物理学报2016，Vol.65Issue(3)：034301-1-034301-9,9.DOI:10.7498/aps.65.034301
三维绝热简正波-抛物方程理论及应用
Three-dimensional adiabatic mo de parab olic equation metho d and its applications
摘要
Abstract
Complex zone of the ocean is often characterized by horizontal variations of environmental parameters (bathymetry, sound speed profile, bottom properties etc.), initiating redistribution of the sound field in horizontal plane, which is the so-called three-dimensional (3D) effect. Based on the adiabatic mode parabolic equation method, modeling of 3D effects is carried out, in which the eigenvalues and eigenfunctions are calculated by the standard normal mode model KRAKEN, and the amplitude corresponding to each mode is computed by the wide-angle parabolic equation model RAM. The present 3D model is very efficient and can give clear physical meaning, but it can be only applied to a waveguide whose properties vary gradually with horizontal range due to the adiabatic assumption between different modes. This model is then used to analyze the horizontal refraction caused by internal waves and by a coastal wedge. The numerical results show that there are several areas in the horizontal plane, corresponding to different structures of intensity distributions. Moreover, the redistribution of the sound field in horizontal plane depends on source frequency and mode number. Frequency and modal dependences lead to variations of spectrum, distortion of signal with some spectrum, and spatiotemporal fluctuations of the sound field.关键词
三维声传播/绝热简正波-抛物方程/内波/大陆架斜坡Key words
three-dimensional sound propagation/adiabatic mode parabolic equation/internal waves/coastal slope引用本文复制引用
秦继兴,Katsnelson Boris,彭朝晖,李整林,张仁和,骆文于..三维绝热简正波-抛物方程理论及应用[J].物理学报,2016,65(3):034301-1-034301-9,9.基金项目
国家自然科学基金(批准号:11434012,41561144006,11174312)和海洋公益性行业科研专项经费(批准号:201405032)资助的课题.* Project supported by the National Natural Science Foundation of China (Grant Nos.11434012,41561144006,11174312), and the Public Science and Technology Research Funds Projects of Ocean, China (Grant No.201405032) （批准号:11434012,41561144006,11174312）
