题名PE模型的研究及其应用
作者晓天
学位类别博士
答辩日期1998
授予单位中国科学院中科院声学所
授予地点中科院声学所
关键词PE模型 抛物线方程 SSF/PE算法 SSP/PE算法 海洋声学
中文摘要PE模型是一种传播模型。它可以解决声波在水文条件具有水平变化的海洋中的传播问题。本论文主要研究PE模型。首先,对PE模型进行了理论研究。从全波动方程出发,采取一定的近似,导出PE(抛物线方程),阐述了PE模型的基本原理,并与其它传播模型相比较,指出了PE模型的优点。然后讨论了PE算法,对两个具体的算法:SSF/PE(裂步傅里叶变换)算法和SSP/PE(裂步Pade近似)算法进行了验证和比较。SSP/PE算法可以容忍较大的步长而误差较小,且对复杂声环境的适应性较好。接着,以PE模型为基础,采用频率综合的办法,对宽带信号的传播波形进行研究和预报。所考虑的宽带信号有高斯脉冲信号,线性调频信号,M序列码信号。最后,利用PE模型来模拟高斯束的传播,所得到的结果与射线理论的一致。
英文摘要PE model is one of the important propagation models. It is a popular and efficient tool to study the sound propagation in range-depent environments. In this paper, PE model is mainly studied. Firstly, PE model is derived from two-way wave equation assuming some approximations. Compared with other propagation models, the advantages of PE model are pointed out Furthermore, two concrete numerical algorithms, SSF/PE and SSP/PE, are verified. The comparisons between them are made. Depending on PE model, a program is developed to solve the propagation of broadband signals with frequency synthesis method. It is used to predict the propagation waveform of broadband signals such as pulse, linear FM signals and M-sequence signals. It also be used to study the propagation of Gaussian beams. The basic aspects of rays are showed from the results.
语种中文
公开日期2011-05-07
页码58
内容类型学位论文
源URL[http://159.226.59.140/handle/311008/1382]  
专题声学研究所_声学所博硕士学位论文_1981-2009博硕士学位论文
推荐引用方式
GB/T 7714
晓天. PE模型的研究及其应用[D]. 中科院声学所. 中国科学院中科院声学所. 1998.
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