Abstarct: Vibrations caused by vortices refer to the motion of objects created by the passage of an external current through them. In this case, the force applied to the body is oscillatory. If the object is bound, the vortex shedding frequency behind the cylinder follows the Strouhal law, but if it is mounted on an elastic substrate it starts to oscillate with the applied force. Investigations into energy extraction from the phenomenon have begun in 2005. In the present study, the flow-induced motion of a rigid cylinder connected by a spring-damper to the generator was investigated for 30000 <Re <110000. In order to improve the inductive force, changes in the cylinder geometry were performed, including the application of rough bands on the cylinder surface, then the effect of the angle of fluid collision with the cylinder on the amplitude and frequency ratio of the cylinder oscillation and their converter efficiency were investigated. Since the use of a rough surface cylinder seems more practical than the use of a cylinder with a rough bands, the purpose of this study was to investigate the amplitude and frequency ratio of the cylinder oscillation in a fully rough surface. The simulation was performed using Ansys Fluent software. Results of this simulation including cylinder amplitude ratio and cylinder oscillation frequency ratio were in good agreement with the experimental results. The results showed that by increasing the angle of fluid collision with the cylinder, the ratio of the cylinder oscillation amplitude should be reduced so that the maximum oscillation amplitude in the use of rough bands on the cylinder surface at the angle of fluid collision with the cylinder θ=0° reach 2.9D and at the angle of fluid collision with the cylinder θ=45°, Reaches 1.5D in galloping region. Also for the cylinder with fully rough surface the highest oscillation amplitude was 0.9D.