Response spectra for transient pore-pressure in a sandy seabed under random waves: Frequency-filtering effect

doi:10.1016/j.oceaneng.2023.114490

IMECH-IR > 流固耦合系统力学重点实验室

	Response spectra for transient pore-pressure in a sandy seabed under random waves: Frequency-filtering effect
	Yu JH(于嘉豪); Gao FP(高福平); Li CF(李畅飞)
发表期刊	OCEAN ENGINEERING
	2023-07
卷号	279 页码:114490
ISSN	0029-8018
摘要	The real state of ocean waves is random in nature with various monochromatic components. Transient pore pressures in a sandy seabed under the action of the random-waves with JONSWAP spectrum and the regular -waves were physically modeled, respectively. The surface elevations and the corresponding transient pore pressures in the fine-sand were measured simultaneously in a wave flume. The frequency-filtering phenomenon was observed by Fourier analysis for random-wave induced pore pressure responses. In the Fourier energy spectra, both a primary-peak (high-frequency) and a secondary-peak (low-frequency) were identified within the relatively shallow soil layer. But the primary-peak kept declining rapidly, meanwhile the secondary-peak attenuated much more slowly with increasing soil depth, which can eventually lead to a shift between the high-frequency peak and the low-frequency one. As a consequence, the upgraded primary-peak frequencies of the dual-peaked spectra at the deeper soil layer would become smaller than the original significant frequencies, indicating that the pore pressure induced by long-wave components is of vital significance there. Furthermore, a filtering-depth parameter is introduced to characterize the frequency-filtering effect. Given the pore pressure at a certain soil depth, the quantitative relationship between the primary-peak and the secondary-peak can be pre-dicted for an arbitrary soil depth.
关键词	Random waves Transient pore-pressure Flume observation Amplitude-attenuation Frequency-filtering
DOI	10.1016/j.oceaneng.2023.114490
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000983510000001
项目资助者	National Natural Science Foundation of China [11825205]
论文分区	一类
力学所作者排名	1
RpAuthor	Gao, FP
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/92221
专题	流固耦合系统力学重点实验室
作者单位	1.(Yu Jia-Hao, Gao Fu-Ping, Li Chang-Fei) Chinese Acad Sci Inst Mech Beijing 100190 Peoples R China 2.(Yu Jia-Hao, Gao Fu-Ping, Li Chang-Fei) Univ Chinese Acad Sci Sch Engn Sci Beijing 100049 Peoples R China
推荐引用方式 GB/T 7714	Yu JH,Gao FP,Li CF. Response spectra for transient pore-pressure in a sandy seabed under random waves: Frequency-filtering effect[J]. OCEAN ENGINEERING,2023,279:114490.
APA	于嘉豪,高福平,&李畅飞.(2023).Response spectra for transient pore-pressure in a sandy seabed under random waves: Frequency-filtering effect.OCEAN ENGINEERING,279,114490.
MLA	于嘉豪,et al."Response spectra for transient pore-pressure in a sandy seabed under random waves: Frequency-filtering effect".OCEAN ENGINEERING 279(2023):114490.

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