COUPLING-VIBRATION ANALYSIS OF ELASTIC

PLATE SUBMERGED IN VISCOUS FLUID

Wang Shaobo

(Department of Thermal Engineering, Tsinghua University, Beijing 100084)

Liu Yuanjie  Liang Xingpei  Zhao Minghao

(Advanced Manufacturing, Zhengzhou Research Institute of Mechanical Engineering, Zhengzhou 450052)

Wang Zhengwei

(Department of Thermal Engineering, Tsinghua University, Beijing 100084)

Abstract: A computational procedure is proposed to solve the interaction problem of elastic structure and fluid. Little simplification 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 continues to loop through the solid and fluid analyses until convergence is reached. Convergence in the stagger loop is based on the quantities being transferred at the fluid-solid interface. Arbitrary Lagrangian-Eulerian formulation is adopted to treat the moving interface between the fluid and the structure. The coupling algorithm is programmed based on ANSY5.6 with APDL. Two numerical examples are given. The results show the effectiveness of the procedure.

Key words: Viscous fluid   Fluid-structure interaction  Arbitrary Lagrangian-Eulerian  Vibration analysis

CLC No: O321

河南省杰出青年基金资助项目. Received 20030618, received in revised form 20040329