摘要
研究设计一种针对有轨电车的可拆卸埋地轨道系统的结构,该轨道系统包括有轨电车槽型钢轨的轨腰橡胶护套、防水垫层、专用扣件以及可拆卸的现浇水泥道床。通过Nastran及Simpack对现代有轨电车的车辆和轨道系统建模分析,利用Nastran软件分析埋入式轨道系统在车辆运营条件下和横向汽车碾压时的受力状态,考察轨道系统在这两种工况下的安全性;利用Simpack软件系统分析有轨电车以最大时速70 km/h运行在传统轨道系统和新式埋地轨道系统上时的动态响应,在无轨道激励时,现代轨道系统上车辆左右两轮轮轨垂向力的偏差值比在普通轨道上的轮轨力差值最多可减小5.9 k N,脱轨系数可减小0.10;在美国5级谱轨道激励下,轮轨垂向力的偏差值比在普通轨道上的轮轨力差值最多可减小8.9 k N,脱轨系数可减小0.16;可知轨道系统保证车辆运行安全的同时实现埋地轨道扣件的简便维修及更换等特点,同时降低车辆运行时的轮轨响应。
A removable structure for the tramway track system of modern trams was described. This track system includes rubber casings, a waterproof cushion, special fasteners and a removable road bed. Tram vehicles and tracks were modeled and analyzed by using MSC Nastran and Simpack. The static and dynamic responses of the structure to the tram operating and the road vehicle rolling loads were analyzed by finite element method. The results show that the rail head lateral deflection is less than 2 mm and meets the rail safety criteria. The track-vehicle dynamic simulation software Simpack was used to predict the dynamic behavior of the tram on the traditional tramway system with maximum speed of 70 km/h.The analysis show that without track excitation, the vertical force discrepancy on the tram rail can be reduced by 5.9 k N comparing with that on the traditional track, while derailment coefficient decreases by 0.10. When the track is subjected to level FTA 5 excitation, the maximum reduction of the vertical force discrepancy with tram rail is 8.9 k N less than that on the traditional rail, while the derailment coefficient decreases by 0.16. So, the removable rail system can ensure the safe operation of the vehicles when the fasteners of the system are being simply maintained and replaced. Meanwhile, the dynamic response of the wheel and rail can be reduced.
作者
张喆玉
黄承
樊永欣
ZHANG Zheyu;HUANG Cheng;FAN Yongxin(Luoyang Ship Material Research Institute, Luoyang 471003, Henan China)
出处
《噪声与振动控制》
CSCD
2018年第A01期30-34,共5页
Noise and Vibration Control
关键词
振动与波
有轨电车
轨道交通
动态特性
vibration and wave
modem tram
rail transit
dynamic characteristics
