悬挂式单轨车辆曲线通过性仿真研究

Simulation research on curve-passing performance of the suspended monorail vehicle

针对悬挂式单轨车辆曲线运行平稳性和舒适性容易受到线路设计因素影响的特点,采用虚拟样机仿真平台对其曲线通过性进行了研究。首先,较系统的分析了悬挂式单轨车辆的结构及其特点;在此基础上建立了模拟悬挂式单轨车辆橡胶轮胎的轮胎模型;然后,参照悬挂式单轨车辆单节完整的拓扑图建立动力学仿真模型;最后,进行了典型工况下的悬挂式单轨车辆的仿真分析。结果显示,在曲线通过安全限速内,导向轮受力随着车辆速度的增加几乎呈线型增长;而随着曲线轨道距离的增大导向轮径向受力基本保持不变。不同曲线半径工况下,曲线通过平稳性预测结果:垂向平稳性指标最大值为2.24,横向平稳性指标最大值为2.15,二者数值均在我国国家标准《铁道车辆动力学性能评定和实验鉴定规范》(GB/T 5599-1985)规定的平稳性等级2.5以内;垂向最大加速度为0.64 m/s2,横向最大加速度为0.45 m/s2,轮重减载率最大值为0.56,均符合国际联盟颁布的《铁路运输国际标准》(UIC 505)规定。表明利用虚拟样机技术仿真平台建立的单轨车辆模型能够较好的应用于车辆的曲线通过性的评价,并能进一步应用于后续运行特性研究当中。

Aimed at its unique operation characteristics,the stability and comfort of suspension type monorail transportation system are more susceptible to the circuit design. Based on the virtual proto-type simulation platform, the curve-passing performance is studied. First of all, the structure and characteristics of the suspension monorail vehicle are systematically analyzed and simulation suspen-ded monorail vehicle rubber tyre model is established. Then, single-section complete topology on suspension monorail vehicle dynamics simulation model is set up. Finally, simulation analysis of typical working conditions of suspension monorail vehicle is carried out. The simulation results show that within the speed limit curve through security, guide wheel force is almost linear growth with the increase of vehicle speed; but guide wheel force remains unchanged with the increase of distance curve track basic. Under different curve radius, the maximum index of vertical stability is 2. 24, the maximum index of transverse stability is 2. 15 , both are in our national standard Appraisal Norms of Railway Vehicle Dynamics Performance Evaluation and Experimental （ GB/T 5599-1985 ） regula-tion within the stationarity of grade 2. 5; Vertical maximum acceleration is 0. 64 m/s^2 , horizontal maximum acceleration is 0. 45 m/s^2 , the maximum of rate of wheel load reduction is 0. 56, conform to the International Union of the International Standard of Railway Transportation （ UIC 505 ） regula-tions ;It showed that using the simulation platform of virtual prototype technology, the suspended monorail vehicle model can be better applied in the assessment of vehicle curve negotiation perform-ance, and can be further applied to subsequent research of running characteristics.