TY - EJOU AU - Zhao, Dan AU - Wu, Qiong AU - Gan, Minyao AU - Li, Ke AU - Ma, Wenhong AU - Wu, Qun AU - Dong, Liqiang AU - Liu, Shaogang TI - Vibration and Sound Radiation of Cylindrical Shell Covered with a Skin Made of Micro Floating Raft Arrays Excited by Turbulence T2 - Computer Modeling in Engineering \& Sciences PY - 2023 VL - 134 IS - 3 SN - 1526-1506 AB - To reduce the vibration and sound radiation of underwater cylindrical shells, a skin composed of micro floating raft arrays and a compliant wall is proposed in this paper. A vibroacoustic coupling model of a finite cylindrical shell covered with this skin for the case of turbulence excitation is established based on the shell theories of Donnell. The model is solved with the modal superposition method to investigate the effects of the structural parameters of micro floating raft elements on the performance of reducing vibration and sound radiation of the cylindrical shell of this skin. The results indicate that increasing the stiffness ratio, damping ratio, mass ratio, or decreasing the interval between micro floating raft elements can improve the vibration and sound radiation reduction performance of this skin over the frequency range 0~2000 Hz. Moreover, the mean quadratic velocity level and sound radiation power level of the finite cylindrical shell with this skin can be reduced by 12.00 dB and 9.65 dB respectively compared to the finite cylindrical shell with homogeneous viscoelastic coating in the frequency range from 0~2000 Hz, implying a favorable performance of this skin for reducing the vibration and sound radiation of cylindrical shells. KW - Finite cylindrical shell; vibration and sound radiation; noise reduction; turbulent pulsating pressure; micro floating raft DO - 10.32604/cmes.2022.021026