乱流場における流体・構造体連成振動解析手法の開発 : 第1報,定式化と強制振動の解析

抄録

A new approach to simulate flow-induced vibration is introduced. A fully coupled analysis of fluid-structure interaction has been realized in a turbulent flow field using the following calculational steps : a) solving turbulent flow by a direct simulation method where the ALE (arbitrary Lagrangian-Eulerian)-type approximation is adopted to take account of structural displacements ; b) estimating fluid force on structures by integrating fluid pressure and shear stress ; c) calculating dynamic response of structures and determining the amount of displacement ; d) re-generating curvilinear grids for new geometry using the boundary-fitted coordinate transformation method. Vortex-induced vibration of a circular cylinder in a cross flow were successfully simulated and the synchronization phenomena between Karman-vortices and cylinder vibrations were clearly observed.