| 张鹏,吴立新,胡治国,张雪冬.多项式混沌展开的浅海水声环境参数敏感度分析*[J].,2021,40(3):422-432 |
| 多项式混沌展开的浅海水声环境参数敏感度分析* |
| Sensitivity analysis of uncertain environmental parameters in shallow water based on polynomial chaos expansion |
| 投稿时间：2020-07-19 修订日期：2021-05-05 |
| 中文摘要: |
| 海洋环境参数的不确定性以及环境参数与声场之间的非线性关系导致水下声场预测的不确定性。本文将Sobol敏感度指数的计算与混沌多项式展开方法相结合,将敏感度指数表达为环境条件的函数,分析了浅海环境中关键物理海洋条件对水下声传播的影响。考虑一个具有8个独立的不确定参数的浅海水声传播模型,研究了声源分布位于温跃层内和温跃层下时浅海声场对环境参数的敏感度随着传播距离的变化,分析了不同频率的环境参数敏感度指数。研究的结果对水声通信系统在浅海不确定环境下的性能预报和辅助决策分析奠定了基础。 |
| 英文摘要: |
| The uncertainty of ocean environmental parameters and the nonlinear relationship between environmental parameters and sound field lead to the uncertainty of underwater sound field prediction.In this paper, Sobol sensitivity index is combined with the polynomial chaos expansion method to calculate the influence of key physical ocean environmental parameters on underwater sound propagation in shallow water. Considering a shallow water sound propagation model with 8 independent uncertain parameters, the sensitivity index of underwater sound field to environmental parameters changes with the propagation distance and frequencies is analyzed when the source distribution is in or under the thermocline. The study result is meaningful for the performance analysis of underwater communication system in uncertain shallow water environment. |
| DOI：10.11684/j.issn.1000-310X.2021.03.014 |
| 中文关键词: 不确定性分析，环境敏感度，多项式混沌展开，传播损失 |
| 英文关键词: Uncertainty propagation,Sensitivity analysis,Polynomial chaos expansion, Transmission loss |
| 基金项目:国家自然科学基金项目（11774374） |
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