Investigation on Tonal Vibration Transmission Path Control Method Based on Multi-DOF Control

doi:10.3901/JME.2023.21.224

Abstract

Abstract: The excitation of power machinery through its support is one of the main sources of underwater low-frequency radiation for marine vessels. Aiming at the problem that the single-DOF (Degree of Freedom) centralized force control is often difficult to control the vibration transmission from the power machinery to the elastic foundation and the control performance of the radiated sound is limited, a vibration transmission path control method based on the multi-DOF vibration control of the path control unit is proposed, which can effectively cut off the transfer path of power flow. The dynamic model of the power machinery-controllable vibration isolation unit-hull system for vibration control is built based on the generalized variational principle, the multi-DOF vibration transmission mechanism is revealed through power flow analysis, and the feasibility of multi-DOF vibration transmission control is analyzed. On this basis, the global decentralized control and the local coupling control strategies are constructed, the vibration transmission path control performance based on the multi-DOF control is verified by numerical calculation and experiment. The results show that the multi-DOF path control method can effectively prevent the transmission of the power flow and achieve more significant hull vibration attenuation than the single-DOF centralized force control method.

Key words: active/passive isolation, tonal vibrations of power machinery, multi-degree-of-freedom path control, decentralized control

CLC Number:

U661
TB535

XIE Xiling, REN Mingke, ZHANG Zhiyi. Investigation on Tonal Vibration Transmission Path Control Method Based on Multi-DOF Control[J]. Journal of Mechanical Engineering, 2023, 59(21): 224-233.

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