| LI Ying.Causes of low Rail Corrugation and Little high Rail Corrugation in Minor Radius Curve Route[J],46(8):134-139 |
| Causes of low Rail Corrugation and Little high Rail Corrugation in Minor Radius Curve Route |
| Received:March 01, 2017 Revised:August 20, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.08.022 |
| KeyWord:corrugation wear wheel-rail system frictional vibration |
| Author | Institution |
| LI Ying |
School of Information Technology, Shangqiu Normal University, Shangqiu , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to study causes of inner rail corrugation and little outer rail corrugation in minor radius curve route. A frictional self-induced vibration model was established for wheel-rail system consisting of a wheel, a rail and several sleepers was established based upon the opinion that rail corrugation was caused by frictional self-induced vibration of the wheel-rail system. In the model, the contact geometrical relationship between the wheel and rail was set to values from SIMPACK vehicle dynamics simulating calculation when a vehicle passed through a R=350 m curve, connections between steel rail and sleeper, sleeper and ballast bed were simulated with two different springs and damping element groups. Generation tendency of frictional self-induced vibration was analyzed numerically for the model in complex eigenvalue method. As contact angle between low rail and wheel was small in minor-radius curve, the frictional self-induced vibration might easily took place under the effects of saturated creep force (i.e., frictional force), hence corrugation might easily occurred; as contact angle between high rail and wheel was big, the frictional self-induced vibration might not easily took place under the effects of saturated creep force (i.e., frictional force), hence corrugation seldom occurred. Numerical prediction results were consistent with actual situation of corrugation. Saturation of creep force and contact angle between the wheel and rail are two main factors leading to difference between inner rail and outer rail in minor-radius curve. Saturation of creep force, which suggests that the wheel slips on the rail, is the decisive factor. If the wheel-rail creep force is not saturated, frictional self-induced vibration will not occur in the wheel-rail system, thus no rail corrugation occurs as well. |
| Close |
|
|
|