Vibration transmission control method of propulsion shafting system based on active supports

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (9) : 120-124.

ZHU Yueyue1, HUANG Zhiwei3, XIE Xiling1, ZHANG Zhiyi1,2

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Abstract

Here, in order to reduce transmission of lateral vibration of a propulsion shafting system under excitation of propeller, a control method to use active supports was proposed.Active supports were arranged at the position of stern bearing in vertical and horizontal directions to connect stern bearing and hull.Electromagnetic actuator was installed in active supports, and the direct velocity feedback control strategy was adopted.Propeller’s lateral excitation transmitted to hull through stern bearing support was suppressed to reduce hull surface vibration and sound radiation induced by lateral pulse force of propeller.The propeller shafting-active support-hull coupled dynamic model and the hull sound radiation computation model were established.The simulation results showed that active supports have obvious suppression effect on sound power of hull surface under excitation of propeller.The theoretical analysis results were verified with tests.The test results showed that orthogonal active supports can attenuate vibration velocity on hull surface in normal direction caused by shaft end excitation.

Key words

lateral vibration / active support / velocity feedback

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ZHU Yueyue1, HUANG Zhiwei3, XIE Xiling1, ZHANG Zhiyi1,2. Vibration transmission control method of propulsion shafting system based on active supports[J]. Journal of Vibration and Shock, 2021, 40(9): 120-124

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