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应用动态时程分析理论和有限元方法,建立六自由度轻轨半车车辆垂向动力分析模型,研究梁端位移包括梁端转角和错台引起线路垂向不平顺情况下,对轻轨车辆运行舒适度及安全性的影响。研究结果表明,梁端发生正的转角和负的转角只影响车辆垂向动力响应的方向,对幅值影响很小。随着桥梁转角的增大,车体的垂向位移、速度和加速度变化幅度均增大,基本呈线性关系。车辆从桥梁有转角一侧驶入无转角一侧,比从无转角一侧驶入有转角一侧的动力响应强烈,但转角达到4.2‰时,车体最大垂向加速度为0.094 g,可认为对车辆乘坐舒适性无影响,在实际发生的更小转角情况下,可忽略其对车辆运行平稳性的影响。随着错台高度的增加,车体垂向位移、速度和加速度值变大,但量值较小,对行车舒适性无影响。
By using the theory of dynamic time-history analysis and finite element method, the vertical dynamic analysis model of six degrees of freedom light rail semi-vehicles is established. The research on the displacement of the beam end including the corner of the beam and the vertical dislocation of the line causes the comfort of the light rail vehicle Degree and security impact. The results show that the positive and negative turning angles of the beam ends only affect the direction of vertical dynamic response of the vehicle, and have little effect on the amplitude. With the increase of the bridge angle, the vertical displacement, velocity and acceleration of the car body all increase in a linear way. When the vehicle reaches 4.2 ‰, the maximum vertical acceleration of the vehicle body is 0.094 g, which can be considered as It has no influence on the ride comfort of the vehicle. In the case of a smaller corner actually occurring, the influence on the ride comfort of the vehicle can be neglected. With the increase of the height of the wrong platform, the vertical displacement, speed and acceleration of the car body become larger, but the value is smaller, which has no influence on driving comfort.