中南大学学报（自然科学版）2017，Vol.48Issue(8)：2152-2161,10.DOI:10.11817/j.issn.1672-7207.2017.08.024
有砟及无砟轨道结构对货物列车运行安全性的影响
Influence on freight train operation safety for ballasted and ballastless track
摘要
Abstract
On the basis of the freight train-ballasted and ballastless track system spatial vibration calculation model,using the random energy analysis method of train derailment,the whole train derailment course for the ballasted and ballastless track was calculated respectively.The lateral vibration ultimate resistance working on two train-track systems and the corresponding dynamic responses was obtained.Meanwhile,the freight train running safety and the spatial vibration characteristics for ballasted and ballastless train-track system were analyzed.The results show that compared with the ballasted track,the anti-derailment ability of ballastless track is improved by 45.9％,and the car body vertical Sperling stability index,the wheelset lateral force and the wheel-rail vertical force are reduced by 73.5％,22.1％ and 27.3％,respectively,when the train speed is 90 km/h.Moreover,the lateral displacement and acceleration of all the ballastless track components are much smaller than those of the ballasted track,while the rail vertical displacement of the ballastless track is larger.However,as the vertical displacement of ballastless track is taken by fastenings,the vertical displacement transferred from rail to roadbed slab is attenuated by 75.3％ on this account.The vertical acceleration of ballastless track is larger than that of ballasted track,the vibration and noise have more influence on the surrounding buildings.The ballastless track is recommended to be adopted in priority for the heavy-haul railway line design,but the vibration and noise reduction measurements should be taken on both sides of the track line.关键词
铁道工程/有砟轨道/无砟轨道/货物列车/安全性Key words
railway track engineering/ballasted track/ballastless track/freight train/safety分类
交通工程引用本文复制引用
龚凯,向俊,毛建红,余翠英..有砟及无砟轨道结构对货物列车运行安全性的影响[J].中南大学学报（自然科学版）,2017,48(8):2152-2161,10.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(TPL0901,TPL1214)(Project(U1261113) jointly supported by the National Natural Science Foundation of China and Shenhua Group Corporation Limited （TPL0901,TPL1214）
Project(20100162110022) supported by 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）
