海洋环境噪声预报与仿真方法研究

基于Harrison提出的理论,推导了风成噪声场的空间相关函数、垂直指向性函数以及噪声强度表达式,进行了实例仿真计算和结果分析.利用该方法得到特定环境和深度上噪声功率谱密度,设计相应的AR滤波器,进行了噪声时间序列的仿真.结果表明,这一模型能够快速有效地预报海洋环境噪声场,以及进行特定海洋环境和接收器深度下的噪声时间序列仿真.

Research on Ocean Ambient Noise Prediction and Simulation

The prediction of ocean ambient noise and the simulation of noise time sequence are studied by ray theory and AR filters.Following the deduction of Harrison,the representation of space correlation function,vertical directionality and noise level is derived with the analysis of the result of an example.With the noise power spectral density of given ocean environments and receiver depths computed by the method above,an AR filter is designed to simulate the noise time sequence.The power spectral density of the output sequence accords well with the reference.The results indicate that this model can predict the ocean ambient noise rapidly,and simulate the noise time sequence of the given ocean environments and receiver depths effectively.