Abstract：To simulate the excitation source characteristics of a hull’s noise with reality, the finite element model of a propeller-shaft-hull coupled systemwas established, and forced vibration responses of the coupled system were calculated using the mode superposition method taking an unsteady load of propeller calculated by CFD as an excitation source.The propeller’s direct radiated noise and coupled system’s vibration noise were calculated with the acoustical direct boundary element method using the surface dipole of the blade and the surface vibration velocity of the coupled system as a boundary condition parameter respectively.The numerical results show that: the sound pressure level(SPL) of the two noises increases with the increase of propeller rotating speed, and the vibration noise’s growing rate is relatively small; the SPL of coupled system’svibration noise increases with the bearing stiffness; the SPL of the two noises has the same order of magnitude and different specialties in frequency spectrum and sound pressure distribution, and it is required to take their influences into account when predicting the coupled system’s underwater radiated noise.
徐野，熊鹰，黄政. 螺旋桨激励水下壳体振动噪声数值研究[J]. 振动与冲击, 2020, 39(2): 86-91.
XU Ye，XIONG Ying，HUANG Zheng. Numerical study on the propeller induced vibration noise of an underwater hull. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(2): 86-91.
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