Modeling and simulation research on flexible floating raft isolation system

Ship floating raft isolation system is an important technology which is used to improve the acoustic stealth performance of warships and submarines,and power flow is an important method of evaluating vibration isolation effect,so power flow is used as floating raft isolation system performance assessment method.The influence of raft frame and infrastructure flexibility is taken into account on the vibration isolation by the power flow method.The result indicates that the rigid and the flexible raft frame are almost consistent in the lower frequency range.The impacts from the system parameter,including equipment mass,stiffness and damping ration of upper and lower isolator and the structural damping of the raft frame and infrastructure,on vibration isolation system's power flow transfer characteristics are discussed.Adams software package is used for the simulation of the floating raft with multi rigid and flexible bodies.The results show a good agreement with the theory.