Dynamic Response of Wheel-Rail Interaction at Rail Weld in High-Speed Railway

作者：An, Boyang; Wang, Ping; Xiao, Jieling; Xu, Jingmang^*; Chen, Rong^*

来源：Shock and Vibration, 2017, 2017: 5634726.

DOI：10.1155/2017/5634726

• GROUND VIBRATIONS
• ROLLING-CONTACT
• GEOMETRY
• FATIGUE
• TRAIN

As amain part of continuouslywelded rail track, railweldwidely exists in high-speed railway. However, short-wave irregularities can easily initiate and develop in railweld due to the limitation ofwelding technology and thus railweld has been a main high-frequency excitation and is responsible for deterioration of track components. Thiswork reports a 3D finite elementmodel ofwheel-rail rolling contact which can simulate dynamic wheel-rail interaction at arbitrary contact geometry up to 400 km/h. This model is employed to investigate dynamic response of wheel-rail interaction at theoretical andmeasured rail weld, including wheel-rail force and axlebox acceleration. These simulation results, combinedwithQuality Index (QI) method, are used to develop a quantitative expression, which can be easily applied for evaluating rail weld deterioration based on measured rail profiles and axle-box acceleration.

• 出版日期2017
• 单位西南交通大学