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Finite element node modeling method considering contact surface topography

A technology of contact surface and modeling method, which is applied in the field of assembly and fastening, can solve the problems of poor mesh accuracy, lost data, and increased difficulty of mesh division, so as to improve the degree of rigor, the calculation speed will not be too slow, The effect of improving the accuracy of calculation

Active Publication Date: 2019-12-03
DALIAN UNIV OF TECH
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Problems solved by technology

This method not only cannot accurately show the proper shape characteristics, but also increases the difficulty of meshing the model during the interaction process of the software, and the mesh accuracy is poor, and there is a possibility of data loss.

Method used

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  • Finite element node modeling method considering contact surface topography
  • Finite element node modeling method considering contact surface topography
  • Finite element node modeling method considering contact surface topography

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Embodiment Construction

[0051] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0052] A finite element modeling method considering contact surface topography, comprising the following steps:

[0053] Step 1, most mechanical surface contact behaviors can be approximately characterized by the contact of two flat plates. The present invention uses two flat plates as an example to illustrate and establish a three-dimensional model of two flat plates in co...

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Abstract

The invention belongs to the technical field of assembly and fastening, and provides a finite element node modeling method considering contact surface topography. The method comprises the steps of firstly establishing a three-dimensional model and carrying out grid division of precision control, then adding a single-scale or multi-scale randomly-distributed or periodically-distributed morphology function to a contact surface according to model requirements, changing a height coordinate matrix of contact surface nodes, and regenerating a model with morphology. While the modeling method is provided, region division of the grids is emphasized, the number of grid nodes is guaranteed while surface topography adding is achieved, and it is guaranteed that the calculation speed is not too low.

Description

technical field [0001] The invention belongs to the technical field of assembly and fastening, and in particular relates to a finite element node modeling method considering contact surface topography. Background technique [0002] All kinds of machinery are assembled from various parts, and the surfaces that cooperate with each other are called mechanical joint surfaces. Due to the randomness and disorder of the machined surface, the contact characteristics of the mechanical joint surface will appear obvious nonlinear characteristics during the assembly process. Therefore, it is an essential part to study and optimize the assembly process to conduct mechanism research and simulation analysis on the contact behavior of the mechanical interface. For the study of the surface topography of the bonding surface, it is the current mainstream method to conduct contact analysis with finite element simulation, and the accuracy of the model depends on the mesh accuracy and modeling m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06T17/00
CPCG06T17/00
Inventor 马跃刘瑞起张伟侯博文
Owner DALIAN UNIV OF TECH
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