DEM Analysis of Track Ballast for Track Ballast–Wheel Interaction Simulation
This study aims to suggest a rational analysis method for a track ballast–wheel interaction that could be further developed to model the interaction in a train-derailment event, based on the discrete-element method (DEM). Track ballast is filled with gravel to form the trackbed. Although finite-elem...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-04-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/10/8/2717 |
| _version_ | 1797570622904074240 |
|---|---|
| author | Nam-Hyoung Lim Kyoung-Ju Kim Hyun-Ung Bae Seungjun Kim |
| author_facet | Nam-Hyoung Lim Kyoung-Ju Kim Hyun-Ung Bae Seungjun Kim |
| author_sort | Nam-Hyoung Lim |
| collection | DOAJ |
| description | This study aims to suggest a rational analysis method for a track ballast–wheel interaction that could be further developed to model the interaction in a train-derailment event, based on the discrete-element method (DEM). Track ballast is filled with gravel to form the trackbed. Although finite-element analysis (FEA) is widely applied in structural analysis, track ballast cannot be analyzed using conventional FEA because this approach does not allow separation of elements that share nodes. The DEM has been developed to analyze the dynamic behavior of separable objects, assuming that the objects are rigid. Therefore, track ballast can be modeled as separable rigid pieces of gravel, and its dynamic behavior can be analyzed using a rational contact model. In this study, a rational numerical strategy for track ballast–wheel interaction was investigated using the DEM approach. The suggested analysis method was validated through comparison with the experimental results of a drop test. In addition, case studies were conducted to investigate the effects of the contact-model parameters on the simulation result. |
| first_indexed | 2024-03-10T20:28:12Z |
| format | Article |
| id | doaj.art-7b2c0e297cb840c0b2cb201f963e7f72 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T20:28:12Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-7b2c0e297cb840c0b2cb201f963e7f722023-11-19T21:38:59ZengMDPI AGApplied Sciences2076-34172020-04-01108271710.3390/app10082717DEM Analysis of Track Ballast for Track Ballast–Wheel Interaction SimulationNam-Hyoung Lim0Kyoung-Ju Kim1Hyun-Ung Bae2Seungjun Kim3Department of Civil Engineering, Chungnam National University, Daejeon 34134, KoreaRoad Kinematics Co., Ltd., Cheonan 31094, KoreaRoad Kinematics Co., Ltd., Cheonan 31094, KoreaSchool of Civil, Environmental, and Architectural Engineering, Korea University, Seoul 02841, KoreaThis study aims to suggest a rational analysis method for a track ballast–wheel interaction that could be further developed to model the interaction in a train-derailment event, based on the discrete-element method (DEM). Track ballast is filled with gravel to form the trackbed. Although finite-element analysis (FEA) is widely applied in structural analysis, track ballast cannot be analyzed using conventional FEA because this approach does not allow separation of elements that share nodes. The DEM has been developed to analyze the dynamic behavior of separable objects, assuming that the objects are rigid. Therefore, track ballast can be modeled as separable rigid pieces of gravel, and its dynamic behavior can be analyzed using a rational contact model. In this study, a rational numerical strategy for track ballast–wheel interaction was investigated using the DEM approach. The suggested analysis method was validated through comparison with the experimental results of a drop test. In addition, case studies were conducted to investigate the effects of the contact-model parameters on the simulation result.https://www.mdpi.com/2076-3417/10/8/2717track ballastgravelDEMexplicit dynamicscontact modeldrop test |
| spellingShingle | Nam-Hyoung Lim Kyoung-Ju Kim Hyun-Ung Bae Seungjun Kim DEM Analysis of Track Ballast for Track Ballast–Wheel Interaction Simulation Applied Sciences track ballast gravel DEM explicit dynamics contact model drop test |
| title | DEM Analysis of Track Ballast for Track Ballast–Wheel Interaction Simulation |
| title_full | DEM Analysis of Track Ballast for Track Ballast–Wheel Interaction Simulation |
| title_fullStr | DEM Analysis of Track Ballast for Track Ballast–Wheel Interaction Simulation |
| title_full_unstemmed | DEM Analysis of Track Ballast for Track Ballast–Wheel Interaction Simulation |
| title_short | DEM Analysis of Track Ballast for Track Ballast–Wheel Interaction Simulation |
| title_sort | dem analysis of track ballast for track ballast wheel interaction simulation |
| topic | track ballast gravel DEM explicit dynamics contact model drop test |
| url | https://www.mdpi.com/2076-3417/10/8/2717 |
| work_keys_str_mv | AT namhyounglim demanalysisoftrackballastfortrackballastwheelinteractionsimulation AT kyoungjukim demanalysisoftrackballastfortrackballastwheelinteractionsimulation AT hyunungbae demanalysisoftrackballastfortrackballastwheelinteractionsimulation AT seungjunkim demanalysisoftrackballastfortrackballastwheelinteractionsimulation |