| 韩梅,储泽国,笪良龙.利用浅海声场干涉条纹反演海底参数方法研究[J].,2014,33(5):385-390 |
| 利用浅海声场干涉条纹反演海底参数方法研究 |
| Geoacoustic characterization of shallow-water based on interference patterns |
| 投稿时间：2013-07-17 修订日期：2014-08-31 |
| 中文摘要: |
| 浅海频散特性在距离-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,提取条纹中距离域干涉准周期、波导不变量以及去扩展衰减系数(不考虑扩展损失后接收到噪声级随距离的衰减程度)三个观测量,以无限均匀沉积层为海底模型,采用模拟退火法作为搜索策略,提出一种新的反演方法。海试数据处理结果表明,该方法反演所得参数能有效地用于声场预报。 |
| 英文摘要: |
| 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, and the slopes of the overall transmission loss(regardless of the cylindrical spreading) 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 method of inversion obtained parameters can be effectively used for acoustic field prediction. |
| DOI：10.11684/j.issn.1000-310X.2014.05.002 |
| 中文关键词: 干涉准周期,波导不变量,去扩展衰减系数,反演 |
| 英文关键词: interference period, waveguide invariant, the slopes of the overall transmission loss, inversion |
| 基金项目: |
|
| 摘要点击次数: 2800 |
| 全文下载次数: 1982 |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
