Numerical modelling of granular materials with spherical discrete particles and the bounded rolling friction model. Application to railway ballast

Irazabal Joaquin; Salazar Fernando; Onate Eugenio

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Numerical modelling of granular materials with spherical discrete particles and the bounded rolling friction model. Application to railway ballast

机译：具有球形离散颗粒的粒状材料的数值模拟和有界滚动摩擦模型。应用于铁路道ast

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摘要

The Discrete Element Method (DEM) was found to be an effective numerical method for the calculation of engineering problems involving granular materials. However, the representation of irregular particles using the DEM is a very challenging issue, leading to different geometrical approaches. This document presents a new insight in the application of one of those simplifications known as rolling friction, which avoids excessive rotation when irregular shaped materials are simulated as spheric particles. This new approach, called the Bounded Rolling Friction model, was applied to reproduce a ballast resistance test. (C) 2017 Elsevier Ltd. All rights reserved.

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《Computers and Geotechnics》 |2017年第5期|220-229|共10页
作者
Irazabal Joaquin; Salazar Fernando; Onate Eugenio;
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作者单位

Int Ctr Numer Methods Engn CIMNE, Barcelona, Spain;

Int Ctr Numer Methods Engn CIMNE, Barcelona, Spain;

Int Ctr Numer Methods Engn CIMNE, Barcelona, Spain|Polytech Univ Catalonia UPC, Barcelona, Spain;

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正文语种 eng
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Discrete element method; Bounded rolling friction model; Rolling resistance torque; Railway ballast; Railway track stability;

机译：离散元法有限滚动摩擦模型滚动阻力扭矩铁路道ast铁路轨道稳定性;

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2. Investigation of modeling non-spherical particles by using spherical discrete element model with rolling friction [J] . Xie Changhua, Ma Huaqing, Zhao Yongzhi Engineering analysis with boundary elements . 2019,第AUGa期

机译：用滚动摩擦的球面离散单元模型模拟非球面颗粒的研究。
3. Investigation of modeling non-spherical particles by using spherical discrete element model with rolling friction [J] . Xie Changhua, Ma Huaqing, Zhao Yongzhi Engineering analysis with boundary elements . 2019,第Auga期

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4. Particle descriptions and grain contact laws for Lunar materials: Their implementation in a discrete element model. [C] . D.M. Cole, M.A. Hopkins, L. Taylor EARTH and SPACE 2012;ASCE Aerospace Division conference on engineering, construction, and operations in challenging environments;NASA/ASCE workshop on granular materials in space exploration . 2012

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7. Discrete element modelling of railway ballast performance considering particle shape and rolling resistance [O] . Yunlong Guo, Chunfa Zhao, Valeri Markine, 2020

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Numerical modelling of granular materials with spherical discrete particles and the bounded rolling friction model. Application to railway ballast

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