海底底质声学性质及原位测量技术研究

IOCAS-IR > 海洋环流与波动重点实验室

	海底底质声学性质及原位测量技术研究
其他题名	Research of Acoustic Properties and In-situ Measurement Method of Seafloor Sediments
	谷明峰
学位类型	博士
	2008-06-06
学位授予单位	中国科学院海洋研究所
学位授予地点	海洋研究所
关键词	海底底质声速声衰减系数原位测量
摘要	海底表层沉积物的声学特性（主要指纵波声速和声衰减系数）研究对海洋军事以及海洋环境声场的研究都具有重要的意义。海底表层沉积物声速和声衰减系数的测量方法主要有两种：取样测量和原位测量。由于取样测量存在着一些难以克服的弊端，例如取样过程中对沉积物的扰动，原位测量正逐渐成为海底沉积物声学性质测量的核心技术。国外在20世纪50年代就已经开始了海底表层沉积物声学特性的研究，并取得了一些研究成果。20世纪90年代初，国外相继研制了多种海底底质声学特性原位测量系统，大大的提高了海底底质声学参数测量的效率和精度。我国在这方面的研究还是一个非常薄弱的环节，相关的实际需求急需国内的科研人员开展这方面的研究工作，为海底表层沉积物的声学特性提供测量技术支持。本文主要分析了国外在海底表层沉积物声学性质以及原位测量技术方面的研究成果，根据海底表层沉积物的声学特性，研究了表层沉积物的原位测量方法，在此测量方法的基础上，开发了海底声学参数原位测量技术。利用我们初步研制的原位测量系统，分别在实验室内和海滩上对不同类型的沉积物进行了测量试验，试验测量数据分析证明研制的测量系统能够有效地测出沉积物的声速和声衰减系数。总结本文的研究工作，主要取得如下成果： 1) 提出了新的海底表层沉积物声学性质原位测量方法； 2) 设计开发了海底表层沉积物声学参数原位测量系统； 3) 利用测量数据，分析研究了海底表层沉积物的声学特性。
其他摘要	The acoustic properties (mainly mentioned for compression wave speed and attenuation coefficient) research of seafloor sediments has a great sense to marine military and marine acoustic field. There are two methods for the measurement of acoustic speed and attenuation coefficient, the first is measure after sample; the other is in-situ measurement. In-situ measurement is being used more popular since measure after sample has fundamental limitation, such as disturbance as collecting. External scientists have began to research the acoustic properties of seafloor sediments since the 50s 20th, and have been made many scientific payoffs. In the beginning of the 90s 20th, many seafloor sediment acoustic properties measurement apparatuses come out reciprocally, which develop the efficiency and accuracy of acoustic properties measurement of seafloor sediments greatly. While in china, the research in this field is weak, so much work in this field is needed urgently to give technical supply to the seafloor sediments acoustic properties research. In this paper, we analyze the research of seafloor sediments acoustic properties and the development of in-situ measurement technique. According to the properties of seafloor sediments, we study and develop in-situ measurement technique of seafloor sediments. With the in-situ measurement system we develop, we take experiments in many different kinds of sediments in laboratory and sea beach, and the data obtained proved the system we develop can measure acoustic speed and attenuation coefficient of seafloor sediments effectively. In summary, we obtain some results below: 1) Propose new method of measuring acoustic speed and attenuation coefficient of seafloor sediments; 2) Develop in-situ measurement system of acoustic speed and attenuation coefficient of seafloor sediments; 3) With the data obtained, research the acoustic properties of seafloor sediment preliminary.
页数	75
语种	中文
文献类型	学位论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/413
专题	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	谷明峰. 海底底质声学性质及原位测量技术研究[D]. 海洋研究所. 中国科学院海洋研究所,2008.

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