Interacting analysis between wheel and sand particles based on DEM and its validation with experiments
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DOI 10.1007/s12206-020-1013-7
Journal of Mechanical Science and Technology 34 (11) 2020 Original Article DOI 10.1007/s12206-020-1013-7 Keywords: · Discrete element method · Multi-body dynamics · Coupled analysis · Wheel-soil interaction
Interacting analysis between wheel and sand particles based on DEM and its validation with experiments Yong-Jae Shin1, Ji-Soo Jeong2, Chul-Woong Jun3 and Jeong-Hyun Sohn4 1
Correspondence to: Jeong-Hyun Sohn [email protected]
Citation: Shin, Y.-J., Jeong, J.-S., Jun, C.-W., Sohn, J.-H. (2020). Interacting analysis between wheel and sand particles based on DEM and its validation with experiments. Journal of Mechanical Science and Technology 34 (11) (2020) 4537~4544. http://doi.org/10.1007/s12206-020-1013-7
Received May 14th, 2020 Revised
August 3rd, 2020
Accepted August 20th, 2020 † Recommended by Editor No-cheol Park
Ground Technology Research Institute, Agency for Defense Development, 170 Jayeo-ro, Dong-eup, 2 Changwon-si, Gyeongnam-do 51504, Korea, Department of Naval Architecture & Marine Systems Engi3 neering, Pukyong National Univ., Busan 48513, Korea, VP Corporation, 6-23, Gwangpyeong-ro 51-gil, 4 Gangnam-gu, Seoul, Korea, Department of Mechanical Design Engineering, Pukyong National Univ., Busan 48513, Korea
Abstract
It is important to understand the dynamic behavior of a wheel under running condition on the off-road to estimate the tire-soil interaction. The discrete element method is widely used to analyze the dynamic behavior of a wheel driven on a sandy road. A contact method between a wheel and numerous particles was developed to carry out simulation. A wheel testbed experimental setup was established for investigating the contact phenomenon between a wheel and sand particles. A high speed camera was used to capture the motion of the wheel. A clustering model for generating arbitrary shape of a particle was developed. The technique for solving multibody dynamics and particle dynamics simultaneously was suggested. The vertical motion of the wheel by computer simulation was compared with experiments. According to results, the relative error and the root mean square error of the vertical displacement are 5.55 % and 6.05 %, respectively. Simulation results show a good agreement with experiments.
1. Introduction
© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2020
There are experimental tests and numerical simulations to evaluate the performance of ground vehicles [1]. Due to the complex process and high cost of experimental tests, numerical simulation technology is widely used to evaluate the dynamic performance of vehicles on offroad conditions. It is necessary to validate system dynamics under realistic operating conditions, such as tire-soil interaction when physical testing is not practical. Compared with the experimental test, the evaluation time of numerical simulation is shorter, and it can quickly build a model of track and ground environment. The simulation results can be used to assess the tractive
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