Influence of Traction and Braking Operation on Wheel-Rail Dynamic Interaction for Heavy Haul Locomotive

被引：2
|
作者：
Liu P. [1 ,2 ]
Wang K. [2 ]
Zhang D. [2 ]
机构：
[1] School of Mechanical Engineering, Shijiazhuang Tiedao University, Shijiazhuang, 050043, Hebei
[2] State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, 610031, Sichuan
来源：
| 2017年 / Chinese Academy of Railway Sciences卷 / 38期
关键词：
Coupler and draft gear system; Heavy haul locomotive; Traction and braking; Vehicle-track coupling dynamics; Wheel-rail force;
D O I：
10.3969/j.issn.1001-4632.2017.02.15
中图分类号：
学科分类号：
摘要：
Based on the train longitudinal dynamics theory and vehicle-track coupling dynamics theory, the heavy haul train and track coupling dynamic model considering the longitudinal, lateral and vertical forces in the coupler and draft gear system was established. Taking a locomotive traction 10 000 t train as the inspection condition, the mechanical properties of the locomotive in the traction and braking conditions were analyzed. The influence processes and degrees of traction force, braking force and coupler force on the running performance of locomotive were studied. And the theoretical model was validated by train test. Results indicate that the wheel load of locomotive on straight line is respectively decreased about 13, 7 and 4 kN under traction, electric braking and emergency braking compared with that under idle running condition. The pure traction or braking force can reduce wheel-rail lateral creep force, which indirectly induces a slight increase of wheel-rail lateral force, but the wheel-axle lateral force is unchanged. Through the coupler rotation angle, the coupler force can produce transverse component, which transfers to the wheel-rail interface to change the overall variation trend of wheel-axle lateral force. In electric braking condition, the front locomotive is subjected to a larger compressive coupler force and causes 18 kN increase in wheel-axle lateral force when the coupler has a 3° rotation angle. However, in emergency braking condition, the compressive coupler force acting on the locomotive is small, which causes the wheel-axle lateral force increase by less than 8 kN. © 2017, Editorial Department of China Railway Science. All right reserved.
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页码：96 / 104
页数：8
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