爆炸冲击效应数值仿真中的几项关键技术

Key Technologies of Numerical Simulation on Explosion and Impact Effect

爆炸冲击效应的数值仿真,涉及到大变形、高应变率以及材料的破坏,传统的拉格朗日或欧拉方法在解决该问题均有很大的局限性,为克服或消除这些局限性,先后发展了网格重分、ALE、CEL、FLM、SPH等方法,各有所长,但尚未完全解决;而在实际工程中,切合实际的岩土介质本构关系则是数值仿真的关键;高效并行计算与可视化则是数值仿真的必由之路。

The numerical simulation on explosion and impact effect involves large deformation, high strain rate, and material damage. And traditional computational methods, Lagrangian and Eulerian, are limited in dealing with these problems. Therefore new numerical methods such as remesh, ALE, CEL, SPH, and so on are well developed. In practical explosion and impact engineering analysis, the right rock and soil constitutive law is the key. The high effective parallel computing and scientific visualization are the only way for numerical simulation.