Analysis on spectra of hydroacoustic field in sonar cavity of the sandwich elastic wall structure

[摘要] In this paper, the characteristics of the mechanical self - noise in sonar array cavity are studied by using the elastic flatbed - filled rectangular cavity parameterization model. Firstly, the analytic derivation of the vibration differential equation of the single layer, sandwich elastic wall plate structure and internal fluid coupling is carried out, and the modal method is used to solve it. Finally, the spectral characteristics of the acoustic field of rectangular cavity of different elastic wallboard materials are simulated and analyzed, which provides a theoretical reference for the prediction and control of sonar mechanical self-noise. In this paper, the sandwich board as control inside the dome background noise of a potential means were discussed, the dome background noise of qualitative prediction analysis and control has important theoretical significance.

[发布机构] Key Laboratory of Shipping Noise and Vibration, Naval University of Engineering, Wu'han; 430033, China^1;School of Mechanical Engineering, Shandong University, Ji'nan; 250061, China^2

[关键词] Analysis and controls;Parameterization model;Prediction and control;Qualitative predictions;Rectangular cavity;Spectral characteristics;Vibration differential equations;Wallboard materials