Research Article
High-Speed Train-Track-Bridge Dynamic Interaction considering Wheel-Rail Contact Nonlinearity due to Wheel Hollow Wear
Table 1
Degrees of freedom of the vehicle.
| Component | Type of motion | Longitudinal | Lateral | Vertical | Roll | Pitch | Yaw |
| Car body | Xc | Yc | Zc | ϕc | βc | Ψc | Bogie frame (i = 1∼2) | Xti | Yti | Zti | ϕti | βti | Ψti | Axle box (i = 1∼8) | — | — | — | — | βai | — | Wheel set (i = 1∼4) | Xwi | Ywi | Zwi | ϕwi | βwi | Ψwi |
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