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Influence of Vibrations on Indentation and Compression Strength of Sea Ice

Author(s): A. Marchenko; E. Karulin; R. Frederking; D. Cole; J. Brown; M. Karulina; A. Sakharov; P. Chistyakov; D. Sodhi; V. Markov; B. Lishman; M. Shortt; A. Sliusarenko

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Abstract: Indentation and compression strengths of floating sea ice subjected to vibrations is discussed. The experiments were performed on the land-fast ice of Van-Mijen Fjord in March of 2018 and 2019. The ice thickness was around 70 cm, and the ice salinity was 4-5 ppt. Vibratory loading was applied to the ice surface by a 400-kg commercial compactor used for compacting road fills. The vibration was applied for 10 to 15 minutes at a fixed location. The spectrum of vibrations was analyzed from accelerometer signals. Analysis of thin sections of ice was performed onsite. Indentation tests were performed on natural ice and ice subjected to the action of vibrating plate using the same hydraulic loading apparatus previously employed at the field site. It was found that indentation stroke rates were higher in the tests performed on the ice subjected to vibrations. Uniaxial compression tests were also performed on ice cores taken from the natural ice and from the ice subjected to the vibrations. Uniaxial compression strength of ice cores taken from the ice subjected to vibrations was higher than in the tests with natural ice.


Year: 2020

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