二维透声窗遮挡损失计算方法研究  

Research on Calculation Method of Insertion Loss of Two-dimensional Sound Transmission Window

作　　者：赖喜悦 陈美霞[1] 董文凯 LAI Xiyue;CHEN Meixia;DONG Wenkai(School of Marine and Offshore Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学船舶与海洋工程学院,湖北武汉430074

出　　处：《数字海洋与水下攻防》2023年第3期346-352,共7页Digital Ocean & Underwater Warfare

基　　金：国家自然科学基金项目“含点阵增强和空腔的加筋夹层板的水下声振特性机理研究”(5207110672)。

摘　　要：为了水下探测和声对抗,舰艇艏部舱室通常安装主动声呐设备,声呐发射声波经由透声窗向外传播,因此,开展透声窗声学特性的相关研究具有重大现实意义。为解决实际工程中透声窗透声性能计算较困难这一问题,一种用于快速预报透声窗的遮挡损失的解析–数值混合方法被提出。该方法用球谐波展开法和叠加原理求解阵列活塞声源声场,得到声激励下透声窗模型表面的声压和法向振速,进而利用COMSOL的Kirchhoff-Helmholtz模块通过再辐射的方法求解模型的遮挡损失。最后,建立了一个二维透声窗模型,分别采用解析–数值混合方法和纯有限元法计算了其全方位的遮挡损失,验证了该方法的准确性、有效性。For the purpose of underwater detection and acoustic countermeasures,active sonar equipment is usually installed in the bow compartment of ships,and the sonar-emitting acoustic waves are propagated outward through the transmissive windows.Therefore,the research on the sound transmission properties of transmissive windows is of great practical significance.In order to solve the practical problem that it is difficult to calculate the sound transmission performance of the transmissive window,a hybrid analytical-numerical method is proposed for fast prediction of the insertion loss of the transmissive window.Firstly,the spherical harmonic expansion method and the superposition principle are utilized to calculate the sound field of the array piston source and then to obtain the sound pressure and normal vibration velocity caused by the source excitation.Secondly,the method of re-radiation,included in the Kirchhoff-Helmholtz module of COMSOL,is invoked to solve the insertion loss.Finally,a two-dimensional transmissive window model is established,and its all-round insertion loss is calculated by the method of this paper and the pure finite element method,respectively,to verify the accuracy and effectiveness of the method.

关 键 词：活塞声源 阵列 遮挡损失 透声窗 

分 类 号：TN929.3[电子电信—通信与信息系统]