| 轮对安装偏角对高速列车过转辙器的动力特性影响 |
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| 引用本文： | 陈嵘,王雪彤,陈嘉胤,丁晔,徐井芒.轮对安装偏角对高速列车过转辙器的动力特性影响[J].西南交通大学学报,2021,56(4):872-882. |
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| 作者姓名： | 陈嵘 王雪彤 陈嘉胤 丁晔 徐井芒 |
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| 基金项目： | 国家重点研发计划（2017YFB1201102） |
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| 摘 要： | 高速列车轮对因定位不准会导致不同程度的初始安装偏差，在通过道岔等薄弱环节时轮轨关系急剧恶化，影响行车安全. 为研究车辆在初始安装偏角状态下通过高速道岔的动力学性能，以18号道岔为研究对象建立了具有初始偏转角的车辆-道岔耦合动力学模型，对前轮对偏转、后轮对偏转、前/后轮对同向偏转、前/后轮对反向偏转4种工况进行仿真，结合理论推导与数值仿真分析了不同偏转角对车辆入岔姿态及直逆向过岔走行性能的影响. 研究结果表明:初始偏转角向尖轨侧偏转时会导致轮轨过渡位置提前，甚至造成轮缘接触；初始安装偏角对轮轨垂向力的影响主要与偏角形式及偏转角有关，且偏转角超过一定限度时，岔区固有不平顺会进一步加剧轮轨垂向冲击；轮轨横向力主要受主接触点方向与道岔区横向冲击方向的叠加控制；前/后轮对反向偏转情况下，轮轨接触关系恶化，当偏转角为?2.0～?3.0 mrad，脱轨系数超限，影响行车安全.
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| 关 键 词： | 高速道岔 初始安装偏角 动力学响应 数值仿真 |
| 收稿时间： | 2019-06-18 |
Influence of Wheelset Installation Deflection Angle on Dynamic Characteristics of High-Speed Vehicles Crossing Switch |
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| CHEN Rong,WANG Xuetong,CHEN Jiayin,DING Ye,XU Jingmang.Influence of Wheelset Installation Deflection Angle on Dynamic Characteristics of High-Speed Vehicles Crossing Switch[J].Journal of Southwest Jiaotong University,2021,56(4):872-882. |
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| Authors: | CHEN Rong WANG Xuetong CHEN Jiayin DING Ye XU Jingmang |
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| Abstract: | The initial deflection angle of high-speed trains caused by inaccurate positioning sharply can aggravate wheel-rail contact relationships and affect traffic safety, especially when passing through weak areas such as turnouts. In order to study the dynamic performance of vehicles passing through high-speed turnouts at initial installation deflection angle, a vehicle-turnout coupling dynamic model with initial deflection angle was established with No.18 turnouts as the research object. Four working conditions, namely front wheel pair deflection, rear wheel pair deflection, front and rear wheel pair deflection in the same direction and front and rear wheel pair deflection in the opposite direction, were simulated. The effects of different deflection angles on the vehicle's fork entry posture and straight and reverse crossing performance were analyzed by combining theoretical derivation and numerical simulation. The results indicate that the initial deflection angle deflecting to switch rail will cause the advance of wheel-rail transition position, and even the rim contact will be caused. The influence of initial installation deflection angle on wheel-rail vertical force is mainly related to deflection form and deflection angle. When the deflection angle exceeds a certain limit, the inherent irregularity in turnout area further aggravates vertical wheel-rail impact. The wheel-rail transverse force is mainly controlled by the superposition of the main contact point direction and the transverse impact direction of the turnout area. When the front and rear wheelsets deflect reversely, the wheel-rail contact relationship deteriorates. When the deflection angle is from ?2.0 to ?3.0 mrad, the derailment coefficient exceeds the limit, which affects the driving safety. |
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