东南大学学报（自然科学版）2017，Vol.47Issue(1)：184-192,9.DOI:10.3969/j.issn.1001-0505.2017.01.031
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
摘要
Abstract
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 anal-ysis 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 to 90 MN/m and 10 MN/m,the increased amplitudes decrease.Meanwhile, when the fastener and ballast bed lateral stiffnesses,respectively,increase from 120 MN/m to 150 MN/m,and from 15 MN/m to 20 MN/m,the anti-derailment capacity,critical and allowable limit speeds of the FTT system are increased by only 3 .9% 1 .8% and 1 .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 stiff-ness should be from 90 MN/m to 120 MN/m and from 10 MN/m to 15 MN/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Key words
railway track engineering/heavy-haul railway/track stiffness/lateral vibration stability on freight train-track system/freight train分类
交通工程引用本文复制引用
龚凯,向俊,余翠英..重载铁路轨道刚度对货物列车抗脱轨安全度的影响[J].东南大学学报（自然科学版）,2017,47(1):184-192,9.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）、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）． （）
