Abstract
The structure subjected fluid force in narrow passage is sometimes exposed to unstable vibration. We consider the availability of this fluid force and try to develop the efficient driving mechanism. The driving body in narrow passage is modeled as a link mechanism. Fluid-structure coupled equations are derived based on the equation of continuity and the Navier-Stokes equations. Through these equations, fluid- structure coupled modes in the system are obtained. Considering the mechanism for unstable vibration, efficient driving force is generated from small input torque, which can make efficient driving.
