Dynamic analysis of water-lubricated marine stern tube bearing is incompatible with that of ordinary oil-lubricated bearing due to the deformation of compliant bushes and non-negligible roughness effects. A modified bearing dynamic analysis model embracing roughness and dynamic characteristics of a non-metal bush is proposed. Based on the model, Reynolds equations of perturbed pressures of water film considering roughness, deformation, and misalignment simultaneously are derived for the first time and solved by coupling the finite difference method and the finite-element method. The results show that dynamic coefficients are enhanced due to roughness when the minimum film thickness ratio exceeds a threshold around 2. The roughness effect is debilitated but the valid range of roughness is extended when bush deformation is considered. Additionally, dynamic coefficients of rougher bearing become obviously smaller than those of smoother bearing as the misalignment angle grows.

水润滑船尾管轴承的动态分析与普通油润滑轴承不兼容，这是由于顺应性衬套的变形和不可忽略的粗糙度影响所致。提出了一种包含非金属衬套粗糙度和动力学特性的改进轴承动力学分析模型。在该模型的基础上，首次推导了同时考虑到粗糙度，变形和不对准的水膜摄动压力的雷诺方程，并通过有限差分法和有限元法相结合求解。结果表明，当最小膜厚比超过2左右的阈值时，由于粗糙度而增加了动态系数。考虑到衬套变形，粗糙度效果变弱，但有效粗糙度范围扩大了。此外，