Accurate interface tracking processing method for coupling Lagrange mass point and Euler method

Abstract

The invention relates to an accurate interface tracking processing method coupled with a Lagrange mass point and an Euler method, and belongs to the field of computational explosion mechanics. The method comprises the steps of 1, creating a simulation model for a to-be-analyzed object, and performing initialization setting on the created simulation model; 2, calculating an artificial viscosity value, a stress tensor and a grid speed updating amount of the grid in each set time step; 3, determining a topological relation between the grids and the mass points so as to realize mapping of physicalquantities of the grids to the mass points; 4, determining the moving position of the mass point; 5, determining a topological relation between the moved mass points and the grids so as to map the physical quantities of the mass points to the grids; 6, calculating a state equation and a control equation corresponding to the simulation model; and 7, updating the physical quantities of the grids and the particles of the simulation model at the boundary of the computational domain. According to the method, the large deformation and dynamic damage process of the material is well processed, and accurate numerical simulation calculation of explosion and impact problems is effectively achieved.

Description

technical field [0001] The invention relates to an accurate interface tracking processing method coupled with Lagrange particle and Euler method, which belongs to the field of computational explosion mechanics. Background technique [0002] In engineering applications and scientific computing, computer numerical simulation has gradually become an important means to solve complex problems. Computer numerical simulation test technology has the advantages of security and confidentiality, flexible design, good repeatability, controllable environment and process, and high cost-effectiveness. It is an effective means to improve the development of weapons and ammunition and the level of prevention and rescue of explosion disasters. In addition, numerical simulation is not restricted by the external environment and conditions, and can study the changing laws of various physical quantities under different conditions, and can break through the limitations of experimental and theoreti...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the Euler method is difficult to clearly track the motion history of multi-substance interfaces, and to provide an accurate interface tracking processing method coupling Lagrange particles and Euler method

[0006] The invention combines the advantages of the Euler method for easy handling of large deformation problems and the Lagrange method for easy tracking of material deformation history, overcomes the numerical fluctuations caused by the limited number of particles in the particle method, and realizes accurate numerical simulation calculations for explosion and impact problems

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