Study of Water Surface Acoustic Waves Excited by Acoustic Radiation from Underwater Cylindrical Shells

The study of water surface acoustic waves excited by the acoustic radiation from underwater acoustic source is of great significance for cross-media underwater sound source detection in the air. In order to study the characteristics of water surface acoustic waves excited by the acoustic radiation from underwater acoustic source, the theoretical solution of water surface acoustic wave excited by the spherical acoustic wave radiation from underwater steady point source is derived based on underwater sound propagation theory, the pulsating spherical point source is used as an numerical analysis example to verify the model according to the finite element method, and the corresponding measurement experiments are designed and conducted to verify the horizontal attenuation law and the influence of sound source depth. Based on the acoustic-structure coupling finite element method, the influences of sound source parameters, such as sound source depth, and environmental parameters on the water surface acoustic wave induced by the acoustic radiation from underwater cylindrical shell are studied. The research results indicate that the amplitude of seawater surface wave excited by the cylindrical shell sound source in a semi-free field environment is much greater than that of other frequencies under certain vibration modes corresponding to the natural frequencies. The seabed and rough sea surface have an impact on the amplitude of water surface waves. Under the excitation of load, the amplitude of water surface waves excited by the sound radiation from underwater cylindrical shell in finite water depth is positively proportional to the depth of submergence within 3 times the radius of the cylindrical shell and beyond 20 times the radius, while other ranges are inversely proportional to the depth of submergence. © 2024 China Ordnance Industry Corporation. All rights reserved.