1-DOF Model for Fluid-Structure-Interaction Vibration Analysis

In this paper an attempt to provide a single degree of freedom lumped model for fluid structure interaction (FSI) dynamical analysis will be presented. The can used clarify some important concept in the FSI dynamics such as added mass, stiffness, damping, wave coupling ,influence mass coefficient and critical depth . numerical results show that natural frequency decrease with increasing many parameters related .It is found phenomena become weak or strong depending on containing .The damped un free response are plotted time domain phase plane different It vibration still sinusoidal ,however it behaves modulated periodic .To justify theoretical aspects as; effects density interact shape experiment was conducted shows good agreement theory where error not exceeded 7%.