南黄海海底沉积物声学特性及其影响因素试验研究

孟祥梅; 刘保华; 阚光明; 李官保

南黄海海底沉积物声学特性及其影响因素试验研究

1.
国家海洋局第一海洋研究所, 山东青岛 266061;国家海洋局第一海洋研究所海洋沉积与环境地质国家海洋局重点实验室, 山东青岛 266061
2.
国家深海基地管理中心, 山东青岛 266061

基金项目: 海洋公益性行业科研专项经费项目(200805008);国家自然科学基金项目(41106061)。

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出版历程
- 收稿日期: 2011-11-29
- 修回日期: 2012-05-17

An experimental study on acoustic properties and their influencing factors of marine sediment in the southern Huanghai Sea

1.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Key Laboratory of State Oceanic Administration for Marine Sedimentology and Environmental Geology, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
2.
National Deep Sea Center, Qingdao 266061, China

摘要

摘要: 利用自南黄海中西部海底取回的沉积物样品,对其声学特性及其影响因素进行了试验研究,结果显示,研究区海底沉积物的压缩波速为1.359 ~1.695 km/s,剪切波速为12.5 ~70.9 m/s;颗粒较细的沉积物与较低的压缩波速、剪切波速对应,主要集中在研究区东侧水深较深处;沉积物的物理力学性质对其压缩波速、剪切波速的影响较显著,沉积物的温度和换能器的频率对上述声学两参数也具有一定的影响,而沉积物的包含物及薄夹层等影响声波传播的理论计算结果。给出了研究区海底沉积物物理力学各参数与压缩波速、剪切波速之间的回归方程,以期为国防、工程提供基础资料。
- 黄海 /
- 海底沉积物 /
- 声学特性 /
- 影响因素
Abstract: Using the marine sediment samples collected from the middle western area of the southern Huanghai Sea, the experimental study on sediment acoustic properties and their influencing factors was conducted. The experimental results show that the compressional wave speeds range from 1.359 to 1.695 km/s, and the shear wave speeds range between 12.5 and 70.9 m/s; the finer grained sediment, which is distributed mainly over the east side of study area where the water depth is deeper, corresponds to the lower compressional wave speed and the shear wave speed; the sediment physical-mechanical properties have a great influence on the compressional wave speed and the shear wave speed, and the sediment temperature and the transducer frequency have a definite effect on the compressional and shear wave speeds; the sediment heterogeneity such as layering or inclusions influences the calculation accuracy of wave propagation models. The regressions among sediment physical-mechanical properties and acoustic properties are given in order to provide basic information for national defence and engineering construction.
- Huanghai Sea /
- marine sediment /
- acoustic properties /
- influencing factors

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