| Inversion of acoustic mode coupling coefficient matrix |
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| 作者姓名： | LIU Jinzhong WANG Ning GAO Dazhi |
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| 作者单位： | [1]Department of Physics, Weifang University Weifang 261061 [2]Department of Physics, Ocean University of China Qingdao 266071 |
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| 基金项目： | 国家自然科学基金;潍坊大学自然科学基金 |
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| 摘 要： | It is found that the normal mode amplitude time series consist of multi-frequency component by analyzing the structure of acoustical signal when internal wave propagation exists, and each frequency is the product of internal wave speed and the normal mode wave number difference between acoustical receivers and source. The amplitude of each component is proportional to the acoustic mode coupling coefficient. The structure of the normal mode coefficient time series is still complex even the internal waves do not reshape when they propagate from the acoustical receivers to the source. A method is presented to compute the AMCCM by the feature of IWs' motion and the relation between the AMCCM and the acoustical signal fluctuation amplitude. The IWs data measured in the 2001 Asia experiment (ASIAEX2001) is used to check the accuracy of this method by numerical simulation. It is show that the method is accurate to compute the AMCCM.
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| 关 键 词： | 声模态耦合系数 矩阵 海洋 内波 声学信号波动 |
| 修稿时间： | 2006-04-18 |
Inversion of acoustic mode coupling coefficient matrix |
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| Authors: | LIU Jinzhong WANG Ning GAO Dazhi |
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| Abstract: | It is found that the normal mode amplitude time series consist of multi-frequency component by analyzing the structure of acoustical signal when internal wave propagation exists, and each frequency is the product of internal wave speed and the normal mode wave number difference between acoustical receivers and source. The amplitude of each component is proportional to the acoustic mode coupling coefficient. The structure of the normal mode coefficient time series is still complex even the internal waves do not reshape when they propagate from the acoustical receivers to the source. A method is presented to compute the AMCCM by the feature of IWs' motion and the relation between the AMCCM and the acoustical signal fluctuation amplitude. The IWs data measured in the 2001 Asia experiment (ASIAEX2001) is used to check the accuracy of this method by numerical simulation. It is show that the method is accurate to compute the AMCCM. |
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