The control of unsteady bearing forces generated by propellers is of great importance for the reduction of vibration and noise of underwater vehicles. This paper is concerned with the development of a numerical method for analyzing the hydroelastic behaviors of fully coupled marine propeller and shafting system immersed in water. A three-dimensional panel method for fluid modeling combined with a finite element method for modeling of the shafting system is developed. The two sets of equations of the structural system and the fluid are strongly coupled by considering the non-penetration boundary condition on the wet surface of the propeller. A modal reduction technique is employed to determine the hydroelastic responses of the coupled fluid-propeller-shafting system, which overcomes the low numerical efficiency of the method due to the asymmetric added matrices of the propeller. The validity of the proposed method is confirmed by comparing the present results with those solutions obtained from finite element analysis. It is found that for the case of the driving force frequency close to the umbrella mode frequencies of the propeller and longitudinal mode frequenices of the shaft, the coupling of the fluid, propeller, and the shaft must be taken into account for predicting the dynamic response of the system.

螺旋桨产生的不稳定轴承力的控制对于降低水下航行器的振动和噪声非常重要。本文涉及一种数值方法的研究，该方法用于分析浸入水中的完全耦合的船用螺旋桨和轴系的水弹性行为。提出了一种用于流体建模的三维面板方法与一种用于轴系系统建模的有限元方法相结合的方法。通过考虑螺旋桨湿表面上的非渗透边界条件，将结构系统和流体的两组方程紧密耦合。采用模态折减技术确定耦合的流体-推进器-轴系统的水弹性响应，克服了由于螺旋桨的不对称加法矩阵导致的方法数值效率低的问题。通过将当前结果与从有限元分析中获得的结果进行比较，证实了所提方法的有效性。发现对于驱动力频率接近螺旋桨的伞形频率和轴的纵向模式频率的情况，必须考虑流体，螺旋桨和轴的耦合，以预测动态响应系统的。