Abstract
The numerical simulation code was developed to simulate the aero-elastic phenomena of three-dimensional structures. To validate the accuracy of the code, the fluid-structure interactive simulations were carried out about circular tower elastic model. The results of the simulation were good agreement with experimental data as for the occurrence wind speed of the vortex-induced vibration that was caused by karman vortices. But the vortex-induced vibration at a high wind speed did not occurre by the simulation, so further study is neccesary about grid system and FEM modeling.