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CHEN Xiaoting, HUANG Bolin, WANG Jian, ZHANG Quan, FENG Wanli. 2020. Two-phase motion analysis system for landslide-induced impulse wave based on the particle image velocimetry. Journal of Geomechanics, 26(4): 492-499. doi: 10.12090/j.issn.1006-6616.2020.26.04.042
Citation: CHEN Xiaoting, HUANG Bolin, WANG Jian, ZHANG Quan, FENG Wanli. 2020. Two-phase motion analysis system for landslide-induced impulse wave based on the particle image velocimetry. Journal of Geomechanics, 26(4): 492-499. doi: 10.12090/j.issn.1006-6616.2020.26.04.042
shu

Two-phase motion analysis system for landslide-induced impulse wave based on the particle image velocimetry

  • Key Laboratory of Disaster Prevention and Mitigation of Hubei Province, China Three Gorges University, Yichang 443002, Hubei, China

Received Date:  25 April 2020
Revised Date:  30 June 2020
Publish Date:  25 August 2020
    Abstract

  • Landslide-induced impulse wave disasters threaten the safety of production and life of residents along both sides of the river and the safety of navigation channels. However, there is still a lack of relevant physical experimental analysis system to provide fluid-solid two-phase motion vector synchronously to deeply analyze the mechanism of impulse wave generated by landslide. In this paper, the particle image velocimetry (PIV) and experimental implementation method based on fluid-solid two-phase recognition are proposed. This PIV technique can achieve a minimum spatial resolution of 1.17 mm and a minimum observation speed of 0.117 m/s in 0.01 s with a 2560×1024-pixel industrial camera under a 3 m×1.5 m observation window. The error sources related to this system and the solutions to overcome the related problems are proposed. A two-phase motion observation platform for landslide and its impulse wave is constructed by related hardware facilities, and a special resolving software is compiled. The demonstration tests of three-dimensional granular pillar collapse, two-dimensional granular column collapse and its impulse wave and underwater collapse-induced impulse wave have been carried out, and good results have been achieved. This system can reveal the whole process of rock, soil and water movement, and has good application prospects. It will provide a powerful research tool for landslide-induced impulse wave and related dynamics research.

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