Distributed energy absorbing composite structure for sonar dome design

In this paper, for the demand of low-frequency hydrodynamic noise control in submarine sonar dome, based on the coupled vibration equations of the plate and acoustic cavity, the hydrodynamic self-noise calculation model of the multi-layer composite plate was established by using the acoustic vibration transfer matrix, modal expansion method and wave vector-frequency spectrum of turbulence boundary layer pressure. According to the analysis of dynamic vibration absorption characteristics, the vibration and noise equations of the plate under the control of distributed energy absorption unit were formed, and the hydrodynamic self-noise of the distributed power absorption composite sonar domes was evaluated. The hydrodynamic self-noise reduction effect was verified through the large cavitation channel tests, providing technical support for the design of advanced low-noise sonar domes. © 2024 China Ship Scientific Research Center. All rights reserved.