A fluid-solid coupling high-precision numerical simulation method based on continuous medium mechanics

Abstract

The invention provides a fluid-solid coupling high-precision numerical simulation method based on continuous medium mechanics, and belongs to the technical field of fluid-solid coupling numerical simulation. The implementation method is as follows: based on an intrinsic non-oscillation (WENO) finite difference method, a joint algorithm coupled with a Level-Set method and a real virtual fluid method (RGFM), high-precision numerical simulation of fluid-solid coupling of continuous medium mechanics is realized. The WENO finite difference format can realize high-precision spatial discretization byselecting spatial template lattice points, so that the calculation precision is ensured, and the dissipation of shock waves is remarkably reduced; the Level-Set method can be used for effectively processing the complex topological structure change of the multi-substance interface; The RGFM method can effectively restrain the problem of non-physical oscillation generated by the interaction of shock waves and a material interface. The method can improve the prediction accuracy of the fluid-solid coupling process, and further solves the related engineering technical problems in the fluid-solid coupling field. The fluid-solid coupling field comprises the fields of high-speed penetration weapons, protection equipment, aerospace and mechanical engineering.

Description

technical field [0001] The invention relates to a high-precision numerical simulation method of fluid-solid coupling based on continuum mechanics, and belongs to the technical field of fluid-solid coupling numerical simulation. Background technique [0002] When the explosion occurs, it will be accompanied by the instantaneous release of huge energy, and the resulting explosion shock wave will cause catastrophic damage to the surrounding structures. Understanding the interaction mechanism between blast shock waves and structural targets is of great significance for preventing explosion disasters. At present, the main means of studying explosion and impact problems include theoretical analysis, experiment and numerical simulation. Due to the strong nonlinear dynamic behavior of explosion and impact problems, it brings great challenges to theoretical research. Although experimental research has the advantages of objectivity and other advantages, it is dangerous and requires ...

AI Technical Summary

Problems solved by technology

[0007] In view of the fact that the fluid-solid coupling numerical simulation method in the prior art adopts a low-order precision format, which affects the accuracy of the calculation results and increases the shock wave dissipation, the present invention discloses a high-precision fluid-solid coupling numerical simulation based on continuum mechanics The technical problem to be solved by the method is: realize the high-precision numerical simulation of fluid-solid coupling based on continuum mechanics, reduce the dissipation of shock waves, improve the accuracy of prediction of the fluid-solid coupling process, and then solve related engineering technical problems in the field of fluid-solid coupling

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