多物质流体动力学方法与结构动力学方法结合的流固耦合计算技术

Coupling Eulerian Multi-material Hydrodynamic and Lagrangian Structure Dynamic Method for Numerical Simulation of Fluid-structure Interaction

建立一种基于重叠网格空间覆盖判断的流固耦合计算技术,把流场计算的Euler多物质流体动力学计算过程和Lagrange结构动力学计算过程相结合以描述流固间的相互作用.介绍该计算技术的具体实现过程,讨论提高几何判断效率、避免耦合遗漏、流固计算时间步协调等处理技术.应用建立的流固耦合计算程序模拟爆炸容器中爆炸流场对容器内部结构、容器壳体的作用过程.计算结果表明其可以反映流场发展过程、流场结构相互作用和结构的运动变形和破坏过程.

A coupling method is developed to describe field-structure interaction.Eulerian multi-material hydrodynamic code is used to simulate fluid field.Lagrangian hydrodynamic finite element code is used to calculate response of structures.Coupling technology is made to merge these two codes.Technology to speed calculation and to avoid mismatch of fluid structure meshs and structure meshs are given.Dynamic response and shock wave propagation within an explosion containment vessel are simulated.Fluid-structure coupling algorithm is used for analyzing coupling of explosion field and structures.It indicates that the method has the ability of simulating fluidstructures interation.