部分敷设阻尼材料的水下结构声辐射分析  

Sound radiation analysis for a submerged structure with a viscoelastic damping layer partially covered

作　　者：王献忠 孙龙泉[1] 邱忠辉[1] 郑律[1] 

机构地区：[1]哈尔滨工程大学船舶工程学院,哈尔滨150001

出　　处：《振动与冲击》2012年第18期122-127,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(批准号50779007);中央高校基础科研(HEUCF110119)

摘　　要：基于统计能量分析(SEA)方法,分析了流场中部分敷设阻尼材料的有限长圆柱壳的声辐射特性,并进行了相应的声辐射试验测试。通过仿真结果与试验对比,验证了SEA方法在计算敷设阻尼结构的圆柱壳声辐射特性问题的有效性。在此基础上开展了部分敷设阻尼材料的水下结构辐射问题研究,分析了阻尼层敷设比例对水下结构振动与声辐射的影响;讨论了结构损耗因子对阻尼层减振降噪效果的影响。研究表明结构损耗因子对局部敷设于水下结构的阻尼层降噪效果有很大影响,为潜艇声学优化设计提供参考。Based on statistic energy analysis （SEA） method, sound radiation characteristics of a submerged finite cylindrical shell with damping layers were analyzed. The validity of SEA method was proved by comparing the simulation results with the test results of a cylindrical shell model. Then, the sound radiation pressure of a submerged structure partially covered with a damping layer was studied. The influences of different laying rates and damping loss factor on vibration and sound radiation of the submerged structure were analyzed. The study showed that the structural loss factor has a great effect on noise reduction of the submerged structure partially covered with a viscoelastic damping layer.

关 键 词：阻尼层 声辐射 损耗因子 统计能量法 敷设比例 

分 类 号：U674.76[交通运输工程—船舶及航道工程]