The simulation study on vibration and impact control of the complex vibration isolation system

In an effort to mitigate the problem of the power plant vibration isolation system experiencing vibration and impact during the voyage,an integrated control system of semi-active vibration absorption was presented.The control of vibration and impact was achieved by regulating operating frequency of the semi-active vibration absorber.The regular pattern of impact resistance of complex vibration isolation system was examined utilizing the dynamic vibration absorber method.The system impact response was solved using the step-by-step integration method and the influence of resistance impact was discussed when the parameters changed,such as installation position,mass,stiffness and damping of the vibration absorber.If present,then optimization methods were proposed.The simulation results indicate the effect of impact resistance is better when the vibration absorbers are installed on different devices,as opposed to the effect when only installed on the floating raft or a device.The impact attenuation rate on time domain of device A and B can reach up to 27.3% and 36.7%,respectively,when the parameters of vibration absorber are optimized legitimately.