光滑粒子法与有限元的耦合算法及其在冲击动力学中的应用

Linking of smoothed particle hydrodynamics method to standard finite element method and its application in impact dynamics

扼要讨论了光滑粒子法的离散思想,充分利用光滑粒子法和有限元方法各自的优点,提出了一种初始时刻用有限元建模,计算过程中大变形单元自动转换为光滑粒子的耦合算法。高速碰撞的系列算例说明,耦合算法不但适宜于计算大变形冲击动力学问题,而且由于集两种方法的优点于一身,可以更高效地模拟一些高速碰撞问题,提高计算效率。

This paper gives a brief description of smoothed particle hydrodynamics （SPH） method. By taking the advantages of SPH and standard finite element methods, a coupled method is proposed, in which the computational model is made up of finite elements in initial time and the large distortional elements are converted automatically into smoothed particles. Numerical examples for hypervelocity impact by the coupled method show that the coupled method is a more efficient method to simulation of large deformation problems in impact dynamics.