动态直角窄角抛物线方程用于静态水下声音传播. 第二部分:应用程序
Wael H Ali1,2, Pierre F J Lermusiaux1,2
1Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
The Journal of the Acoustical Society of America
|January 25, 2024
概括
动态直角窄角抛物线方程 (DO-NAPEs) 准确地预测复杂的声场及其概率分布. 与水下声学直接蒙特卡洛模拟相比,这种方法可以节省大量的计算成本.
科学领域:
- 水下声学 水下声学
- 计算物理学的计算物理.
- 波浪传播建模的模拟.
背景情况:
- 在不确定的水下环境中精确建模声场至关重要.
- 需要随机方法来捕捉声音速度,浴度和源位置的变化.
- 像蒙特卡洛模拟这样的现有方法是计算密集的.
研究的目的:
- 举例说明和描述随机动态直角窄角抛物线方程 (DO-NAPEs) 的特性和能力.
- 通过确定性解决方案和直接的蒙特卡洛预测来验证DO-NAPE的结果.
- 评估DO-NAPE的计算优势和随机趋同.
主要方法:
- 将DO-NAPE应用于三个2D随机测试案例 (范围独立和范围依赖).
- 包括声音速度,浴度和源位置的不确定性.
- 根据分析解决方案和直接的蒙特卡洛 (MC) 声压和传输损失预测进行验证.
主要成果:
- DO-NAPE准确地预测了随机范围依赖的声场和非高斯概率分布.
- 与直接的MC方法相比,显著的计算节省 (数量级).
- DO-NAPE提供准确的统计数据 (平均值,差异,多种模式,完全分布) 和重建的实现.
结论:
- 在复杂的水下环境中,DO-NAPE提供了一种计算效率高,准确的方法来建模复杂的静态声场.
- 该方法的合特性和适应性质有效地处理主导的不确定性.
- 在速度和准确性方面,DO-NAPE在预测复杂的声场统计和实现方面优于传统方法.
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