摘要
海水表面因海浪等因素引起的水面散射会造成声场的扰动,为研究高频条件下海面起伏对接收声场的影响,基于表面散射敏感核函数(SSK)的推导结果,分别从声场的数值仿真和敏感核正演两个角度对接收声场的声压相对变化进行了分析。结果表明表面散射敏感核的空间分布特性与本征声线在水面反射的位置有关,通过线性分析说明了在较小的扰动范围内,表面散射敏感核可以建立海面局部扰动与声压相对变化的线性关系,为海洋观测的研究提供了参考。
The acoustic scattering from a local disturbance of sea-surface due to wave and other causes leads to the disturbance of acoustic field.In order to analyse the influence of sea surface fluctuating on the receiving sound field under high frequency conditions,the surface sensitivity kernel(SSK)is derived at first.Then,the Characteristics of spatial distribution and linearity of SSK are investigated by comparing the results of numerical simulation of the sound pressure field and the forward modeling of SSK.The results show that the spatial distribution of SSK is related to the reflection positions of eigenrays on the sea-surface.A few linearity tests shows that SSK can be taken as a linear pressure estimator,i.e.the linear relationship between the local disturbance of sea-surface and the disturbance of sound pressure field can be established by SSK,when the local disturbance of the sea-water boundary is small.The analyses in this paper provides a reference for the research of the ocean observation.
作者
刘帅京
许枫
杨娟
LIU Shuaijing;XU Feng;YANG Juan(Ocean Acoustic Technology Center,Institute of Acoustics,Chinese Academy of Sciences,Beijing,100190,China;University of Chinese Academy of Sciences,Beijing,100049,China)
出处
《网络新媒体技术》
2021年第4期39-44,共6页
Network New Media Technology
基金
国家重点研发计划项目(24103,21202),国家自然科学基金项目(41527901),中国科学院战略性先导科技专项(XDA13030604)。
关键词
扰动声场
一阶Born近似
表面散射敏感核
disturbed acoustic field
first-order born approximation
surface scattering sensitivity kernel
