Feasibility in assessing the dipped rail joint defects through dynamic response of heavy haul locomotive  

作　　者：Yan Quan Sun Maksym Spiryagin Qing Wu Colin Cole Wei Hua Ma 

机构地区：[1]Centre for Railway Engineering, Central Queensland University [2]State Key Laboratory of Traction Power, Southwest Jiaotong University

出　　处：《Journal of Modern Transportation》2018年第2期96-106,共11页现代交通学报（英文版）

基　　金：the support of the Centre for Railway Engineering, Central Queensland University;the support from State Key Laboratory of Traction Power, Southwest Jiaotong University in the Open Projects: TPL1504, ‘Study on heavy haul train and coupler system dynamics’

摘　　要：The feasibility of monitoring the dipped rail joint defects has been theoretically investigated by simulating a locomotive-mounted acceleration system negoti- ating several types of dipped rail defects. Initially, a comprehensive locomotive-track model was developed using the multi-body dynamics approach. In this model, the locomotive car-body, bogie frames, wheelsets and driving motors are considered as rigid bodies; track modelling was also taken into account. A quantitative relationship between the characteristics （peak-peak values） of the axle box accelerations and the rail defects was determined through simulations. Therefore, the proposed approach, which combines defect analysis and comparisons with theoretical results, will enhance the ability for long-term monitoring and assessment of track systems and provides more informed preventative track maintenance strategies.The feasibility of monitoring the dipped rail joint defects has been theoretically investigated by simulating a locomotive-mounted acceleration system negoti- ating several types of dipped rail defects. Initially, a comprehensive locomotive-track model was developed using the multi-body dynamics approach. In this model, the locomotive car-body, bogie frames, wheelsets and driving motors are considered as rigid bodies; track modelling was also taken into account. A quantitative relationship between the characteristics （peak-peak values） of the axle box accelerations and the rail defects was determined through simulations. Therefore, the proposed approach, which combines defect analysis and comparisons with theoretical results, will enhance the ability for long-term monitoring and assessment of track systems and provides more informed preventative track maintenance strategies.

关 键 词：Axle box accelerations Track monitoring Dipped rail defects Simulations 

分 类 号：U216.3[交通运输工程—道路与铁道工程]