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针对滚动振动试验台垂向作动器的选型需要,建立了左右轨道轮独立垂向激振的简化力学模型,仿真得到正弦激振位移情况下的作用力;其次研究了普速线路轨道不平顺问题,仿真反演了典型速度下的垂向不平顺时间曲线,统计了对应的速度及加速度的标准差,并利用“3σ准则”给出作动器的运动参数。研究给出了滚动振动试验台垂向激振油缸的参数选择建议,可供机车车辆滚动振动试验台设计参考。
Aiming at the selection of vertical actuators for rolling vibration test rig, a simplified mechanical model of independent vertical vibration excitation of left and right rail wheels is established, and the force under sinusoidal excitation and displacement is simulated. Secondly, The problem of smoothness is simulated. The curve of vertical irregularity at typical speed is simulated and the corresponding standard deviation of velocity and acceleration are calculated. The motion parameters of the actuator are given by using the “3σ criterion”. The research gives the suggestion on the parameter selection of the vertical excitation cylinder of the rolling vibration test rig, which can be used as a reference for the design of the rolling vibration test rig of rolling stock.