连续交点型局部不平顺对机车性能影响分析

通过MATLAB软件模拟交点型不平顺,作为机车模型的外部激扰输入,根据机车车辆动力学理论,以机车动力学指标为依据,运用SIMPACK多体动力学仿真软件,分析了轨道随机不平顺及具有连续波数的交点型不平顺对机车运行安全性及平稳性的影响。仿真结果表明,在轨道交点型不平顺幅值和波长一定的情况下,轨道交点型不平顺的波数越多,对机车运行安全性和平稳性的影响就越大,并且都大于仅有随机不平顺激扰的情况。机车速度为160 km/h,在轨道含有连续三波交点型不平顺情况下,轮重减载率为0.685,超过了评定标准的限值0.65,因此,必须对轨道交点型不平顺的波数加以控制,或严格限制车速。

Analysis of Continuous Intersection Type Local Irregularity on Locomotive Performance

Using MATLAB software to simulate intersection type irregularity as the locomotive model external excitation, using SIMPACK multi-body dynamics simulation software to analysis the influences of track irregularity and intersection type irregularity number on the locomotive safety and comfort on the basis of the locomotive vehicle dynamics index by the locomotive vehicle dynamics theory. The simulation results show that, when the intersection type irregularity amplitude and wave length is certain, the more intersection type irregularity wave number, the more impact on locomotive safety and comfortable, and are more than the single random irregularity. Locomotive speed is 160 kin/h, the track contains three consecutive wave intersection type irregularity conditions, reduction rate of wheel load is 0. 685more than the standard limit value of 0.65, therefore must be control to track the number of intersection type irregularity or strict speed limits.