Abstract
Based on the Finite Element Method (FEM) and Boundary Element Method (BEM), the coupled vibration model of propeller-shaft-hull structure is established to analyze vibration and acoustic radiation characteristics by propeller excitations in this paper. The research shows that the vibration response peak of the hull structure is similar to the natural frequency of blade passing frequency (BPF) or stern structure by propeller excitations. The vibration and acoustic radiation is mainly caused by horizontal force and fluctuating pressure. In addition, the vibration response of ship stern structure decreases obviously with the increase of shell thickness, especially in the mid-high frequency band on 100–200 Hz. Furthermore, this study can provide a reference for ship vibration and noise control.
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