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后轮对独立回转新型无摇枕转向架的曲线导向性能主要取决于其前轴的一系纵向定位刚度,而后轴的一系纵向定位刚度对导向性影响较小。因此,为了同时保证其曲线导向性和直线稳定性,对转向架一系纵向刚度可采取前后轴非对称布置。建立具有14个自由度的非线性车辆模型和车辆通过曲线轨道时的运动方程,采用MATLAB语言编写计算程序,对4种非对称布置方案的转向架曲线导向性能进行仿真对比分析。仿真分析结果表明,当刚度以车辆中心对称布置时,若外侧轮对纵向刚度小,内侧轮对纵向刚度大,则前转向架性能基本保持不变,而后转向架曲线通过性能变差,但其摇头角比前后刚度较大的方案要好;当第一、第三轮对的纵向刚度较小和第二、第四轮对的刚度较大时,转向架曲线通过性能好,且又改善了其在直线上的横向稳定性,是较适合高速运行的转向架布置方案。
The curvilinear guidance performance of the rear wheel pair independent slewing new bolsterless bogie mainly depends on the longitudinal positioning stiffness of the front axle, while the longitudinal positioning rigidity of the rear axle has less influence on the steering performance. Therefore, in order to ensure both the curve guidance and the linear stability, a series of longitudinal stiffness of the bogie can be arranged asymmetrically in front and rear axles. The nonlinear vehicle model with 14 degrees of freedom and the equations of motion of the vehicle passing through the curved orbit are established. The programming program is written in MATLAB language to simulate and contrast the bogie curve guidance performance of the four asymmetric arrangement schemes. The simulation results show that when the stiffness is symmetrically arranged at the center of the vehicle, if the longitudinal rigidity of the outer wheel pair is small and the longitudinal rigidity of the inner wheel wheel is large, the front bogie performance remains basically unchanged and the curve passing performance of the rear bogie deteriorates. However, When the longitudinal stiffness of the first and third wheel pairs is smaller and the stiffness of the second and fourth wheel pairs are larger, the bogie curve has better performance and improves its rigidity The horizontal stability in the straight line is more suitable for high-speed operation of the bogie layout.