Study on sound-speed dispersion in a sandy sediment at frequency ranges of 0.5–3 kHz and 90–170 kHz

doi:10.1007/s13344-017-0013-6

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海洋地质与地球物理研究室

	Study on sound-speed dispersion in a sandy sediment at frequency ranges of 0.5–3 kHz and 90–170 kHz
	Yu, Sheng-qi 1; Liu, Bao-hua 1,3; Yu, Kai-ben 1; Kan, Guang-ming 2,3; Yang, Zhi-guo 1
刊名	China Ocean Engineering
	2017
卷号	31 期号:1 页码:103-113
关键词	Acoustic properties Bubbles (in fluids) Hydrophones Sediments Ultrasonic velocity measurement Water tanks
ISSN号	08905487
DOI	10.1007/s13344-017-0013-6
英文摘要	In order to study the properties of sound-speed dispersion in a sandy sediment, the sound speed was measured both at high frequency (90–170 kHz) and low frequency (0.5–3 kHz) in laboratory environments. At high frequency, a sampling measurement was conducted with boiled and uncooked sand samples collected from the bottom of a large water tank. The sound speed was directly obtained through transmission measurement using single source and single hydrophone. At low frequency, an in situ measurement was conducted in the water tank, where the sandy sediment had been homogeneously paved at the bottom for a long time. The sound speed was indirectly inverted according to the traveling time of signals received by three buried hydrophones in the sandy sediment and the geometry in experiment. The results show that the mean sound speed is approximate 1710–1713 m/s with a weak positive gradient in the sand sample after being boiled (as a method to eliminate bubbles as much as possible) at high frequency, which agrees well with the predictions of Biot theory, the effective density fluid model (EDFM) and Buckingham’s theory. However, the sound speed in the uncooked sandy sediment obviously decreases (about 80%) both at high frequency and low frequency due to plenty of bubbles in existence. And the sound-speed dispersion performs a weak negative gradient at high frequency. Finally, a water-unsaturated Biot model is presented for trying to explain the decrease of sound speed in the sandy sediment with plenty of bubbles. © 2017, Chinese Ocean Engineering Society and Springer-Verlag Berlin Heidelberg.
电子版国际标准刊号	21918945
资助项目	National Natural Science Foundation of China[41330965] ; National Natural Science Foundation of China[41527809]
WOS研究方向	Engineering ; Water Resources
语种	英语
出版者	Springer Verlag
WOS记录号	WOS:000392625000013
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/6504]
专题	业务部门_海洋地质与地球物理研究室
作者单位	1.National Deep Sea Center, State Oceanic Administration, Qingdao; 266237, China;; 2.Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, Qingdao; 266061, China;; 3.Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao; 266237, China
推荐引用方式 GB/T 7714	Yu, Sheng-qi,Liu, Bao-hua,Yu, Kai-ben,et al. Study on sound-speed dispersion in a sandy sediment at frequency ranges of 0.5–3 kHz and 90–170 kHz[J]. China Ocean Engineering,2017,31(1):103-113.
APA	Yu, Sheng-qi,Liu, Bao-hua,Yu, Kai-ben,Kan, Guang-ming,&Yang, Zhi-guo.(2017).Study on sound-speed dispersion in a sandy sediment at frequency ranges of 0.5–3 kHz and 90–170 kHz.China Ocean Engineering,31(1),103-113.
MLA	Yu, Sheng-qi,et al."Study on sound-speed dispersion in a sandy sediment at frequency ranges of 0.5–3 kHz and 90–170 kHz".China Ocean Engineering 31.1(2017):103-113.