流体与结构相互作用问题的FE-SPH耦合模拟  

Simulating fluid-structure interaction with FE-SPH method

作　　者：肖毅华[1] 韩旭[1] 胡德安[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082

出　　处：《应用力学学报》2011年第1期13-18,106,共6页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金(10902038;10972075);教育部长江学者与创新团队发展计划项目(531105050037)

摘　　要：应用有限元(FE)-光滑粒子流体动力学(SPH)耦合法模拟了具有自由表面的不可压流体与结构的相互作用问题。流体和结构分别采用SPH法和有限元法同时求解,两者在交界面处的相互作用通过接触算法进行处理。为了避免隐式计算压力,通过引入人工压缩率,将不可压流体近似为人工可压缩流体。采用FE-SPH耦合法对弹性板在随时间变化的水压作用下的变形以及倒塌水柱冲击弹性结构两个问题进行了模拟。模拟结果与实验结果以及其他已有数值结果符合良好,说明FE-SPH耦合法用于流体与结构相互作用问题的模拟是可行和有效的。Simulating fluid-structure interaction with Finite Element(FE)-Smoothed Particle Hydrodynamics(SPH) method is studied.The structure and fluid are simultaneously solved by Finite Element Method and SPH method,respectively,and interactions at interfaces between them are treated by a contact algorithm.To avoid the implicit computation of pressure,the incompressible fluid is considered to be artificially compressible by introducing artificial compressibility.With the FE-SPH method,two problems,including an elastic plate subjected to time-dependent water pressure and a collapsing water column on an elastic structure,are simulated.The obtained results show good agreements with available experimental and numerical results.This indicates that FE-SPH method is feasible and effective in simulating fluid-structure interaction.

关 键 词：流体与结构相互作用 有限元-光滑粒子流体动力学耦合 接触算法 人工压缩率 

分 类 号：O347[理学—固体力学] O351[理学—力学]