Computation of wheel–rail contact force for non-mapping wheel–rail profile of Translohr tram |
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Authors: | Yuanjin Ji Jinsong Zhou |
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Institution: | Rail Transit Institute of Tongji University, Shanghai, People's Republic of China |
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Abstract: | Translohr tram has steel wheels, in V-like arrangements, as guide wheels. These operate over the guide rails in inverted-V arrangements. However, the horizontal and vertical coordinates of the guide wheels and guide rails are not always mapped one-to-one. In this study, a simplified elastic method is proposed in order to calculate the contact points between the wheels and the rails. By transforming the coordinates, the non-mapping geometric relationship between wheel and rail is converted into a mapping relationship. Considering the Translohr tram’s multi-point contact between the guide wheel and the guide rail, the elastic-contact hypothesis take into account the existence of contact patches between the bodies, and the location of the contact points is calculated using a simplified elastic method. In order to speed up the calculation, a multi-dimensional contact table is generated, enabling the use of simulation for Translohr tram running on curvatures with different radii. |
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Keywords: | Non-mapping wheel–rail contact elastic contact Translohr tram |
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