【摘要】 推导了一种基于ALE描述弱可压缩液体与结构非线性耦合求解的分步有限元数值计算法,速度与压力使用同阶线性插值,并对耦合系统的竖动响应进行了分析。通过二维黏性流体大晃动问题实例计算,验证了该法简便、可行有效。更多还原

【Abstract】 This paper establishes coupled finite element equations of coupling system solved by iteration method.Thus,a new ALE fractional steps finite element method which could solve nonlinear slightly compressible fluid-solid coupling system is presented.This method is useful because one can use the same linear interaction functions for both velocity and pressure.To confirm the effectiveness of the method,large-amplitude two-dimensional viscous fluid sloshing in a tank is simulated and good agreement is obtained in comparison with available results.Then,the method is applied to the study of dynamic response of slightly compressible fluid-tank coupling system under vertical excitation.更多还原