超磁致伸缩复合智能消声瓦主动回声抑制研究

项目名称： 超磁致伸缩复合智能消声瓦主动回声抑制研究

项目编号： No.11204010

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： 唐俊

作者单位： 天津大学

项目金额： 26万元

中文摘要： 从稀土超磁致伸缩材料的独特性能入手，结合水声换能器设计理念，研究薄型智能主动消声瓦材料，满足水下目标主动回声抑制系统中的声学覆盖层（即智能消声瓦）所必须的耐高压、低频工作、高作动效率、厚度薄、质量轻等要求。采用有限元方法对线性稀土超磁致伸缩换能器的结构和性能进行仿真与优化，将线性稀土超磁致伸缩换能器与轻质辐射面板相结合，采用固体激励发声的方法，构建厚度小于5cm且具有较大辐射声功率的薄型智能消声瓦作动材料。用优化的机电设计和高的低频作动效率设计主动消声瓦。采用嵌入式面板结构的方式将9块智能材料敷设在水下目标大试样模型表面，构建分布式主动回声抑制系统，研究多通道有源控制算法，在高压消声水池中进行水下目标大试样主动回声抑制实验。研制新的主动声学覆盖层复合材料和主动回声控制系统，为水下目标回声抑制提供新的技术途径。

中文关键词： 水下大型目标；有源控制；自适应系统；智能材料；超磁致伸缩材料

英文摘要： On the unique properties of GMM(Giant Magnetostrictive Material) and underwater acoustic transducer design, the thin intelligent active anechoic tile materials can be developed. Requirements such as high voltage, low frequency, high actuating efficiency, thin thickness and light weight can be satisfied in acoustic layer (i.e. intelligent anechoic tile) of underwater target echo suppression initiative system. The linear magnetostrictive transducer structure and performance can be simulated and optimized with the finite element theory. Using solid incentive sounding method, linear magnetostrictive transducer can be combined with light radiation panel. And the thin intelligent anechoic tile actuating materials with large acoustic radiation power can be constructed; whose thickness is less than 5CM. The active anechoic tile is designed with optimization of mechanical design and electrical equipment and the high frequency actuating efficiency. The 9 intelligent materials are laid in underwater large specimen surface in the way of embedded panel. Distributed active echo suppression system is constructed, and multi channel active noise control algorithm is studied. Active echo suppression experiment of underwater large specimen is done in pressure anechoic tank. New active acoustic layer composites can be invented, whi

英文关键词： underwater large-scale target；active noise control；adaptive system；smart material；giant magnetostrictive material