摘要
浅海频散特性导致声场在距离–频率平面形成干涉条纹,该干涉条纹蕴含着声源以及海底信息。本文通过降噪、滤波等方法,提取船舶辐射噪声条纹中距离域干涉准周期、波导不变量两种特征量的观测值,基于无限均匀沉积层海底模型,采用简正波计算程序理论计算上述两种特征量作为拷贝,提出一种以模拟退火法作为搜索策略新的匹配反演声源深度的方法。海试数据处理结果表明,在负跃层条件下该方法能有效反演出声源深度。
Multipath propagation in a shallow-water environment leads to coherent structure in the received field, both spatially and temporally. The interference structure contains the information of source and the geoacoustic parameters of the sediment. In this paper, the interference period of distance domain, waveguide invariant are extracted as acoustic observables after de-noising and filtering. A homogenous sediment layer model is used to compute forward estimates of the acoustic observables and the simulated annealing method is used as the search strategy. The experimental results show that the inversed parameters can be effectively used for acoustic field prediction.
引文
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