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作 者:魏修奇 徐彬倢 曾东亮 王开云[1] WEI Xiuqi;XU Binjie;ZENG Dongliang;WANG Kaiyun(State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu 610031 China)
机构地区:[1]西南交通大学轨道交通运载系统全国重点实验室,四川成都610031
出 处:《西华大学学报(自然科学版)》2024年第5期67-73,共7页Journal of Xihua University:Natural Science Edition
基 金:国家自然科学基金项目(52388102、51825504)。
摘 要:针对2万吨重载组合列车中部机车的运行安全性问题,基于102型机车车钩结构特性,建立“1+1”编组形式的重载组合列车动力学模型,探究车钩自由角对轮轨动态相互作用的影响规律。此外,结合机车轮轴横向力的限值,进一步分析不同线路条件下机车的抗压钩能力。计算结果表明:2万吨重载组合列车的中部机车在纵向压钩力作用下,车钩自由角的大小对列车运行安全性指标有显著影响,列车各项运行安全性指标随着车钩自由角增加而显著增大;在直线制动工况下,且当机车车钩自由角达8°时,压钩力超过800 kN将导致轮轴横向力超限;在R300m小半径曲线制动工况下,车钩自由角达7°时,压钩力600 kN将导致机车轮轴横向力超限。因此,合理控制车钩自由角,同时降低列车运行时的纵向冲动对保障列车安全运行具有重大意义。To address the operational safety issues of the mid-locomotive in a 20,000-ton heavy-duty combined train,a dynamic model of the heavy-duty combined train in a"1+1"formation was established based on the structural characteristics of the 102-type locomotive coupler.The study explored the influence patterns of the coupler's free angle on the wheel-rail dynamic interaction.Additionally,considered the lateral force limit of the locomotive wheelset,an analysis was conducted to further examine the compressive coupler capacity of the locomotive under different track conditions.The computational results reveal that,under the longitudinal coupler force in the 20,000-ton heavy-duty combined train,the size of the coupler's free angle significantly affects the safety indicators of the train's operation.Various safety indicators of the train increase significantly with the increase in the coupler's free angle.Specifically,under straight-line braking conditions,when the locomotive coupler's free angle reaches 8°,coupler forces exceeding 800 kN result in the lateral force of the wheelset exceeding the limit.In the case of braking on a small-radius curve with a radius of 300 m and a coupler free angle of 7°,a coupler force of 600 kN leads to the locomotive's wheelset lateral force exceeding the limit.Therefore,controlling the coupler's free angle reasonably and reducing the longitudinal impulse during train operation are of significant importance for ensuring the safe operation of the train.
分 类 号:U239.4[交通运输工程—道路与铁道工程]
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