Artificial Self-recovery Technology of Floating Raft Vibration Isolation System Based on Inerter

doi:10.3901/JME.2023.18.013

Abstract

Abstract: The conventional floating raft vibration isolation system is a double-layer "Mass-Spring-Damper" mechanical system. Based on the analogy between mechanical and electric systems, mass corresponds to capacitor with one terminal connected to the earth, and inerter is a two-terminal mechanical element corresponding to capacitor. Inerter used in the floating raft, causes the variable inertial coupling between the two layers of mass in the floating raft's dynamic model. And it greatly influences the natural frequencies and vibration isolation performance of the floating raft. Degradation or change of floating raft can change the natural frequencies and force transmission rate of the system, while the increase of the inerter's inertance can reduce the natural frequencies and influence the force transmission rate. Introducing the idea of artificial self-recovery into the floating raft, adjusting the inerter's inertance according to the monitoring result of the natural frequencies, and self-adjusting the natural frequencies to a proper range. The process is called the artificial self-recovery technology of floating raft vibration isolation system based on inerter. To verify the technical principle, experimental platform is built, and the frequency sweep experiments under harmonic excitations are conducted. The experimental results verify the feasibility of the technology.

Key words: floating raft, vibration isolation, inerter, ball-screw inerter, artificial self-recovery

CLC Number:

TH113

LI Yuehao, HU Niaoqing, CHENG Zhe, YIN Zhengyang, HUANG Liangyuan. Artificial Self-recovery Technology of Floating Raft Vibration Isolation System Based on Inerter[J]. Journal of Mechanical Engineering, 2023, 59(18): 13-21.

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