| ZHENG Jiewen,LIU Baohua,KAN Guangming,LI Guanbao,PEI Yanliang,LIU Xiaolei.The sound velocity and bulk properties of sediments in the Bohai Sea and the Yellow Sea of China[J].Acta Oceanologica Sinica,2016,35(7):76-86 |
| 中国黄渤海沉积物声速与物理性质研究 |
| The sound velocity and bulk properties of sediments in the Bohai Sea and the Yellow Sea of China |
| 投稿时间：2015-07-09 修订日期：2015-09-24 |
| DOI：10.1007/s13131-016-0906-x |
| 中文关键词: 声速 粒度组分 物理性质 频散 经验关系函数 |
| 英文关键词:sound velocity particle composition physical properties frequency dispersion empirical equation |
| 基金项目:The National Natural Science Foundation of China under contract Nos 41106061, 41506077, 41330965 and 41402253; the Specialized Research Fund of First Insititute of Oceanography under contract No. GY0215G06; the Public Science and Technology Research Funds Projects of Ocean of State Oceanic Administration under contract No. 201405032. |
| 作者 | 单位 | E-mail | | 郑杰文 | 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, 青岛, 266061
青岛海洋科学与技术国家实验室, 海洋地质过程与环境功能实验室, 青岛, 266237 | | | 刘保华 | 国家深海基地管理中心, 青岛, 266237 | | | 阚光明 | 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, 青岛, 266061
青岛海洋科学与技术国家实验室, 海洋地质过程与环境功能实验室, 青岛, 266237 | | | 李官保 | 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, 青岛, 266061
青岛海洋科学与技术国家实验室, 海洋地质过程与环境功能实验室, 青岛, 266237 | | | 裴彦良 | 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, 青岛, 266061
青岛海洋科学与技术国家实验室, 海洋地质过程与环境功能实验室, 青岛, 266237 | | | 刘晓磊 | 青岛海洋科学与技术国家实验室, 海洋地质过程与环境功能实验室, 青岛, 266237
中国海洋大学, 山东省海洋环境地质工程重点实验室, 青岛, 266061 | xiaolei@ouc.edu.cn |
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| 中文摘要: |
| 为建立考虑沉积物声速频散效应的海洋沉积物声速与物理性质关系模型，本文基于黄渤海沉积物样品在25-250 kHz频率范围的压缩波速与土工参数的测量分析，研究了考虑沉积物声速频散效应的海洋沉积物声速与物理性质参量间的经验关系模型。研究结果表明黄渤海沉积物声速频散效应明显，在测量频率范围内，沉积物声速在1.232 km/s与1.721 km/s范围内变化。沉积物分选程度越低，声速频散现象越明显，两者近似呈负线性增长关系。与沉积物其他土工参数相比，沉积物孔隙度与声速表现出非常好的负对数函数关系。一方面，沉积物声速随平均粒径、砂粒含量、湿容重与干容重的增加而增长，随黏粒含量与含水量的降低而增长。另一方面，由于沉积物非均匀性对高频声速测量影响明显，导致低频测量声速与沉积物物理参数的经验关系函数相关程度明显高于高频声速。 |
| 英文摘要: |
| In order to investigate the correlation between a sound velocity and sediment bulk properties and explore the influence of frequency dependence of the sound velocity on the prediction of the sediment properties by the sound velocity, a compressional wave velocity is measured at frequencies of 25-250 kHz on marine sediment samples collected from the Bohai Sea and the Yellow Sea in laboratory, together with the geotechnical parameters of sediments. The results indicate that the sound velocity ranges from 1.232 to 1.721 km/s for the collected sediment samples with a significant dispersion within the series measuring frequency. Poorly sorted sediments are highly dispersive nearly with a positive linear relationship. The porosity shows a better negative logarithmic correlation with the sound velocity compared with other geotechnical parameters. Generally, the sound velocity increases with the increasing of the average particle size, sand content, wet and dry bulk densities, and decreasing of the clay content, and water content. An important point should be demonstrated that the higher correlation can be obtained when the measuring frequency is low within the frequency ranges from 25 to 250 kHz since the inhomogeneity of sediment properties has a more remarkably influence on the laboratory sound velocity measurement at the high frequency. |
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