Abstract: Under low speeds and heavy loads, water lubricated bearings are easy to produce friction-vibration noise, which affects the comfort and acoustic stealth performance of ships. A double liner bearing structure is designed, which can achieve a breakthrough in the performance of load increase, drag reduction, vibration reduction and noise reduction of water lubricated bearings. Aiming at the bearing with sandwich liner structure under typical working conditions, the fluid-structure-acoustic two-way fluid-structure interaction dynamic model is constructed. The bearing lubrication performances considering cavitation effect and sound radiation are analyzed. The fluid-structure-acoustic characteristics and sound radiation laws of the sandwich bearing with different material combinations are investigated. The laws of rotating speed and eccentricity on deformation, stress and critical rotating speed with cavitation effect are proved. The results show that the acoustic performances of the bearing are closely related to the liner material combinations, which is of great significance to the design, development and localization of the bearing.

Key words: water lubricated bearing, sandwich liner, fluid-structure-acoustic interaction, cavitation effect, lubricity