Abstract
A piezoelectric actuator support (PAS) is proposed to suppress lateral vibration transmission from the shaft to the hull of underwater vehicles subjected to the excitation of propeller forces. The PAS consists of eight rhombic structures with embedded piezoelectric actuators and is arranged between the stern bearing housing and the hull. The dynamic model of the shaft-PAS-hull system is developed to analyze the characteristics of power flow through the PAS. The suppression performance of acoustic radiation of the hull is analyzed to verify the effectiveness of the PAS. Numerical results have shown that the PAS is able to suppress the transmission of lateral vibration induced by the propeller forces and accordingly reduce the hull vibration as well as sound radiation.
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