中南大学学报（自然科学版）2017，Vol.48Issue(12)：3406-3414,9.DOI:10.11817/j.issn.1672-7207.2017.12.035
重载铁路桥上货物列车脱轨预防措施
Derailment precautions of freight train on bridge in heavy haul railway
摘要
Abstract
Considering the general structure characteristics of bridges in heavy haul railway, the freight train-track-bridge(FTTB) system spatial vibration calculation model was established. Meanwhile, based on the random energy analysis theory of train derailment, the analysis method of lateral vibration stability of FTTB system was proposed. Through a calculation example, the lateral vibration stability and the corresponding vibration response of FTTB system before and after the reinforcement of the circular pier were calculated. The results show that the anti-derailment capacity of FTTB system increases by 50％ after the circular pier reinforcement in the calculation example. Before and after the circular pier reinforcement, the lateral vibration critical speed of FTTB system is 134.45 km/h and 156.99 km/h, and the admissible limit speed is 107.56 km/h and 125.59 km/h, respectively. After the reinforcement, the operation stability of freight train is guaranteed when the freight train passes over the bridge with speed of 80 km/h. Moreover, the lateral displacements of the bridge mid-span and the top of the pier are reduced by 54.5％ and 83.8％, respectively, comparedwith those before the reinforcement. In conclusion, this method reflects not only the freight train derailment information but also the spatial vibration characteristic of FTTB system. It can provide more comprehensive and scientific evaluation for the derailment precautions of the freight train.关键词
铁道工程/重载铁路/货物列车/横向振动Key words
railway track engineering/heavy haul railway/freight train/lateral vibration分类
交通工程引用本文复制引用
龚凯,向俊,毛建红,余翠英..重载铁路桥上货物列车脱轨预防措施[J].中南大学学报（自然科学版）,2017,48(12):3406-3414,9.基金项目
国家自然科学基金委员会与神华集团有限公司联合资助项目(U1261113) （U1261113）
高等学校博士学科点专项科研基金资助项目(20100162110022) （20100162110022）
牵引动力国家重点实验室开放课题资助项目(TPL0901,TPL1214) （TPL0901,TPL1214）
江西省青年科学基金资助项目(20142BAB216003) (Project(U1261113) jointly supported by the National Natural Science Foundation Committed of China and Shenhua Group Corporation Limited （20142BAB216003）
Project(20100162110022) supported by the Special Fund for Doctor Programs in Institutions of Higher Learning of China （20100162110022）
Projects (TPL0901,TPL1214) supported by the Open Program of the Traction Power State Key Laboratory （TPL0901,TPL1214）
Project(20142BAB216003) supported by Science Foundation of Jiangxi Province for Youths) （20142BAB216003）
