Influence of anti-yaw damper's service degradation characteristics on high-speed EMU's dynamic performance
In this article,in order to explore the influence of the anti-yaw damper's service degradation characteristics on the high-speed Electric Multiple Units(EMU)'s dynamic performance,efforts are made to test the anti-yaw damper's service degra-dation characteristics under different service conditions,and the changing law of the damper's performance during service is ex-plored.The high-speed EMU's dynamic model is set up in SIMPACK,and the influence on the high-speed EMU's dynamic per-formance is analyzed based on the measured degradation data.The results show that the static indicator diagrams of the anti-yaw dampers under different service conditions are basically the same.The damping force of the damper in service significantly de-grades by 17.85％,compared with that of a new damper.As for the dynamic characteristics,the anti-yaw damper's dynamic stiffness under the working condition of 1mm amplitude reduces by 22.06％,and its dynamic damping reduces by 23.71％.The anti-yaw damper's performance degradation has a significant impact on the vehicle's stability;the critical speed degrades by a-bout 12.33％to the maximum degree.With the prolonged period of service,both the vehicle's lateral stability and the curve safety index under the condition of large radius curve experience a decline,but the curve trafficability under the condition of small radius curve is slightly improved.
anti-yaw damperservice characteristicvehicle dynamicsperformance evolution law
NETL
NSTL
万方数据
