动磁式宽带超低频水下声源理论研究

项目名称： 动磁式宽带超低频水下声源理论研究

项目编号： No.11204052

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理学I

项目作者： 卢苇

作者单位： 哈尔滨工程大学

项目金额： 25万元

中文摘要： 动磁式宽带超低频声源理论研究可以实现声源超低频宽带发射，并且声源体积小、重量轻，对于海洋环境测量、海洋资源开发、地声探测等领域具有重要的意义。本项目将动磁式驱动引入超低频声源设计领域，通过对动磁式驱动作用机理，动磁式超低频声源的分析理论以及超低频声源辐射特性进行研究，建立动磁式超低频声源的等效磁路模型，电磁参数动态微分方程组以及驱动、声源有限元模型，采用有限元技术和Matlab/Simulink系统动态仿真技术，对动磁式声源磁场特性、动态特性理论和声辐射理论进行深入研究。同时，对于动磁式超低频声源研究中存在电磁场、结构、声场等多物理场耦合问题，运用有限元多物理场耦合技术，进行动磁式超低频声源实际工况下的多物理场耦合分析，从而得到声源的各种电声特性。最后根据理论研究的结果制作声源样机。对样机的磁特性、动态特性、辐射特性进行测量并与理论分析相比较，提出动磁式宽带超低频声源的分析设计方。

中文关键词： 超低频声源；动磁式；有下元法；多物理场；动态特性

英文摘要： The broadband transmission of very low frequency sound signal would be achieved by researching on theory of moving magnet broadband very low frequency sound source. The sound source has characteristics of small size and light weight, which has great significance in marine environment measurement, underwater acoustic technology, marine resources development and so on. The moving magnet actuator was brought in very low frequency sound source by this project. The moving magnet very low frequency sound source equivalent magnetic circuit model, dynamic differential equations of the electromagnetic parameters and finite element model were established by researching on moving magnet actuator principle, theory of moving magnet very low frequency sound source and method of expanding the bandwidth in sund source.The dynamic characteristics and acoustic radiation theory of moving magnet sound source were researched in deep by Matlab/Simulink dynamic simulation technology and finite element analysis technology. At the same time, the multi-physics coupling analysis of moving magnet sound source with electromagnetic field, structure and sound field was researched by using finite element multi-physics coupling analysis technology. The electricity and sound characteristics of sound source were achieved by coupling analysis. At

英文关键词： ultra low frequency sound source；moving magnet；finite element method；multi-physics；dynamic characteristic