一种非均匀环肋圆柱壳振动与声辐射性能研究  

Vibration and Sound Radiation Characteristics of a Non-Uniformly Ring Stiffened Cylindrical Shell

作　　者：王珺[1] 夏齐强[1] 林超友[1] 陈志坚[2] 

机构地区：[1]海军装备研究院,上海200235 [2]海军工程大学舰船工程系,湖北武汉430033

出　　处：《中国舰船研究》2014年第4期76-83,共8页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(51205404)

摘　　要：引入圆柱壳圆截面内运动假设,利用模态法推导非均匀环肋圆柱壳模态机械阻抗解析式;通过模态机械阻抗控制法,围绕激励力位置设置阻抗增强肋骨,构造一种非均匀环肋圆柱壳;采用FEM/BEM法对该非均匀环肋圆柱壳振动与声辐射性能进行研究,并通过模型振动试验与普通环肋圆柱壳进行对比分析。研究表明:通过增大环肋机械阻抗、合理地布置阻抗增强环肋位置构造的非均匀环肋圆柱壳,可有效降低结构振动响应和辐射噪声水平,具有较好的振声性能。In this paper, the radial modal mechanical impedance of ring stiffened cylindrical shells is de-rived with the modal analysis method and by introducing a virtual inner-motion of cylindrical shell＆#39;s sec-tion. The impedance-reinforced ring is then positioned with excitation force and a type of non-uniformly ring stiffened cylindrical shell is designed by control modal mechanical impedance. The vibration and sound radiation characteristics of the non-uniformly ring stiffened cylindrical shell are numerically calcu-lated by FEM/BEM method. Comparison between the acceleration of non-uniformly ring stiffened cylindri-cal and conventional ring stiffened cylindrical shells is conducted through model vibration tests. The re-sults show that non-uniformly ring stiffened cylindrical shells designed with improved mechanical imped-ance could refine the vibration response and reduce the line spectrum of radiation noise effectively. Over-all, the proposed shell has superior vibro-acoustic performance over other types of shells.

关 键 词：非均匀环肋 圆柱壳 模态机械阻抗 振动与声辐射 减振降噪 

分 类 号：U661.44[交通运输工程—船舶及航道工程]