基于特征的最大对于海底的地质物理特性)
D P Knobles1, William Hodgkiss2, Jason Chaytor3
1Platt Institute of Nuclear Physics, P.O. Box 27200, Austin, Texas 78755, USA.
The Journal of the Acoustical Society of America
|June 3, 2024
概括
海底的地质物理特性影响声信号干扰. 基于特征的声学数据反转揭示了具有特定孔隙性的沙海底,有助于声学传播预测.
科学领域:
- 海洋声学 海洋声学
- 地质物理学 地质物理学
- 逆转方法是一种逆转方法.
背景情况:
- 海洋中的声学传播受到海底特性的影响.
- 海底反射会在声信号中产生干扰模式.
- 了解这些模式有助于地质物理特征.
研究的目的:
- 分析海底物质逆转的声学数据.
- 在垂直线阵列 (VLA) 数据上使用基于特征的反转.
- 为了描述新英格兰大陆架的特征,海底破裂.
主要方法:
- 基于特征的声学数据的反转.
- 直接和底部反射路径的基于射线的分析.
- 粘性颗粒切割 (VGS) 模型用于海底参数化的应用.
- 正常模式建模用于范围尺度预测.
主要成果:
- 识别了对海底特性敏感的声学特征 (频率零值).
- 推断出一个两层海底模型,可能是带有~0.42孔隙度的沙子.
- 一个薄的表面层与稍高的多孔度 (~0.45-0.50) 是可能的.
- 根据短距离数据估计了VGS参数.
结论:
- 基于特征的反转有效地描述了海底的特性.
- VGS模型为海底声学提供了可行的参数化.
- 声学数据可以预测在更长的范围内接收的水平.
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