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题名	水下声环境特性演示系统实现
作者	李海峰
学位类别	博士
答辩日期	2003
授予单位	中国科学院声学研究所
授予地点	中国科学院声学研究所
关键词	水下声环境预报模型 演示系统 数值预报仪
其他题名	Realization of the underwater acoustical environment demo-system
中文摘要	传播问题、混响问题和海洋环境噪声问题是海洋声学研究的最基本的、重要的课题。人们为便于利用计算机解决这些问题，采用数值计算的科学方法，对相关问题不同方面作出合理的近似，提出了不同的算法，其主要的算法有：声场简正波算法，射线算法和抛物方程法。为了充分利用这些算法资源，有必要建立一个可扩展的水声传输应用演示软硬件平台，快速显示典型海域声场的传输特性和水声环境景象及典型海域的水声环境效应。在现有声场数值预报模型研究的基础上，建立一个综合声传播特性、混响和海洋环境噪声特性在内的水下声环境特性演示系统，模拟和仿真水下战场环境景象，并为海军装备的研制和验收以及性能评估、海军舰艇的作战使用提供技术支持和保障。本文主要利用现有的研究成果，采用面向对象的设计方法，嵌入简正波算法、射线算法和PE算法，设计一个包括声场预报、混响预报和噪声预报的综合多媒体演示系统，主要内容如下：首先，简要介绍了简正波算法、射线算法和PE算法，分析了声场数值预报仪1．0版的优缺点。论文采用面向对象的设计方法（OOD），对多媒体演示系统进行分析和设计，简述了这种方法的概念和设计内容。其次，论文通过研究软件设计任务，设计了应用演示系统的总体结构、功能模块和流程。接着，分析设计了演示系统中部分重要代码，着重描述了数据结构的表示，处理过程的设计和处理过程的调用。详细讲解了平台的选择、输入参数的分类和录入、嵌入算法的调用、参数传递和接口、输出数据的转换和显示等算法。最后，运用设计的演示系统进行声场预报，给出了一些水文条件下预报实例。
英文摘要	The problems of sound propagation, reverberation and ocean ambient noise are several basic and important subjects of ocean acoustics. In order to easily solve those problems by computer, researchers take the advantage of numerical computation methods and make reasonable approximation on different parts of problems. With the development of technique many main algorithms or theory such as normal mode of sound field, ray trace theory and PE algorithm have been put forward to. Now, it's necessary to set up an extendable software-hardware Demo-platform so that we can fully use these resources to rapidly display characteristics and response of underwater acoustical environment in typical ocean environment. Based on the achievement of numerical predication model, a comprehensive underwater acoustical environment Demo-system is built including characteristics of sound propagation, reverberation and ocean ambient noise. This system vividly simulates underwater battlefield and supplies Navy force with technical support. This system also guarantees equipment research, testing of Navy and evaluates Navy equipment abilities. In this paper, an integral multi-media Demo-system including the sound field predication, the reverberation predication and the ocean ambient noise predication are designed. This system makes use of the research we achieved, adopts object-oriented design (OOD) as methods and embeds the normal mode, ray trace theory and PE algorithm. Firstly, the normal mode, the ray trace theory and PE algorithm are introduced. We analyse the disadvantages and advantages of the software: the numerical predication of sound field, version 1.0. In order to use the methods of OOD to analysis and design the multi-media system, we illustrate the concepts and design. Secondly, the architecture, the function model and the flow are designed after deeply researching the task of software design. Thirdly, we design and analyse parts of the important codes and algorithms, put highlight on the data structure, the processing procedure and the using of procedure. We also explain in details how the platform is chosen, the parameters classified and input, the using of embedded algorithms, the parameters pass, interface and displaying control. Finally, some examples of prediction are given by the multi-media Demo-system.
语种	中文
公开日期	2011-05-07
页码	57
内容类型	学位论文
源URL	[http://159.226.59.140/handle/311008/1084]
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	李海峰. 水下声环境特性演示系统实现[D]. 中国科学院声学研究所. 中国科学院声学研究所. 2003.

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