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http://dx.doi.org/10.14775/ksmpe.2021.20.08.0025

Effects on the Washboarding Phenomenon Based on the Size of the Rotating Body Using a Discrete Element Method  

Lee, Seoungjun (Dept. Mech. Dsgn. Eng., Kumoh Nat. Inst. Tech.)
Park, Junyoung (Dept. Mech. Dsgn. Eng., Kumoh Nat. Inst. Tech.)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.20, no.8, 2021 , pp. 25-32 More about this Journal
Abstract
Washboarding is a crucial problem occurring on unpaved roads. This phenomenon involves the formation of ripples on the surface of the unpaved road and causes a critical problem to vehicles and riders. The phenomenon is affected by several parameters, but we focused on the velocity and the size of the rotating body. In the precedent research, we observed that a critical velocity existed for the occurrence of the phenomenon, and the phenomenon's grade was related to the velocity. Therefore, this study, using a discrete element method, aimed to analyze the relation between the velocity and the size of the rotating body for the occurrence of the phenomenon and perform a fast Fourier transform (FFT) analysis to determine the correlation between the phenomenon and the period. The study observed that the critical velocity could vary from the velocity and the size of the rotating body, and there was a certain range of frequency for the occurrence of the Washboarding phenomenon.
Keywords
Washboarding; Critical Velocity; Rotating Body; Discrete Element Method;
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