弹性板在粘性流体中的耦合振动分析  

COUPLING-VIBRATION ANALYSIS OFELASTIC PLATE SUBMERGED INVISCOUS FLUID

作　　者：王少波[1] 刘元杰[2] 梁醒培[2] 赵明皞[2] 王正伟[1] 

机构地区：[1]清华大学热能工程系,北京100084 [2]郑州机械研究所先进制造中心,郑州450052

出　　处：《机械工程学报》2004年第7期63-66,共4页Journal of Mechanical Engineering

基　　金：河南省杰出青年基金资助项目。

摘　　要：弹性板在粘性流体中的振动问题是一个典型的流固耦合问题。由于流体计算的复杂性,迄今为止,大部分的流固耦合分析都是建立在对流体充分简化的基础上,尤其是将流体视为无粘、无旋的理想流体。在计算流体动力学(CFD)的基础上,发展了一种流固耦合计算模式。流体为粘性介质。采用ALE格式处理流体和结构之间的移动界面,流体域和固体域分别独立计算,程序控制传递流体压力及固体位移和速度作为对方的边界条件,实现耦合计算。在ANSYS5.6的基础上,应用其参数化设计语言APDL编制程序,控制流体计算和结构计算,实现耦合系统的求解。进行了两个算例的计算,结果证明了该计算格式及程序的有效性。A computational procedure is proposed to solve the interaction problem of elastic structure and fluid. Little simpli-fication of fluid is carried out. The coupling algorithm solves the equations for the fluid and solid domains independently of each other. It transfers fluid forces and solid displacements and velocities across the fluid-solid interface. The algorithm con-tinues to loop through the solid and fluid analyses until conver-gence is reached. Convergence in the stagger loop is based on the quantities being transferred at the fluid-solid interface. Ar-bitrary Lagrangian-Eulerian formulation is adopted to treat the moving interface between the fluid and the structure. The cou-pling algorithm is programmed based on ANSY5.6 with APDL. Two numerical examples are given. The results show the effec-tiveness of the procedure.

关 键 词：粘性流体 流固耦合 ALE 振动分析 

分 类 号：O321[理学—一般力学与力学基础]