Gridless physical deformation simulation method based on regenerated nuclear particles

A simulation method and technology of regenerated cores, applied in the fields of electrical digital data processing, special data processing applications, instruments, etc.

Inactive Publication Date: 2019-05-10
上海索辰信息科技股份有限公司
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Problems solved by technology

[0007] The purpose of the present invention is to provide a meshless physical deformation simulation method based on regenerated nuclear particles, which can overcome the dependence on the mesh in the traditional method, and is suitable for structural simulation of large deformation problems

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  • Gridless physical deformation simulation method based on regenerated nuclear particles
  • Gridless physical deformation simulation method based on regenerated nuclear particles
  • Gridless physical deformation simulation method based on regenerated nuclear particles

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Embodiment

[0145] The regenerative nuclear particle method provides an effective means for understanding large deformation mechanisms. The following takes the large deformation of rubber as an example to illustrate the superiority of regenerated nuclear particles in solving the problem of large deformation.

[0146] Taking the compression of a 2D square rubber block as an example, the size of the rubber block: length a=1inch, width b=2inch; the bottom of the rubber block is fixed and restrained, and the top is subjected to a vertical compression load at a loading speed of V0=50inch / s. The rubber block material is a hyperelastic material, and the Mooney-Rivilin constitutive is selected as the material constitutive. The specific material properties are: elastic modulus E=1.384MPa, Poisson's ratio nu=0.5.

[0147] The finite element method is used to simulate the large deformation compression problem. As the rubber block is compressed, the mesh is severely distorted, and the aspect ratio in...

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Abstract

The invention discloses a gridless physical deformation simulation method based on regenerated nuclear particles, and the method comprises the following steps: carrying out the particle dispersion ofa simulation geometric model according to the particle density, and obtaining discrete particles; selecting a correction function and a window function to construct a shape function; constructing a full-field displacement field function according to the displacement and the shape function of the discrete particles in the influence domain; carrying out boundary processing by utilizing a boundary conversion method; a momentum equation, a geometric equation, a physical equation and boundary conditions are combined to construct an equivalent integral weak form equation; substituting the full-fielddisplacement field function into an equivalent integral weak form equation for solving to obtain a rigidity matrix, an equivalent internal force matrix and an external force matrix; and carrying outalgebraic solution by utilizing a center difference method to obtain deformation and stress of different time steps. Compared with a finite element method, the method can quickly and effectively simulate engineering problems such as large deformation, solves the problem that a traditional method is not convergent or needs artificial grid redrawing calculation, and is beneficial to design and optimization of engineering practical problem structures.

Description

technical field [0001] The invention relates to the field of simulation calculation in computer-aided engineering, in particular to a gridless physical deformation simulation method based on regenerated nuclear particles. Background technique [0002] Structural simulation is the process of verifying the actual structure of the project through virtual simulation, which is currently mainly realized by the finite element method (FEM). The finite element method was developed on the basis of the variational principle in the early days, and is widely used in various physical fields described by the Laplace equation and the Poisson equation. The basic idea is to approximate the structure with infinite degrees of freedom Discrete into a degree of freedom, and solve the extremum of the functional by constructing the relationship function between the degrees of freedom. [0003] Although the finite element method has made a lot of achievements in structural simulation, there are sti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 陈灏
Owner 上海索辰信息科技股份有限公司
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