To investigate vibration and noise of undersea vehicle tail, experiment was conducted in a large circulating water channel to understand the characteristics of vibration excitation source of the tail. The vibration response and ra-diated noise of the undersea vehicle tail shell were measured under the impacts of three main vibration excitation sources, i.e., the propulsion shafting, the hydraulic gear pump, and the propeller rotor. Then, the shell vibration response charac-teristics under the impact of each excitation source and the contribution of each excitation source to the vibration and radiated noise level were compared and analyzed. Results indicate that the hydraulic gear pump is the principal excita-tion source of the undersea vehicle tail, the propeller rotor is ranked second, and the propulsion shafting is ranked third. This study may provide a reference for research of vibration control technology of undersea vehicle tail.%针对水下航行器尾段振动噪声问题,在大型循环水槽中开展了试验模型尾段振动激励源特性试验研究,分别测试了在推进轴系、液压齿轮泵以及推进器转子3种最主要激励源作用下的试验模型尾段壳体振动响应及辐射噪声,比较分析了各激励源作用下壳体的振动响应特性以及各激励源对壳体振动及声辐射的贡献度,试验结果表明:水下航行器尾段最主要的激励源为液压齿轮泵,推进器转子次之,推进轴系激励最小.其试验结果可为水下航行器尾段振动控制技术研究提供参考.
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