重载铁路轨道刚度对货物列车抗脱轨安全度的影响  

Effects of track stiffness on freight train anti-derailment safety degree in heavy-haul railway

作　　者：龚凯[1,2] 向俊[1] 余翠英[1,3] Gong Kai;Xiang Jun;Yu Cuiying

机构地区：[1]中南大学土木工程学院,长沙410075 [2]华东交通大学土木建筑学院,南昌330013 [3]南昌理工学院建筑工程学院,南昌330044

出　　处：《东南大学学报（自然科学版）》2017年第1期184-192,共9页Journal of Southeast University：Natural Science Edition

基　　金：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);高等学校博士学科点专项科研基金资助项目(20100162110022);牵引动力国家重点实验室开放课题资助项目(TPL0901;TPL1214);华东交通大学科研启动基金资助项目(2003416034);江西省教育厅科技资助项目(GJJ151173;GJJ151175)

摘　　要：为确定具有预防货物列车脱轨功能的轨道刚度合理值,基于列车轨道系统空间振动计算模型及列车脱轨能量随机分析方法,提出了货物列车-轨道(FTT)系统横向振动稳定性分析方法,分析多组扣件及道床横向刚度组合下FTT系统抗脱轨能力、FTT系统横向振动稳定性及其振动响应的影响.结果表明:FTT系统抗脱轨能力、临界车速及容许极限车速随着扣件及道床横向刚度的增大均有大幅度提高,但当扣件和道床横向刚度分别增大至90和10 MN/m时,其提高幅度逐渐减小,且当扣件和道床横向刚度分别由120 MN/m增至150 MN/m、15 MN/m增至20 M N/m时FTT系统抗脱轨能力、临界车速及容许极限车速仅提高了3.9%,1.8%和1.8%;另外,增大扣件和道床横向刚度有助于减小轨道横向位移.考虑日趋紧张的重载铁路市场竞争,建议扣件横向刚度取90~120 MN/m,道床横向刚度取10~15 MN/m.For the determination of the reasonable range of track stiffness to prevent the freight train derailment,the analysis method for the lateral vibration stability of freight train-track(FTT)system was proposed based on the train-track spatial vibration calculation model and the random energy analysis method for the train derailment.The anti-derailment capacity,the lateral vibration stability and the corresponding vibration response in FTT system on the multiple combination of the fastener and ballast bed lateral stiffnesses were analyzed.Results show that the anti-derailment capacity,critical speed and allowable limit speeds of the FTT system are significantly increased with the increase of the fastener and ballast bed lateral stiffnesses;while the fastener and ballast bed lateral stiffnesses,respectively,increase to90MN/m and10M N/m,the increased amplitudes decrease.Meanwhile,when the fastener and ballast bed lateral stiffnesses,respectively,increase from120MN/m to150M N/m,and from15MN/m to20M N/m,the anti-derailment capacity,critical and allowable limit speeds of the FTT system are increased by only3.9%1.8%and1.8%,respectively.Moreover,increasing the lateral stiffnesses of the fastener and the ballast bed contributes to reducing the lateral displacement of the track structure.In conclusion,considering the rigorous market competition of heavy-haul railway,it is suggested that the fasteners lateral stiffness and the ballast bed lateral stiffness should be from90MN/m to120MN/m and from10MN/m to15M N/m,respectively.

关 键 词：铁道工程 重载铁路 轨道刚度 FTT系统横向振动稳定性 货物列车 

分 类 号：U213.2[交通运输工程—道路与铁道工程]