水声声管低频矢量声场校准原理及方法

项目名称： 水声声管低频矢量声场校准原理及方法

项目编号： No.11474075

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 陈洪娟

作者单位： 哈尔滨工程大学

项目金额： 96万元

中文摘要： 水声声管在低频水声测量中应用十分广泛，不仅可以用来校准低频水声换能器，还可以用作水声材料及其构件的声学参数测量。现有的水声声管测量方法：脉冲法、驻波法、行波法，测量原理都是基于刚性圆管波导理论建立的，并且主要仅针对声压测量。而实际上声管都是弹性体（特别是低频时），声学刚性条件很难在工程上实现，且随着水声研究工作的发展，近年更加大了对质点振速测量的需求，因此导致这些测量方法的理论分析模型和实际工作要求不相符，测量结果将有较大的误差，甚至失效。 　　本项目将通过对声波在弹性圆管波导中有无被测物时的传播理论分析，讨论其对波导内声场分布所带来的畸变，和对声压与振速测量结果的影响；另外，并通过实验对理论和仿真结果进行验证，从而为改进和提高水声声管低频测量技术提供有效的支撑。

中文关键词： 矢量声场；弹性圆管波导；低频；校准；矢量水听器

英文摘要： Underwater acoustic tube is widely applied in low frequency underwater acoustic measurement. It not only can be used for calibrating low frequency underwater acoustic transducer, and also can be used for measuring the acoustic parameter of underwater acoustic material and accessories. The measurement theory of the existing underwater acoustic tube measurement methods including pulse method,standing wave method and traveling wave method are all based on the rigid circular tube waveguide theory, and only mainly measuring pressure. But wave tubes are elastomers (especially for low frequency), acoustic rigid condition is difficult to achieve in practical engineering. Recently, with the development of research on underwater acoustic,the need of measurement on particle velocity is larger so that the theoretical analysis model of measurement methods is different from the actual work requirement. So, the results of measurement have a lot errors or even useless. This project will discuss the distortion of the sound field in wave guide and the influence of the measurement result of sound pressure and velocity caused by the analyte through analyzing the sound wave propagation theory in elastic circular tube wave guide with or without analyte; besides, through verifying theory result and simulation result we can give advices for improving the underwater sound tube low frequency measurement technology.

英文关键词： acoustic vector field;elastic tube waveguide;low frequency;calibration;vector hydrophone