力-声互易在水下声源强度测量中的应用

The application of mechano-acoustical reciprocity in measurement of underwater acoustical source strength

针对水下声源强度测定问题,提出一种互易评估的测量方法。对常规测试方法和力-声互易评估方法进行理论分析,利用双层圆柱壳体模型在消声水池中进行研究和试验验证,得到无指向性水下声源的体积速度。对2种测试方法的结果进行对比,分析其适用性和准确性。结果表明,互易评估结果和常规测试结果趋势一致,差值不超过3 d B。力-声互易评估方法能够有效地测定声源体积速度,为今后的互易应用研究提供参考。

An evaluation method based on reciprocity principle was proposed to measure the underwater acoustical source strength. The theories of former measuring method and Mechano-acoustical reciprocity evaluation method were analyzed,and then studied with double-shell cylindrical model by some experiments in anechoic tank,to obtain the volume velocity of omni-directional underwater acoustical source. The measured results obtained by these two methods were contrasted,to analyze their feasibility and accuracy respectively. The results showed that the volume velocity measured by reciprocity evaluation method was similar to former measuring method,and the difference was found to be not more than 3dB.This indicated the feasibility of reciprocity evaluation method,and the study may be valuable for the applications based on the reciprocity principle.