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学科主题: Engineering ; Oceanography ; Mining & Mineral Processing
题名: Research on Acoustic Properties of Seafloor Sediment with Temperature and Pressure Controlled
作者: Zou, DP ; Yan, P ; Zhou, JP
通讯作者: anthonyzou@126.com
关键词: acoustic ; in-situ ; pressure ; sediment ; temperature
刊名: MARINE GEORESOURCES & GEOTECHNOLOGY
发表日期: 2014
卷: 32, 期:2, 页:93-105
收录类别: sci
部门归属: [Zou, D. P.] Guangdong Univ Technol, Sch Electromech Engn, Guangzhou 510006, Guangdong, Peoples R China ; [Zou, D. P. ; Yan, P.] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou, Guangdong, Peoples R China ; [Zhou, J. P.] State Ocean Adm, Inst Oceanog 2, Hangzhou, Zhejiang, Peoples R China
项目归属: 海洋地质
资助者: State Key Laboratory of Acoustics, Institute of Acoustics, CAS [SKLOA201003]; National Nature Science Foundation of China [41106030]; scientific research fund of, Second Institute of Oceanography, State Oceanic Administration [JT1201]
摘要: The submarine in-situ environmental state was simulated to study the acoustic properties of seafloor sediments of the South China Sea in different temperature and pressure environments in this article with the application of the small-scale acoustic measurement system of seafloor sediments. Some conclusions could be drawn, including: (1) the velocity and center frequency of sound wave propagation of sediment are influenced by temperature more than by water pressure in different depth; (2) with the temperature rising, the sound velocity and the energy dissipation increase while the center frequency of sound wave propagation decreases; and (3) with the seawater pressure rising, the sound velocity varied little within 1% through a depth of 1500m and the energy dissipation decreases large. So when correcting the laboratory measurement sound speed into the in-situ data, it should be noticed that the influence of temperature differing from the in-situ environment is significant and the influence of water pressure variation may be omitted. The variation of the acoustic attributes of the experimental sample showed greatly nonlinearity when the temperature changes, which might result from a lot of coarse sand and shell remains scattered in the measured sediment sample. Compared to the linear acoustic properties of reconstructed samples with an even structure it is maybe the reason for nonlinear variation of acoustic properties due to the uneven structure. Moreover, the correction method of Hamilton with the sound-speed ratio of sediment to bottom seawater should be used with caution due to the nonlinear variation character.
原文出处: 查看原文
WOS记录号: WOS:000331601200001
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10627
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Zou, DP; Yan, P; Zhou, JP.Research on Acoustic Properties of Seafloor Sediment with Temperature and Pressure Controlled,MARINE GEORESOURCES & GEOTECHNOLOGY,2014,32(2):93-105
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