Free-form surface grid layout and finite element analysis method and system for elastic element and medium

Abstract

The invention discloses a free-form surface grid layout and finite element analysis method and system for an elastic element and a medium. The method comprises the steps of obtaining a section and a free-form surface of the elastic element; determining the lowest point on the free profile and performing segmenting by taking the lowest point as a reference; determining and obtaining a plurality ofbasic control points according to the segmentation result; enabling a basic control line to extend from the basic control point to the direction of the elastic element body, and cutting a surface domain, located on the inner side of the free profile, on the cross section into a plurality of closed or unclosed sub-surface domains through the basic control line; respectively carrying out tetrahedralmesh layout on the sub-surface domains to form a full-section mesh layout; and obtaining the overall grid layout of the elastic element according to the full-section grid layout. According to the method, grid layout can be rapidly and effectively carried out on the total cross section of the positioning node with the detail structure, the formed grid has better super-large deformation capacity and good grid distortion resistance, and analysis and calculation can be rapidly, effectively, accurately and smoothly completed.

Description

technical field [0001] The present invention relates to grid layout technology for finite element analysis of elastic elements, in particular to a free-form surface grid layout and finite element analysis method, system and medium for elastic elements, which can be applied to high-speed EMUs Positioning nodes, traction nodes, motor nodes, free-form surface folds, and ordinary spherical joint products in contact with the hyperelastic properties of foam materials and free-form surface grid deformation, etc. Grid layout and finite element analysis of various elastic elements. Background technique [0002] With the rapid development of modern rail transit, high-speed EMUs have received more and more attention from various countries and have been vigorously developed worldwide. The speed level of high-speed EMUs is getting higher and higher, and 400km / h and 600km / h are already being tested in research and development. The increase in speed level means a great change in the dyna...

AI Technical Summary

Problems solved by technology

However, when using finite element analysis technology to analyze and optimize the rubber free surface of the positioning node, it is often due to the large deformation of the rubber layer and high load conditions, the wrinkles of the rubber free surface, the superelastic properties of the rubber material and the rubber free surface Mesh deformation and contact, causing the analysis to fail to converge and the calculation to fail

Through the research, it is found that when different meshing methods are used for the rubber free surface, the convergence and analysis accuracy of the analysis are quite different. Inappropriate meshing methods lead to the inability to perform accurate, multi-round optimization analysis, and even one round of analysis fails. Difficult to carry out

[0004] Moreover, the above-mentioned technical problems also generally exist in the finite element analysis of the free-form surface of the free-form surface of the elastic element with large impact loads and high fatigue life requirements, which are not limited to positioning nodes and high-speed EMUs. Large deformation, wrinkles, and a large number of contacts Therefore, how to ensure the smooth progress of the finite element analysis of the free surface of the elastic element with large deformation, wrinkles, and a large number of contacts under the requirements of large impact load and high fatigue life has become an urgent key technical issue.

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