The Sound Propagation And Acoustic Radiation Of Infinite Cylindrical Shell Structure Under Hydrostatic Pressure

Given the actual vibration underwater structures in the process of joint action by the flow field and hydrostatic pressure, the paper was focused on the submerged cylindrical shell vibration in the course of being affected by hydrostatic pressure. In this paper, the coupling system under hydrostatic pressure dispersion equation was build. A theoretical analysis of the combination of vibrational energy flow and the sound radiation and dispersion of underwater model of infinite cylindrical shell structure, detailed analysis of the model to consider the effects of hydrostatic pressure on the structural vibration were given, which can be used to the reference of reducing the noise of underwater vibration-shell structure.An infinite cylindrical shell in the fluid field which under the free vibration frequency whose dispersion characteristics was studied. Flügge shell equation of motion and the Helmholtz equation were used to build hydrostatic pressure dispersion equation of coupling system, use the three-pointed iteration to solve Transcendental equations, get the spread of the wave dispersion curves. Numerical analysis in shell thickness of the different parameters of the analysis, comparison and set three submersion depth. come under the specific conditions in the frequency dispersion characteristics. Found with the increase of water depth, the corresponding wave number is rising, and so is enlarged depth, Soak deep absolute greater impact greater icon spacing curves. In this paper, through the shell vibration displacement ratio of the three waves of different frequencies of vibration shell under which actually form the coupling of several waveforms.Then, the paper underwater acoustic radiation properties of the cylindrical shell analysis Research by the underwater infinite cylindrical shell excitation of acoustic radiation. In numerical analysis, different depth, different frequencies, different wave to a few weeks, the shell thickness ratio of different parameters. the radiation properties of the cylindrical shell compared which focused on discussing the hydrostatic pressure.Given the complex nature of the solid-liquid vibration, taking into account the analysis of the energy flow characteristics, such as : the value is not sensitive phase. Vector spread to the structure, easy to understand the physics concept This paper also from the perspective of the underwater energy shell vibration analysis. He inspected the hydrostatic pressure of the existence of imported energy.