基于谱元法的加肋圆柱壳声振有源控制研究  

Active vibration and acoustic control of ribbed cylindrical shells based on the spectral element method

作　　者：张振海 邹蕙阳 朱石坚[1] ZHANG Zhenhai;ZOU Huiyang;ZHU Shijian(College of Ship and Ocean,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学舰船与海洋学院,武汉430033

出　　处：《振动与冲击》2024年第14期224-231,300,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金(51509253)。

摘　　要：加肋圆柱壳是水下航行器的主要声发生器,控制加肋圆柱壳结构振动和水下辐射噪声中的低频线谱成份,对提高水下航行器声隐身性能具有重要意义。针对复杂加肋圆柱壳结构振动响应计算、线谱有源控制次级力源作用位置和大小优化计算难题,提出了基于精细区域分解谱元法的加肋圆柱壳结构振动响应计算半解析方法,采用壳体外法线方向位移响应均方值最小的控制策略,建立了复杂加肋圆柱壳线谱有源控制理论方法。利用该方法计算分析了激励力与次级力源之间的相对位置对加肋圆柱壳结构振动和水下辐射噪声的影响,掌握了次级力源安装位置对线谱成份控制效果的影响规律。试验结果表明,该方法可有效控制加肋圆柱壳结构振动中的低频线谱成份,为水下航行器声隐身性能设计提供了新方法。The ribbed cylindrical shell is the main sound generator of underwater vehicles.It is of great significance to control the vibration of the ribbed cylindrical shell structure and the low-frequency spectral components of the underwater radiation noise to improve the acoustic stealth performance of underwater vehicles.The calculation of vibration responses of complex ribbed cylindrical shell structures,and the optimization of the position and magnitude of the secondary force of line spectrum active control is rather difficult.To address this problem,a semi-analytical method for calculating the vibration responses of ribbed cylindrical shell structures based on the fine domain decomposition spectral element method was proposed.With the control strategy of minimizing the mean-square value of the displacement response in normal direction of the ribbed cylindrical shell,a theoretical method for line spectrum active control of ribbed cylindrical shells was proposed.The influence of the relative position between the excitation force and the secondary force on structural vibration and radiated underwater sound was analyzed using this method and so,the influence of the installation position of secondary power on the control effect of line spectrum components was understood.The experimental results show that this method can effectively control the line spectrum components in the vibration of complex ribbed cylindrical shells,providing a new method for the design of the acoustic stealth performance of underwater vehicles.

关 键 词：加肋圆柱壳 线谱 结构声有源控制 区域分解 声辐射效率 

分 类 号：TB535[理学—物理]