The propeller wake can cause vibrations on the rudder surface, which worsen the noise and reliability. The vibration monitoring of the rudder operating in the propeller wake with fluid-structure interaction (FSI) method is still challenging. In the present study, the structural response during propeller-rudder interaction is investigated using detached eddy simulation. Three-dimensional distributions of loads, stresses, and deformations are discussed. The leading and trailing edges exhibit the strongest deformations in opposite directions, which are S-shaped. The strongest lateral deformation occurs between the tip vortex and hub vortex regions. In the tip vortex region, the dominant lateral vibrations fluctuate at the blade passing frequency (BPF) and shaft frequency (SF). However, the 75 Hz-fluctuation becomes significant at the trailing edge of the rudder. In the hub vortex region, the lateral deformation fluctuates mainly at 75 Hz except the area near the leading edge. There are weak vibrations occurring at the natural frequencies of the rudder when the natural frequencies of the rudder are much higher than the SF and BPF. However, the plate in the propeller suffers intense vibrations at the frequencies near the natural frequencies, where the natural frequencies of the plate are close to SF and BPF.

螺旋桨尾流会导致舵面振动，从而降低噪音和可靠性。利用流体-结构相互作用（FSI）方法对在螺旋桨尾流中运行的舵进行振动监测仍然具有挑战性。在本研究中，使用分离涡模拟研究了螺旋桨-舵相互作用过程中的结构响应。讨论了载荷，应力和变形的三维分布。前缘和后缘在相反的方向上表现出最强的变形，呈S形。最强的横向变形发生在尖端涡流和轮毂涡流区域之间。在叶尖涡流区域，主要的横向振动在叶片通过频率（BPF）和轴频率（SF）处波动。然而，75 Hz的波动在舵的后缘变得很明显。在轮毂涡流区域，除了前缘附近的区域外，横向变形主要在75 Hz处波动。当舵的固有频率远高于SF和BPF时，在舵的固有频率处会发生微弱的振动。然而，螺旋桨中的板在接近固有频率的频率处遭受强烈振动，其中板的固有频率接近SF和BPF。