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Automatic Generation Method of Symmetric Mesh for Integral Impeller Cycle

An integral impeller, cyclic symmetry technology, applied in instrumentation, design optimization/simulation, calculation, etc., to achieve the effect of high precision and efficiency

Active Publication Date: 2019-09-20
CHINA AVIATION POWER MACHINE INST
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for automatically generating a cyclic symmetric mesh of an integral impeller to solve the technical problem in the prior art that the finite element hexahedral three-dimensional solid unit mesh of the cyclic symmetric section of the integral impeller cannot be generated

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  • Automatic Generation Method of Symmetric Mesh for Integral Impeller Cycle
  • Automatic Generation Method of Symmetric Mesh for Integral Impeller Cycle
  • Automatic Generation Method of Symmetric Mesh for Integral Impeller Cycle

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Embodiment Construction

[0057] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0058] refer to Figure 5, a preferred embodiment of the present invention provides a method for automatically generating a cyclic symmetric mesh of an integral impeller, which is used to generate a finite element hexahedral three-dimensional solid unit mesh for a cyclic symmetric section of an integral impeller, which may be an axial flow fan blade disk, compressor blisk, centrifugal impeller, oblique flow impeller, axial flow vortex blisk, etc., such as Figure 2 to Figure 4 As shown, the integral impeller includes a blade 10 and a disc 20. The end of the disc 20 connected to the blade 10 is provided with a rim 40, and the rim 40 is connected to the blade 10 through a boundary surface 30. Th...

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Abstract

The invention discloses a cyclic symmetric mesh automatic generation method for a whole impeller. The method is used for performing finite element hexahedral three-dimensional entity unit mesh generation on a cyclic symmetric section of the whole impeller. The whole impeller comprises blades and an impeller disk. The cyclic symmetric mesh automatic generation method for the whole impeller comprises the steps of generating blade hexahedral finite element meshes of the blades; generating ruled surfaces of the blades according to the blade hexahedral finite element meshes; building an impeller disk two-dimensional geometric model of the impeller disk, and generating impeller disk two-dimensional finite element meshes according to the built impeller disk two-dimensional geometric model; mapping the impeller disk two-dimensional finite element meshes to the ruled surfaces to form ruled surface two-dimensional meshes; and generating 20 node hexahedral units of the whole impeller according to the ruled surface two-dimensional meshes. According to the method, the automation from geometric modeling to a mesh automatic generation process is realized, and the precision and the efficiency are high, so that the method is easily applied to the finite element structure optimization design.

Description

technical field [0001] The invention relates to the field of finite element mesh generation, in particular to a method for automatically generating a symmetrical mesh of an integral impeller cycle. Background technique [0002] When performing impeller finite element structural analysis, it is necessary to divide the finite element grid of the impeller. In the prior art, only four-node or ten-node tetrahedral grids (such as figure 1 shown), the steps of generating tetrahedral elements include: ①, generating the solid shape of the overall impeller; ②, intercepting the circular symmetric segment of the solid shape of the overall impeller; ③, meshing the cyclic symmetric segment Grid division. Therefore, the tetrahedron elements generated in the prior art have low precision, many steps, heavy workload, and low efficiency. It is difficult to automate the process from geometric modeling to mesh automatic generation, so it is difficult to apply in optimal design. Therefore, in o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06T15/08
CPCG06F30/23G06T15/08
Inventor 蔡显新刘建新齐思鑫
Owner CHINA AVIATION POWER MACHINE INST