Optics and Precision Engineering, Volume. 31, Issue 5, 707(2023)

Research on soft ground vehicle intrusion law based on CDEM-MPM coupling model

Pengda CHENG1... Chun FENG1,2,*, Ningdong CHANG1, Jun ZHOU1 and Xinguang ZHU1 |Show fewer author(s)
Author Affiliations
  • 1Institute of Mechanics, Chinese Academy of Sciences, Beijing0090, China
  • 2School of Engineering Science, University of Chinese Academy of Sciences, Beijing100049, China
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    Vehicles with varying loads deform soft-soil grounds, and the depth of their wheel intrusion is a crucial parameter for evaluating vehicle trafficability on soft soil. This study introduces a novel method that combines the Continuum-Discontinuum Element Method (CDEM) and Material Point Method (MPM) to create a coupling model of wheel and soft-soil interaction and simulate their interaction process. The model analyzes the relationship between different variables, including the wheel load; elastic modulus, strength parameters (cohesion and friction angle), and surface stress of the soft soil; and intrusion depth, to quantify the law of wheel intrusion depth on soft soil. The results indicate that the intrusion depth positively correlates with the wheel load, with a relative variation of approximately 179%, and negatively correlates with the elastic modulus and strength parameters in a non-linear manner, with relative variations of approximately 23% and 164%, respectively. When the wheel load is constant, the intrusion depth is more sensitive to the strength parameters of the soft soil. The three-dimensional relationship established between the strength parameters and intrusion depth provides a theoretical foundation for key parameter measurements in evaluating vehicle trafficability on soft soil.

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    Pengda CHENG, Chun FENG, Ningdong CHANG, Jun ZHOU, Xinguang ZHU. Research on soft ground vehicle intrusion law based on CDEM-MPM coupling model[J]. Optics and Precision Engineering, 2023, 31(5): 707

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    Paper Information

    Category: Trafficability evaluation

    Received: Jul. 27, 2022

    Accepted: --

    Published Online: Apr. 4, 2023

    The Author Email: FENG Chun (fengchun@imech.ac.cn)

    DOI:10.37188/OPE.20233105.0707

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