摘要
建立了基于位移相等条件的流固耦合数值模拟程序框架,通过串联弱耦合方式对爆炸冲击波作用下流固耦合效应进行数值模拟.其中非线性固体位移场采用基于Lagrange方法描述的时域间断伽辽金有限元方法进行处理.基于修正弹簧近似的非结构动网格新技术,非定常流场采用格心格式的有限体积方法进行求解.数值模拟结果表明:该文所发展的弱耦合分析程序在流固耦合数值模拟过程中具有可靠的计算精度.同时,程序对于爆炸强间断气动冲击载荷冲击作用下固体变形引起流场的反射和叠加效应,以及流场变化引起复杂的固体响应具有良好的耦合求解能力.
In this paper, a framework for numerical modeling of fluid and structure interaction （FSI） under blast shock wave has been developed and implement by loose coupling method on the basis of the equivalence of displacement condition. The nonlinear displacement of solid field is simulated by Discontinuous Galerkin Finite Element Method （DGFEM） which is based on the Lagrange method. The flow field is computed by using the cell-centered finite-volume scheme on the assumption of the improved spring analogy. Compared to the analytical results of one-dimensional spring piston problem, the present loose coupling method shows the good performance in computational accuracy in simulating fluid-structure interaction problem. Furthermore, the program framework exhibits the good abilities in simulating the coupling interacting behavior of the reflection and superposition of flow field due to the complex solid deformations.
出处
《力学学报》
EI
CSCD
北大核心
2013年第2期283-287,共5页
Chinese Journal of Theoretical and Applied Mechanics
基金
国家重点基础发展规划(2011CB013705)
国家重大专项(2011ZX05026-02)
创新研究群体研究基金(50921001)资助项目~~
关键词
时域间断伽辽金有限元法
爆炸冲击波
有限体积法
非结构动网格
time discontinuous galerkin finite element method （DGFEM）
blast wave
finite volume method
unstructured dynamic mesh
作者简介
武文华，副教授，主要研究方向：计算力学．E-mail：lxyuhua@dlut.edu.cn
