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通过随机分布的冰块进行水下声学传播的建模和模拟
Nicholas P Chotiros1, Sverre Holm2
1Applied Research Laboratories, The University of Texas at Austin, Austin, Texas 78758, USA.
JASA express letters
|March 22, 2024
概括
通过冰块模拟了声学传播. 一个扩展的Biot模型准确地描述了高达300Hz的声速和衰减,此后多重散射效应成为主导.
科学领域:
- 声学 声学 声学 声学
- 材料科学 材料科学 材料科学
- 计算物理 计算物理
背景情况:
- 了解复杂介质中的声波传播对于各种应用至关重要.
- 由于冰层的异质性,冰层对声学建模具有独特的挑战.
- 现有的模型往往难以准确地捕捉广泛频率范围内的声学行为.
研究的目的:
- 通过随机分配1米冰块来模拟和分析声学传播.
- 作为频率的函数来确定有效的声音速度和衰减.
- 评估不同声学模型的适用性,包括单散射和Biot近似值.
主要方法:
- 使用3D有限元模型来模拟声波传播.
- 模拟涵盖了100至1000赫兹的频率.
- 计算的声音速度和衰减与理论模型进行了比较.
主要成果:
- 从模拟的信号中成功计算了有效的声速和衰减.
- 一个扩展的Biot模型为模拟数据提供了很好的匹配,最高可达300Hz.
- 在300Hz以上,观察到多重散射效应主导声学传播.
结论:
- 扩展的Biot模型是有效的描述声学传播在随机分布的冰高达300赫兹.
- 多重散射成为影响更高频率声学行为的主要机制.
- 这项研究强调了声波与冰相互作用的频率依赖性.
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