The power flow through the isolators into the supporting foundation is an important parameter for evaluating a raft vibration-isolating system's performance, and is also the crucial cost function for the system's active control. In this paper, a theoretical model is developed to describe the raft vibration-isolating system. The isolating performance of this model is analyzed based on the mobility method. The vibrational power from machines into the supporting structure is studied numerically. The effects of the system's parameters on the power flow transmission are also discussed.
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