Damping layout optimization for ship's cabin noise reduction based on statistical energy analysis
WU Weiguo1, WEI Jiezheng1, LIN Yongshui2, FAN Mingwei3, Gan Jin1
1. School of Transportation, Wuhan University of Technology, Wuhan 430063, China;
2. Department of Mechanics and Engineering Structure, Wuhan University of Technology, Wuhan 430070, China;
3. China Ship Development and Design Center, Wuhan 430064, China
An optimization analysis study concerning the damping control of ship's cabin noise was carried out in order to improve the effect and reduce the weight of damping. Based on the Statistical Energy Analysis (SEA) method, a theoretical deduction and numerical analysis of the first-order sensitivity analysis of the A-weighted sound pressure level concerning the damping loss factor of the subsystem were carried out. On this basis, a mathematical optimization model was proposed and an optimization program developed. Next, the secondary development of VA One software was implemented through the use of MATLAB, while the cabin noise damping control layout optimization system was established. Finally, the optimization model of the ship was constructed and numerical experiments of damping control optimization conducted. The damping installation region was divided into five parts with different damping thicknesses. The total weight of damping was set as an objective function and the A-weighted sound pressure level of the target cabin was set as a constraint condition. The best damping thickness was obtained through the optimization program, and the total damping weight was reduced by 60.4%. The results show that the damping noise reduction effect of unit weight is significantly improved through the optimization method. This research successfully solves the installation position and thickness selection problems in the acoustic design of damping control, providing a reliable analysis method and guidance for the design.
吴卫国, 魏杰证, 林永水, 范明伟, 甘进. 基于统计能量分析的船舶舱室阻尼降噪布置优化[J]. 中国舰船研究, 2017, 12(4): 41-48.
WU Weiguo, WEI Jiezheng, LIN Yongshui, FAN Mingwei, Gan Jin. Damping layout optimization for ship's cabin noise reduction based on statistical energy analysis. Chinese Journal of Ship Research, 2017, 12(4): 41-48.
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