铁道标准设计2025，Vol.69Issue(6)：55-60,142,7.DOI:10.13238/j.issn.1004-2954.202310230003
重载铁路曲线地段整正前后车辆-轨道动力学特性研究
Study on Vehicle-Track Dynamic Characteristics Before and After Realignment in Heavy-Haul Railway Curves
摘要
Abstract
To address the issue of abnormal curve radii in the curve sections of heavy-haul railways,a heavy-haul train-track dynamic coupling model was established based on multibody dynamics theory.By incorporating surveyed data of curve radius anomalies,the effects of curve radius and its abnormal variations on vehicle-track dynamic characteristics were investigated.The results showed that under long-term complex operating conditions,the maximum alignment value in small-radius curve sections could reach 91 mm,with a curve radius anomaly of approximately 6 m.When radius anomalies occurred in small-radius curve sections,an increase in radius anomaly had a greater effect on the vertical and lateral forces of the inner rail,whereas the vertical and lateral forces of the outer rail were more affected by a decrease in radius anomaly.When the radius anomaly reached 9 m,the lateral forces of the inner and outer rails increased by 36.16%and 58.72%,respectively,and the derailment coefficient and wheel load reduction rate increased by 91%and 242%,respectively.Even minor variations in curve radius could significantly affect train operational safety.Moreover,increases in radius anomaly had less effect on the acceleration changes of vehicle components than decreases.The larger the curve radius,the smaller the effect of radius anomalies on wheel-rail forces,safety coefficients,and the accelerations of the vehicles and bogies.Since the wheelsets were in direct contact with the rails,the change of wheelset acceleration was greatly affected by curve radius.After curve realignment,the maximum vertical and lateral wheel-rail forces could be reduced by 12.5 kN and 10.69 kN,respectively.The derailment coefficient,wheel load reduction rate,and car body acceleration reduced by 42%,69%,and 73%,respectively.The variations in the vertical acceleration of bogie and wheelset were approximately 0.186g and 4.00g,respectively.关键词
重载铁路/曲线整正/小半径曲线/半径异常/动力学耦合模型/动力特性Key words
heavy-haul railway/curve realignment/small-radius curve/radius anomaly/dynamic coupling model/dynamic characteristics分类
交通运输引用本文复制引用
马瑞峰,蔡小培,王雨琪,辛源,李金辉..重载铁路曲线地段整正前后车辆-轨道动力学特性研究[J].铁道标准设计,2025,69(6):55-60,142,7.基金项目
国家自然科学基金项目(52178405) （52178405）
国家能源集团铁路装备有限责任公司科技创新项目(TZKY-21-11) （TZKY-21-11）
