动力稳定装置-轨道系统横向动力学响应分析

针对不同道床工况下轨道动力稳定车作业时轨枕的动力学响应的规律和最优作业参数选择的问题,文中建立了动力稳定装置-轨道系统横向动力学模型。利用MATLAB软件结合数值积分法对动力学模型进行了仿真求解,得到了不同道床工况下的轨道动力稳定车作业时轨枕动力学响应规律和动力稳定装置最优激振频率。结果表明,在同一激振频率范围内,随着道床横向刚度和阻尼的增大,轨枕横向动力学响应均值逐渐变小。文中的道床工况得到最优激振频率为31~33 Hz。

Analysis of Lateral Dynamic Response for Dynamic Stabilize unit-Track System

The dynamic response discipline of the sleeper and the selection of the optimal operating parameters were studied for the track dynamic stabilizer under different track conditions. A lateral dynamics model of the dynamic stabilize unit-track system was established. The dynamic model was simulated by MATLAB software combined with numerical integration method. The dynamic response law of the sleeper and the optimal excitation frequency of the dynamic stabilize unit were obtained when the track dynamic stabilizer was under different track conditions. The research results showed that in the same excitation frequency range, with the increase of lateral stiffness and damping of the ballast bed, the average lateral dynamic response of the sleeper became smaller. Meanwhile, the optimal excitation frequency was 31~33 Hz for the track bed conditions studied in this paper.