CAD shape element is projected and displayed on the CAD shape data by utilizing the feature of the voxel division method that all the voxel shapes are the same. If post display of voxel shape data is necessary, it is projected on CAD shape data,
The stress distribution and the like for each surface divided at the boundaries of the plurality of voxels are displayed (step S11).

In the processing flow of the shape data integration analysis as shown in FIGS. 3 and 4, since the analysis result of a part of the voxel shape data is projected and displayed on the CAD shape data, the above analysis result can be processed at high speed. Can be displayed. Therefore, the analysis conditions can be set while referring to the CAD shape data created by the designer, and the designer can quickly recognize the analysis result and continue or change the design of the CAD shape data. Can be performed in a short time.

FIG. 6 is a plan view showing how voxel shape data near an element selected from the CAD shape data is displayed. FIG. 7 is a perspective view showing how the above voxel shape data is displayed. is there. Here, three-dimensional CA
An example is shown in which voxel shape data after voxel division is displayed for a shape in which a part of a CAD shape surface represented by D shape data C is missing.

When the above-described processing flow for shape data integration analysis of the present invention is applied to the CAD shape data C, the curved surface at one corner of the CAD shape (the element hatched in FIG. 7) is 3 It is selected from dimensional CAD shape data. Further, as shown in the plan view of FIG. 6, the voxel shape data near the curved surface selected as described above is displayed so as to be superimposed on the CAD shape data. More specifically, C selected from CAD shape data
The vicinity of an AD-shaped element (here, a curved surface) is displayed in a form divided at each boundary of the plurality of voxels V. In this case, the partial voxel shape data is
Since it is only necessary to overwrite and display the AD shape data, the voxel shape data can be displayed at high speed, and the analysis conditions can be set while referring to the CAD shape data created by the designer. Becomes possible.

FIG. 8 is a plan view showing an example in which the result of voxel analysis is projected on CAD shape data and displayed. Here, CAD represented by three-dimensional CAD shape data C
The example which displayed the result of having analyzed the voxel shape data with respect to the shape which the surface of a shape became a sector in the top view was shown. In FIG. 8, a CAD shape surface (including a curved surface represented by the thickest solid line in FIG. 8) selected from the CAD shape data C is divided into voxels according to the following rules (1) to (4). The voxel analysis result is projected on the surface.

Each boundary of the voxel V (broken line in FIG. 8)
A plurality of voxel surfaces are formed by dividing the CAD-shaped surface. One of the divided voxel planes is ON
, That is, the above surface is on (ON)
In the case of being included in the voxel in the state of, the analysis result of the voxel shape data is projected.

When one of the divided voxel planes is in the OFF state, that is, when the above-mentioned plane is not included in the ON voxel, the inclination with respect to this plane is the smallest. Select and adopt the voxel surface in the on state. In other words, the voxel plane closest to the one plane is selected and adopted. FIG. 9 shows FIG.
FIG. 9 is a plan view showing an example in which the stress distribution of each part is displayed as the voxel analysis result. In FIG. 9, the stress distribution of each voxel surface obtained as an analysis result of the voxel shape data is represented by a CAD selected from CAD shape data C.
It is displayed for the surface of the shape.

More specifically, as shown in FIG. 9, a plurality of types (here, five types) of stresses applied to a designated surface are displayed in shades, so that CAD shape data created by a designer can be displayed. , The stress distribution on the designated surface can be promptly confirmed.
Finally, the designer resets the analysis conditions of the voxel shape data while considering the stress distribution,
It is possible to easily change the design of the D shape data.

[0037]

As described above, according to the present invention,
An analysis result of second shape data such as voxel shape data existing only in the vicinity of an element selected from the first shape data such as CAD shape data is created by a first created by a designer.
Since the data is directly displayed on the shape data, the analysis result can be displayed at high speed. Therefore, the analysis conditions can be set while referring to the first shape data created by the designer, and the designer can quickly recognize the analysis result and design the first shape data. Continuation and change can be performed in a short time.

[Brief description of the drawings]

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

FIG. 2 is a block diagram showing a configuration of an embodiment according to the shape data integration analysis apparatus of the present invention.

FIG. 3 is a flowchart (part 1) for describing a processing procedure of shape data integration analysis of the present invention.

FIG. 4 is a flowchart (part 2) for explaining the processing procedure of shape data integration analysis according to the present invention;

FIG. 5 is a perspective view showing a typical example of three-dimensional CAD shape data and voxel shape data.

FIG. 6 is a plan view showing a state in which voxel shape data near an element selected from CAD shape data is displayed.

FIG. 7 is a perspective view showing a state in which voxel shape data near an element selected from CAD shape data is displayed.

FIG. 8 is a plan view showing an example in which a voxel analysis result is projected and displayed on CAD shape data.

FIG. 9 is a plan view showing an example in which the stress distribution of each part is displayed as the voxel analysis result of FIG.

[Description of Signs] 1 ... Shape data integrated analyzer 2 ... Voxel dividing means 3 ... Voxel shape data display means 4 ... First shape element selecting means 5 ... Voxel analysis means 6 ... First shape data / analysis result display means 7: First shape data reading means 8: CAD unit 9: CPU 10: Computer system for shape data integration analysis 20: Analysis program storage unit 25: Hard disk drive 30: OS unit 60: Display device 70: Mouse 75: Keyboard 82-1 to 82-3 Data storage unit 90 Storage unit

Claims (3)

[Claims] 1. Voxel dividing means for dividing three-dimensional first shape data created in a design stage by voxels and converting the data into second shape data, Second shape data display means for displaying the second shape data only in the vicinity of the portion selected from the following; and the second shape data display means displayed by the second shape data display means.
A second shape data analysis means for analyzing the shape data of the first shape data; and a first shape data analysis result of the second shape data analysis means projected onto the first shape data and displayed. And a shape data / analysis result display means. 2. a step of dividing the three-dimensional first shape data created in the design stage by voxels and converting it into second shape data; and selecting the first shape data from the first shape data. Displaying the second shape data only in the vicinity of the portion; analyzing the displayed second shape data; and converting the analysis result of the second shape data to the first shape data. Projecting and displaying the shape data. 3. A means for dividing the three-dimensional first shape data created in the design stage by voxels and converting it into second shape data, and means selected from the first shape data. Means for displaying the second shape data only in the vicinity of the portion; means for executing the analysis of the displayed second shape data; and analysis of the second shape data in the first shape data. Means for projecting and displaying on a computer-readable storage medium.