In-situ characterization of wave velocity in ice cover with seismic observation on guided wave

IF 3.8 2区工程技术 Q1 ENGINEERING, CIVIL

Cold Regions Science and Technology Pub Date : 2024-12-05 DOI:10.1016/j.coldregions.2024.104392

Jiahui Gao , Yuxiang Zhang , Dingyi Ma , Zhinan Xie , Anliang Wang , Haonan Zhang

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引用次数: 0

Abstract

In-situ characterization of the acoustic velocity of sea ice is crucial for the successful application of related technologies. However, the elastic waveguide properties of ice sheets convert the acoustic energy into elastic waves of different modes. The overlap in both time and frequency domains poses significant challenges to the accuracy and feasibility of wave velocity estimation. A method for in-situ characterization of wave velocity in ice is proposed. Guided waves are generated through a unidirectional impact on the upper surface of the ice, and the resulting wavefield is collected within a close range using multi-wave, multi-component observations. By applying filters designed based on the polarization features, the wave packets of the S0 mode and SH waves are isolated. The arrival times of these waves are then used to estimate their respective propagation velocities. The propagation velocity of the S0 mode at low frequencies is approximated with that of the longitudinal wave in plate. The resulting propagation velocities of the longitudinal and shear waves are found to be consistent with previously reported results. A quantitative analysis of the uncertainty in velocity estimation is also included to identify the main causes and discuss potential solutions.

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来源期刊

Cold Regions Science and Technology 工程技术-地球科学综合

CiteScore

7.40

自引率

12.20%

发文量

209

审稿时长

4.9 months

期刊介绍： Cold Regions Science and Technology is an international journal dealing with the science and technical problems of cold environments in both the polar regions and more temperate locations. It includes fundamental aspects of cryospheric sciences which have applications for cold regions problems as well as engineering topics which relate to the cryosphere. Emphasis is given to applied science with broad coverage of the physical and mechanical aspects of ice (including glaciers and sea ice), snow and snow avalanches, ice-water systems, ice-bonded soils and permafrost. Relevant aspects of Earth science, materials science, offshore and river ice engineering are also of primary interest. These include icing of ships and structures as well as trafficability in cold environments. Technological advances for cold regions in research, development, and engineering practice are relevant to the journal. Theoretical papers must include a detailed discussion of the potential application of the theory to address cold regions problems. The journal serves a wide range of specialists, providing a medium for interdisciplinary communication and a convenient source of reference.