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Dynamic Interaction of Vehicle and Discontinuous Slab Track Considering Nonlinear Hertz Contact Model
| 题名： | Dynamic Interaction of Vehicle and Discontinuous Slab Track Considering Nonlinear Hertz Contact Model |
| 正文语种： | 英文 |
| 作者： | Iran Univ;Shahid Chamran Univ |
| 作者单位： | Javad Sadeghi;Amin Khajehdezfuly;Morteza Esmaeili;Davood Poorveis |
| 关键词： | Discontinuous slab track; Nonlinear hertz contact; Rolling stock; Railway modeling |
| 摘要： | This paper develops a new two-dimensional numerical model of vehicle/discontinuous slab track dynamic interaction. The vehicle is simulated as a multibody system with 10 degrees of freedom. The slab track is represented by a three-layer model that consists of a continuous rail layer, a discontinuous concrete slab layer, and a continuous concrete base layer. All the slab track layers are modeled by Euler-Bernoulli beam elements with finite lengths. In the New Model (NM), the wheel/rail con tact is modeled by nonlinear Hertz springs for the first time. This results in an improvement in the modeling of the slab track/rolling-stock dynamic interaction. The governing differential equations of the model are derived in the time domain and solved in a coupled form. Through several numerical examples, the accuracy and the computational efficiency of the NM in various vehicle/slab track conditions is illustrated. |
| 出版年： | 2016 |
| 期刊名称： | Journal of Transportation Engineering |
| 卷： | Vol.142 |
| 期： | No.4 |
| 页码： | 04016011 |
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