At present, although there are a large number of studies on the hydroelastic analysis of ship propellers, almost all of them neglect the shaft, thus ignoring the influence of the structural coupling effect between the propeller and the shaft. Therefore, considering this coupling effect, a new hydrodynamic analysis model of propellers is established by using the boundary element method (BEM) coupled finite element method (FEM). And then the model is verified by some experiments on the water tunnel test bench. Finally, based on this model, the influence of the structural coupling effect on propellers' hydroelastic performance is mainly studied. The results show that when the structural coupling effect is ignored, the relative errors of the first-order jellyfish mode of the blade, the dynamic stress at the blade root, and the longitudinal bearing force of the propeller are as high as 22.78%, 28.04%, and 20.37% respectively. Therefore, the structural coupling effect between the propeller and the shaft should be considered when analyzing the propellers’ hydroelastic response. Further, when designing the propeller-shaft system, this coupling effect can also be fully utilized to reasonably match the parameters of the propeller and the shaft to optimize the hydroelastic performance of propellers.

目前，尽管对船舶螺旋桨进行水弹性分析的研究很多，但几乎都忽略了轴，因此忽略了螺旋桨与轴之间的结构耦合效应的影响。因此，考虑到这种耦合效应，采用边界元法（BEM）耦合有限元法（FEM）建立了新型螺旋桨水动力分析模型。然后在水隧道试验台上通过一些实验验证了该模型。最后，基于该模型，主要研究了结构耦合效应对螺旋桨水弹性性能的影响。结果表明，当忽略结构耦合效应时，叶片一阶水母模式的相对误差，叶片根部的动应力，螺旋桨的纵向承载力分别高达22.78％，28.04％和20.37％。因此，在分析螺旋桨的水弹性响应时，应考虑螺旋桨与轴之间的结构耦合效应。此外，在设计传动轴系统时，也可以充分利用这种耦合作用来合理地匹配传动轴和轴的参数，以优化传动轴的水弹性性能。