| 水中声波之间非线性作用时能量变化的分析 |
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| 引用本文： | 杨德森,兰朝凤,李思纯,时胜国,董雷.水中声波之间非线性作用时能量变化的分析[J].哈尔滨工程大学学报,2010,31(8). |
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| 作者姓名： | 杨德森 兰朝凤 李思纯 时胜国 董雷 |
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| 作者单位： | 哈尔滨工程大学水声技术实验室,黑龙江哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 为研究声波之间的变参数相互作用,以伯格斯方程为基础,用谱分解方法推导了泵波与弱信号波整倍频率相互作用后弱信号波的数学解析式,研究了弱信号波在受到泵波不同频率、幅度和初始相位干扰时的能量变化情况.研究表明:二者频率比为2时,信号能量变化最大,可达9.84 dB;随着幅度比增大,信号能量变化减小;频率比大于3时,可不考虑二者初始相位差对信号波能量变化的影响;间断距离内随着传播距离的增加,弱信号波能量变化增大.
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| 关 键 词： | 非线性作用 变参数相互作用 整倍频 谱分解法 |
An analysis of energy changes in underwater acoustics caused by nonlinear interactions |
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| YANG De-sen,LAN Chao-feng,LI Si-chun,SHI Sheng-guo,DONG Lei.An analysis of energy changes in underwater acoustics caused by nonlinear interactions[J].Journal of Harbin Engineering University,2010,31(8). |
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| Authors: | YANG De-sen LAN Chao-feng LI Si-chun SHI Sheng-guo DONG Lei |
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| Affiliation: | YANG De-sen,LAN Chao-feng,LI Si-chun,SHI Sheng-guo,DONG Lei(Acoustic Science and Technology Laboratory,Harbin Engineering University,Harbin 150001,China) |
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| Abstract: | A mathematical analysis that expressed the interaction between a pump wave and a weak signal with integral multiple frequencies was developed using spectral decomposition methods based on Burgers' equation.Changes to the energy of weak signal waves caused by the interference of pump waves at different frequencies,amplitudes and initial phases were studied.The changes in the wave energy in signals when the frequency ratio was two were greater,up to 9.84dB.When the ratio of amplitude increased,changes to the ... |
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| Keywords: | nonlinear action change parameter interaction large amplitude wave spectral decomposition methods |
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