摘要
基于预测-多步校正方法提出了流固耦合同步交替求解方法.采用ALE描述流固耦合问题.基于SUPG有限元对流体动量方程进行空间离散,以消除对流项引起的数值振荡.时间域上的积分采用预测-多步校正(predictor-multicorrector)方法.对流体和结构同时进行预测,在多步校正的过程中对流体和固体域动力学方程进行交替求解,从而在时间上达到同步推进.基于上述同步交替法,编程计算了流体-弹性板耦合作用问题,取得了良好的数值计算结果.
Based on predictor-multicorrector method,a new method for fluid-structure interaction problem is presented in this paper,which is named the synchronized and staggered solution method.With ALE description for FSI problems,SUPG finite elements method for fluid momentum equations is chosen to eliminate numerical spurious oscillations.Then predictor-multicorrctor method is used to do the time integration.The variables of fluid and structure are predicted simultaneously in the predictor,and their governing equations are solved staggeringly in the＂multicorrector＂.In this way the variables of fluid and structure could be synchronized.A computational procedure using above algorithm is developed to solve the vibration problem of an elastic plate in the flowing fluid.
出处
《力学学报》
EI
CSCD
北大核心
2010年第5期856-862,共7页
Chinese Journal of Theoretical and Applied Mechanics
关键词
ALE
SUPG有限元
流固耦合
同步交替求解
整体法
ALE descriptions
SUPG finite element
fluid-structure interaction
synchronized and staggered solution
entire solution
