Research progress and discussion on sound velocity characteristics of seafloor surface sediments

Zou Dapeng; Xiao Tibing; Long Jianjun; Lu Bo; Li Ganxian

doi:10.3969/j.issn.0253-4193.2019.01.016

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Zou Dapeng, Xiao Tibing, Long Jianjun, Lu Bo, Li Ganxian. Research progress and discussion on sound velocity characteristics of seafloor surface sediments[J]. Haiyang Xuebao, 2019, 41(1): 160-171. doi: 10.3969/j.issn.0253-4193.2019.01.016

Citation:

Zou Dapeng, Xiao Tibing, Long Jianjun, Lu Bo, Li Ganxian. Research progress and discussion on sound velocity characteristics of seafloor surface sediments[J]. Haiyang Xuebao, 2019, 41(1): 160-171. doi: 10.3969/j.issn.0253-4193.2019.01.016

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Research progress and discussion on sound velocity characteristics of seafloor surface sediments

doi: 10.3969/j.issn.0253-4193.2019.01.016

1.
Guangdong Provincial Key Lab of Computer Integrated Manufacturing, Guangdong University of Technology, Guangzhou 510006, China
2.
Guangdong Provincial Key Lab of Computer Integrated Manufacturing, Guangdong University of Technology, Guangzhou 510006, China;State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
3.
CAS Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China

Received Date: 2017-09-04
Rev Recd Date: 2018-09-17

Abstract

Abstract

The seafloor surficial sediments have multiphase, multi-particle and multi-morphological structures, which lead to complex and diverse acoustic wave propagation process. Based on the analysis of the characteristics of compressional wave velocity and shear wave velocity, the scientific problems and key technical problems to be solved are pointed out. On the basis of analyzing the research status of sound velocity characteristics at home and abroad, this paper suggests that a systematic and controllable experimental measurement method to solve the four problems existing in current measurement. With a comprehensive analysis on the relationship between compressional wave velocity and shear wave velocity including their regression relation and theoretical analysis, differences on measuring scale, measuring frequency, and measurement status are discussed for current three kinds of methods including geoacoustic inversion, samples acoustic measurement, and in-situ acoustic measurement. And also the methods on the consistency of explanation for measurement results of different measurement methods and measurement techniques are discussed, to obtain the real seabed sediment acoustic characteristics of different types and different regions. Finally, six technical demands are presented such as the laboratory measurement of physical and mechanical parameter measurement, acoustic analysis of fluid solid coupling characteristics, in-situ measurement and monitoring of submarine sediments, error analysis and correction between sampling analysis and in-situ measurement, and the surface acoustic measurement technology of deep sediments, with the aim to improve the accuracy of acoustic detection of the sea and the seafloor, and promote development of ocean engineering.
- seafloor sediment,
- shear wave,
- compressional wave,
- sound velocity,
- in-situ measurement

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References

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