浅海阵不变量和波导不变量关系的研究

Study on the Relationship Between Waveguide Invariant and Array Invariant in Shallow Sea

阵不变量和波导不变量在浅海波导被动测距中应用广泛,对于浅海垂直阵阵不变量和波导不变量的关系,可利用简正波理论推导出阵不变量和波导不变量的关系式。利用2009年青岛崂山湾海试实验垂直阵数据提取的阵不变量,以及通过实验真实环境仿真得到的波导不变量,验证了上述关系式。阵不变量和波导不变量关系的明确,理论上可以改善阵不变量测距精度,进一步扩大两者的应用范围。

Both array invariant and waveguide invariant are widely used in passive ranging in shallow water acoustic study. In this paper, their relationship has been derived with the normal mode theory and has been verified by experiment data. The array invariant is extracted from the signals received by a vertical array in the Laoshan Bay sea test in 2009 in Qingdao, Shandong Province, and the waveguide invariant is obtained by simulation of real environment. Experiment results are in accordance with the theoretical equation. The combination of waveguide invariant and array invariant can improve the accuracy of passive ranging and enlarge the application scope of both techniques.