印尼海啸区附近海域沉积物声速测量及声学特性分析
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摘要
介绍了沉积物柱状样超声透射法测量方法和原理。对印尼海啸区附近海域沉积物柱状样进行了现场测量,通过测量数据的处理和分析,给出了沉积物的垂向声速剖面。讨论了声速与频率的关系,指出声速具有随频率的0.1次方增大的频散特性。分析沉积深度、结构以及生物扰动等方面的因素对声学测量结果的影响,结果表明海底地震引起的沉积物变迁、沉积物结构扰动、气体的混入等对声速的测量结果均产生影响。
The measurement and principle of ultrasonic measurement of sediment core are introduced.The core sample near tsunami area of Indonesia in 2004 has been measured.The velocity of vertical profile in sediment was presented through the processing and analyzing of data.The relationship is discussed and given between the velocity and the frequency.Analyzing the influence of the depth,structure and biology content of sediment on the velocity data indicates that structure disturbing and gas mixing of marine sediment by the seafloor earthquake have much influence on the velocity of sediment.
The measurement and principle of ultrasonic measurement of sediment core are introduced.The core sample near tsunami area of Indonesia in 2004 has been measured.The velocity of vertical profile in sediment was presented through the processing and analyzing of data.The relationship is discussed and given between the velocity and the frequency.Analyzing the influence of the depth,structure and biology content of sediment on the velocity data indicates that structure disturbing and gas mixing of marine sediment by the seafloor earthquake have much influence on the velocity of sediment.
引文
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[7]卢博,李赶先,黄韶健,等.中国黄海、东海和南海北部海底浅层沉积物声学物理性质之比较[J].海洋技术,2005,24(2):28—33.
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[10]STOLL R D,BAUTISTA E O.Using the Biot theory to establish a baseline geoacoustic model for seafloor sediments.Continental ShelfResearch[J].1998(18):1839-1857.
[11]梁元博,卢博.海洋沉积物声学物理和土力学[J].地球科学进展,1991,6(6):42—43.
[12]崔秋文,李建一,董军,等.印度洋大地震与海啸灾害综述[J].山西地震,2005(3):42—48.
[13]英德比岑A L.深海沉积物——物理及工程性质[M].梁元博,李粹中,卢博译.北京:海洋出版社,1981.
①韩喜球.首次环球大洋调查DY105—17A航次报告.2006.
[2]卢博,黄韶健,李赶先.声波在不同沉积物类型中传播的实验研究[J].南海研究与开发,1998(2):1—9.
[3]周建平,吕文正,陶春辉.海底柱状沉积物超声测量[J].东海海洋,2003,21(4):26—33.
[4]HAMILTON E L,BACHMAN R T.Sound velocity and related properties of marine sediments[J].J Acoust Soc Am,1982.72(6):1891—1904.
[5]卢博,梁元博.海洋沉积物与物理参数的关系[J].海洋科学,1993(6):54—56.
[6]KIM D C,SUNG J Y,PARK S C,et al.Physical and acoustic properties of shelf sediments the South Sea of Korea[J].Marine Geology,2001,179:39—50.
[7]卢博,李赶先,黄韶健,等.中国黄海、东海和南海北部海底浅层沉积物声学物理性质之比较[J].海洋技术,2005,24(2):28—33.
[8]STOKES T L,DUNN D A.Acoustic and physical property correlation of marine sediments from the Texas-Louisiana continental shelf[J].Oceans,2001,4:2624—2633.
[9]卢博.频谱分析技术在沉积声学研究中的应用[J].海洋技术,1993,12(2):13—18.
[10]STOLL R D,BAUTISTA E O.Using the Biot theory to establish a baseline geoacoustic model for seafloor sediments.Continental ShelfResearch[J].1998(18):1839-1857.
[11]梁元博,卢博.海洋沉积物声学物理和土力学[J].地球科学进展,1991,6(6):42—43.
[12]崔秋文,李建一,董军,等.印度洋大地震与海啸灾害综述[J].山西地震,2005(3):42—48.
[13]英德比岑A L.深海沉积物——物理及工程性质[M].梁元博,李粹中,卢博译.北京:海洋出版社,1981.
①韩喜球.首次环球大洋调查DY105—17A航次报告.2006.
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