二系弹簧失效对中部机车车钩垂向稳定性的影响  

Effect of the Secondary Spring Failure on the Vertical Stability of Middle Locomotive Coupler

作　　者：张二田 吴键[1] 凌亮 王开云[1] 苏明亮[2] 逯万春[1] ZHANG Ertian;WU Jian;LING Liang;WANG Kaiyun;SU Mingliang;LU Wanchun(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China;Shuohuang Railway Development Co.,Ltd.,Cangzhou 062350,China)

机构地区：[1]西南交通大学牵引动力国家重点实验室,成都610031 [2]朔黄铁路发展有限公司,河北沧州062350

出　　处：《四川轻化工大学学报（自然科学版）》2022年第5期34-42,共9页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

基　　金：国家自然科学基金杰出青年基金项目(51825504);国家自然科学基金重点项目(51735012)。

摘　　要：建立中部(从控)机车-货车4节短编组全自由度列车动力学模型,通过数值仿真,研究了空气制动缓解情况下,从控机车二系弹簧失效个数与位置对机车车体点头角及连挂车钩间垂向相对位移等动态特性的影响规律。仿真结果表明:与正常情况相比,失效发生在机车前转向架对车钩垂向稳定性的影响更为不利,而发生在后转向架的规律恰好相反。当失效发生在前转向架,且失效个数分别为1、2、3个时,相较于未失效情况,机车车体点头角与连挂车钩间的垂向相对位移均呈增大趋势,且随失效个数的增多而增大。需要注意的是,当失效个数达到两个及以上时,由于二系垂向止挡开始发挥作用,二系弹簧失效导致的车体点头角、连挂车钩垂向相对位移均不再明显增大。A full degrees of freedom dynamics model of four-section short marshalling train for middle(slave) locomotive and its connected wagons is established. The influence of different failure number and position of secondary spring in salve locomotive on the vertical dynamic characteristics of the locomotive car-body pitch angle and the vertical relative displacement between the connected couplers under air-braking release condition is studied through numerical simulation. The simulation results show that the failure occurring on the front bogie of the locomotive has much more adverse impact on the coupler vertical stability, while the influence law of the failure occurring on the rear bogie is opposite to the above situation. Compared with the normal situation, when the failure occurs on the front bogie and the failure number is one, two and three respectively, the pitch angle of locomotive car-body and the vertical relative displacement between the connected couplers are increasing, and increase with the failure number, correspondingly. It should be noted that when the failure number is two or more,the secondary vertical stopper begins to produce a marked effect, resulting in no significant increases in the pitch angle of locomotive car-body and the vertical relative displacement between the connected couplers induced by the failure of the secondary spring.

关 键 词：重载列车 中部机车 二系弹簧失效 车体 车钩 垂向动态稳定性 

分 类 号：U270.11[机械工程—车辆工程]