西华大学学报（自然科学版）2024，Vol.43Issue(5)：67-73,7.DOI:10.12198/j.issn.1673-159X.5254
重载组合列车中部机车车钩自由角对轮轨动态相互作用影响分析
Analysis of the Impact of the Middle Locomotive Coupler Free Angle on Wheel-rail Dynamic Interaction in Heavy Haul Train Combinations
摘要
Abstract
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 later-al 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 re-ducing the longitudinal impulse during train operation are of significant importance for ensuring the safe operation of the train.关键词
2万吨重载组合列车/机车/车钩自由角/车钩摆角Key words
20 000-ton heavy-haul combined freight trains/locomotive/coupler free angle/coupler swing angle分类
交通工程引用本文复制引用
魏修奇,徐彬倢,曾东亮,王开云..重载组合列车中部机车车钩自由角对轮轨动态相互作用影响分析[J].西华大学学报（自然科学版）,2024,43(5):67-73,7.基金项目
国家自然科学基金项目(52388102、51825504). （52388102、51825504）
