Intelligentized method for mesh generation of CAE software system

A meshing and software system technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as difficulty in applying finite element models

Inactive Publication Date: 2007-08-08
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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  • Application Information

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Problems solved by technology

However, these algorithms are generally only for a certain special sit

Method used

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  • Intelligentized method for mesh generation of CAE software system
  • Intelligentized method for mesh generation of CAE software system
  • Intelligentized method for mesh generation of CAE software system

Examples

Experimental program
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Embodiment 1

[0029] Embodiment 1: As shown in Fig. 8 and Fig. 9, valve structure analysis: first establish a finite element model, as Fig. 8 is a line diagram of the structural model of the valve, the structure is an assembly model, and is composed of three parts of entities: the upper bonnet , the middle valve body and the lower main cavity; apply constraints and loads to the model, a vertical downward surface load acts on the upper end of the valve cover, and apply fixed constraints on both sides of the lower cavity; select the corresponding part for each part according to the actual situation The material parameters, and then the finite element mesh is divided to generate the finite element structure mesh diagram, as shown in Figure 9.

[0030] Next, select the corresponding structural analysis function - static analysis. Finally, solve the calculation to obtain the stress cloud diagram of the structure. In the post-processing program, the stress magnitude can be displayed in different ...

Embodiment 2

[0031]Embodiment 2: As shown in Figure 10 and Figure 11, the structure of the horizontal gearbox: first, the establishment of the finite element model, as shown in Figure 10 is a wireframe diagram of the structural model of the horizontal gearbox, the structure is an assembly model, consisting of two parts, the left and the right The constraints and loads are imposed on the structure, and the gear meshing force is applied to the bearing round holes on the left and right walls of the gearbox, which is decomposed into axial load and radial load, and fixed constraints are imposed on the round hole surface of the anchor bolts at the bottom of the gearbox; and then The finite element mesh is divided to generate a finite element structure mesh diagram, as shown in Figure 11, the constrained aperture is a feature smaller than the subdivision size, and the CAE system automatically identifies small features and automatically intelligently encrypts the area. Next, select the correspondin...

Embodiment 3

[0032] Embodiment 3: as shown in Fig. 12 and Fig. 13, automobile rear axle model: at first the establishment of finite element model, Fig. 12 is the wireframe diagram of automobile rear axle model, carries out modal analysis to structure, imposes constraint on structure, automobile Constraints are imposed on the semicircular surface at the left end of the rear axle model to constrain the axial, radial and tangential displacements in the coordinate system; then the finite element mesh is divided to generate a finite element structure mesh diagram, as shown in Figure 13, which is less than At the feature of the subdivision size, the CAE system automatically recognizes the small feature and automatically encrypts the area intelligently. Next, select the corresponding structure analysis function - frequency analysis. Finally, solve and analyze to obtain the multi-order natural frequency and mode shape diagram of the structure. In the post-processing program, the too small value of...

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Abstract

The invention is an intelligent computer-aided engineering software system, which is an intelligent method that can be applied to machinery, automotive, construction, water conservancy, transportation, energy, aviation, aerospace, shipbuilding and other areas for structural design and analysis of CAE software system mesh generation. The first step is finite element modeling; the second step: mesh generation and intelligent encryption; imposing constraints; imposing load; reducing the burden of users to study, as well as boosting the request of the success rate of procedures automatically partition because there is no second algorithm as substitute. The automatic mesh, the ideal that it pursuit is 'one-button', namely only a mouse click on partition menu is needed, there is no need for any of the other operating.

Description

technical field [0001] The invention belongs to an intelligent computer-aided engineering software system, which is applicable to the intelligentization of CAE software system grid subdivision for structural design calculation and analysis in the fields of machinery, automobiles, construction, water conservancy, transportation, energy, aviation, aerospace, ships, etc. method. Background technique [0002] A variety of algorithms have been proposed in the field of mesh automatic subdivision, such as region mapping method, wave front filling method and so on. But these algorithms are generally only for a certain special situation, it is difficult to apply to the general finite element model. Over the past 10 years, well-known international CAE software manufacturers have adopted the Delaunay algorithm, because the Delaunay algorithm has a solid mathematical foundation and can be applied to general finite element 3D models. For some non-universal algorithms proposed earlier, ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 张帆沈霖
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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