Dynamic Response of Wheel-Rail Interaction at Rail Weld in High-Speed Railway. (7th December 2017)

• Record Type: Journal Article
• Authors: An, Boyang; Wang, Ping; Xiao, Jieling; Xu, Jingmang; Chen, Rong
• Other Names: Tao Chao Academic Editor.
• Is Part Of: Shock and vibration. Volume 2017(2017)
• Publication Date: 2017-12-07
• Subjects: Shock (Mechanics) -- Periodicals; Vibration -- Periodicals; 534.5
• DOI: 10.1155/2017/5634726
• Languages: English
• ISSNs: 1070-9622

Abstract

Abstract : As a main part of continuously welded rail track, rail weld widely exists in high-speed railway. However, short-wave irregularities can easily initiate and develop in rail weld due to the limitation of welding technology and thus rail weld has been a main high-frequency excitation and is responsible for deterioration of track components. This work reports a 3D finite element model of wheel-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 and measured rail weld, including wheel-rail force and axle-box acceleration. These simulation results, combined with Quality 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.