Original scientific paper
https://doi.org/10.31534/engmod.2018.3.ri.03m
Modelling vibratory roller–soil system dynamics using discrete element method
Jian Wang
; School of Highway, Chang'an University, Xi'an, Shannxi Province, CHINA; School of Civil and Transportation Engineering, Henan University of Urban Construction, Pingdingshan, Henan, CHINA
Aimin Sha
; Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an, Shaanxi, CHINA
Liqun Hu
; Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an, Shaanxi, CHINA
Abstract
A simple yet useful implementation of lumped-parameter models using the discrete element method is discussed in this paper. Lumped-parameter models are often used in the modelling of vibratory roller-soil systems owing to their ability to capture the essential features observed during roller-soil vibrations. In order to investigate the system behaviour in the event of a decoupling (loss of contact between the drum and the soil), two conditions pertaining to the transition between the contact and non-contact phases are compared in the light of simulation results. The results demonstrate significant differences in the roller-soil system behaviour based on operating conditions. One particular case provides an unrealistic estimate of the contact force, and thus may lead to an incorrect prediction of the system dynamics. Another solution, however, provides a reasonable estimate of the system dynamics and is recommended herein.
Keywords
lumped-parameter model; discrete element method; vibratory roller–soil system.
Hrčak ID:
218239
URI
Publication date:
26.3.2019.
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