低地板有轨电车防折弯系统及动力学仿真

Anti-kink System and Dynamics Simulation of Low Floor Tram

针对低地板有轨电车及引进的防折弯液压系统,分析防折弯系统中相关重要参数对液压系统防折弯功能和二系减振功能的影响。提出防折弯液压系统与低地板有轨电车动力学模型联合仿真的方法,研究防折弯液压系统对低地板有轨电车通过曲线性能的影响。液压系统参数研究表明,主阀块旁通节流孔直径和缓冲油缸弹簧刚度主要影响液压系统的防折弯功能,缓冲阀块阻尼孔直径和限压阀开启压力主要影响液压系统的二系减振功能。联合仿真结果显示,防折弯系统能够很好地保持有轨电车前后车体与转向架之间相对回转的一致性,抑制车体过大的横向位移和前后车体间的相对位移。建立的抗折弯液压系统-列车动力学联合仿真模型,可用于研究抗折弯液压系统对低地板有轨电车通过曲线时列车各项性能的影响。

Based on the low floor tram and the anti-kink hydraulic system introduced, the impact of important parameters in the anti-kink system on the anti-kink function and secondary damping functions of the hydraulic system is analyzed. A method of co-simulation of anti-kink hydraulic system and low-floor tram dynamic model is proposed, and the influence of anti-kink hydraulic system on the curve performance of low-floor trams is studied. The results show that the diameter of bypass orifice of main valve block and the spring stiffness of buffer cylinder mainly affect the anti-kink function of hydraulic system. The diameter of damping orifice of orifice block and the opening pressure of pressure-limiting valve mainly affect the damping function of hydraulic system. The co-simulation results show that the anti-kink system can well maintain the relative kink between vehicles, and inhibit the excessive lateral displacement and the relative displacement between the front and rear bodies. The co-simulation of anti-kink hydraulic system and tram dynamics model can be used to study the impact of the anti-kink hydraulic system on the performance of the train when the low-floor tram passes the curves.