半円柱形膜構造物を対象とした粘性流体中における非定常空力弾性問題 : 一様流中における膜構造物の振動解析

抄録

This paper presents a numerical analysis on unsteady aeroelastic problem for half cylinder membrane structure in onset viscous flow. For the flow field, the unsteady incompressible 2D Navier-Stokes(NS)and continuity equations are solved by a time marching numerical scheme. A Finite-Element Method(FEM)considering large deflection with membrane finite element is used to estimate the elastic characteristics of the membrane. The dynamic equations are solved by Newmark β method. At first, the kernels of these numerical methods are developed and verified, and an overview is given of the present numerical approach. The computational results are presented and discussed for a half cylinder membrane structure. The vortex-induced vibration is most essential in the present study, and in this paper the computation has been successfully implemented about a=basic model which induces large deflection and vibrations by wind force.