Vibration and sound radiation analysis of propeller-shaft-hull coupled system in a SWATH ship
Lei zhiyang1, 2 Su jinpeng1,2 Hua hongxing1,2
1. Institute of vibration, shock and noise, Shanghai Jiao Tong University, China 200240
2. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, China 200240
To analyze the propeller - shaft - hull coupled system of a SWATH catamaran ship, the coupled FEM method is employed to establish coupled water-propeller-shaft and hull-water subsystems, The mobility of the connecting points of bearings on the subsystems is computed. The bearings are modeled as flexible joints. Frequency response function based synthesis method is utilized to formulate the forced responses. Then, the acoustic response is calculated with boundary element method. The proposed method can take into consideration the elasticity of the propeller, the coupling effect of the propeller-shaft and the hull. Analysis results show that the characteristic frequencies of sound radiation power are the 1st longitudinal mode of coupled water – Propeller - Shaft and the 1st, 2nd umbrella wet modes of the propeller. The designs on reducing acoustic radiation are mainly concentrated on parameters of shaft and propeller. Meanwhile, the proposed method has high efficiency and advantages in terms of parameter analysis for shaft and propeller in a propeller - shaft - hull coupled system, which is of great significance in practical engineering.
收稿日期: 2015-10-10
出版日期: 2016-10-25
引用本文:
雷智洋1,2，苏金鹏1,2，华宏星1,2. 小水线面双体船桨-轴-船体耦合振动和声辐射分析[J]. 振动与冲击, 2016, 35(21): 17-21.
Lei zhiyang1, 2 Su jinpeng1,2 Hua hongxing1,2. Vibration and sound radiation analysis of propeller-shaft-hull coupled system in a SWATH ship. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(21): 17-21.
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