Experimental Investigation on Characteristics of Vibration Excitation Sources for Undersea Vehicle Tail

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 radiated 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 characteristics 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 excitation 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.