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基于声压和垂直粒子速度的联合处理,估计组速度分散曲线
Guangxue Zheng1,2,3, Shengchun Piao1,2,3, Yang Dong1,2,3
1National Key Laboratory of Underwater Acoustic Technology, Harbin Engineering University, Harbin 150001, China.
JASA express letters
|December 17, 2024
概括
在切断频率以下,将正常模式分散曲线分开是具有挑战性的. 这项研究引入了一种使用联合声压和粒子速度处理来准确估计这些曲线的新方法.
科学领域:
- 水下声学 水下声学
- 海洋工程是海洋工程.
- 信号处理 信号处理
背景情况:
- 估计正常模式组速度分散曲线对于水下声学分析至关重要.
- 在分离重叠的分散曲线时,出现了挑战,特别是在水柱的切断频率以下的频率上.
- 现有的方法难以应对海洋环境中多模态声学传播的复杂性.
研究的目的:
- 开发和验证一种新的方法,用于分离和估计不同正常模式的交叉组速度分散曲线.
- 解决现有技术在低频水下声环境中的局限性.
- 为分析声学传播特征提供更准确的方法.
主要方法:
- 提出了一种新的估计方法,该方法基于声压 (P) 和垂直粒子速度 (Vz) 的联合处理.
- 利用理论分析来证明P和VZ之间的互补幅度关系,用于特定频段内的第n正常模式.
- 通过使用海上试验数据的实际应用来验证该方法的可行性.
主要成果:
- 声压和垂直粒子速度的联合处理可以有效地分离交叉的组速度分散曲线.
- 理论上确立了一个互补的振幅关系,构成了拟议估计技术的基础.
- 海上试验数据证实了开发的方法的实际可行性和准确性.
结论:
- 拟议的方法为在具有挑战性的低频水下声条件下估计正常模式分散曲线提供了可靠的解决方案.
- 声压和粒子速度的联合处理克服了单信号方法的局限性.
- 这种技术增强了对海洋波导中的声学传播的理解和分析.
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