ANALYSIS ON EVOLUTION OF INITIAL

RAIL CORRUGATION

XIONG Jiayang  JIN Xuesong

(State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031)

Abstract: A model of rail corrugation calculation is put forward. The model considers a combination of a Non-Hertzian rolling contact theory of wheel/rail system, rail material wear model and a coupling dynamics of rail vehicle/track in the vertical and lateral directions. A corresponding numerical method is developed to analyze evolution of the initial rail corrugation with different wavelength with an increase of passenger car passage. When the 4 wheels of a same bogie roll over the rails with the same initial corrugation, the wave-depth, passing frequencies and phases of the initial corrugation in development are calculated. The numerical results obtained indicate that:  = 1 \* GB3 ①The wave-depth of the initial corrugation with an fixing wavelength decreases with an increase of the passenger car passage, the initial corrugation passed by the leading wheelset decays much more than that passed by the trailing wheelset.  = 2 \* GB3 ② The evolution of the initial corrugations has a tendency to move forward.  = 3 \* GB3 ③ After the leading wheelset rolls over the rails with the initial corrugation with a fixing wavelength repeatedly the initial corrugation gradually changes. The new corrugation gradually forms and presents two wavelengths.  = 4 \* GB3 ④ Under the condition of the passenger car passage increase, the smaller the wavelength of the initial corrugation is, and the faster the wave-depth of the initial corrugation attenuates.

Key words: Rail corrugation  Evolution  Rolling contact   Material wear  Vehicle/track dynamics

CLC No: U211

全国百篇优秀博士学位论文作者专项基金(200248)和教育部创新团队执行计划(IRT0452)资助项目 . Received 20050703, received in revised form 20051220