| 曲线轨道上重载货车悬挂相对位移的仿真计算方法及应用 |
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| 引用本文： | 杨春雷,王开云.曲线轨道上重载货车悬挂相对位移的仿真计算方法及应用[J].西南交通大学学报,2022,57(5):1008-1016. |
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| 作者姓名： | 杨春雷 王开云 |
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| 作者单位： | 1.湖北民族大学智能科学与工程学院，湖北 恩施 4450002.西南交通大学牵引动力国家重点实验室，四川 成都 610031 |
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| 基金项目： | 国家自然科学基金( 51965016) |
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| 摘 要： | 为准确求解曲线轨道上重载货车悬挂的相对位移，首先，建立曲线轨道数学模型，推导出曲线外轨超高、顺坡角、侧滚角和中心角随线路长度的变化公式，再根据车辆各刚体部件进出曲线的时间和所处曲线位置差异，编程计算悬挂点刚体间的超高及转角差；其次，以刚体质心为坐标原点建立本体坐标系，分别给出悬挂点在两刚体本体坐标系中的坐标表达式，通过坐标变换法将本体坐标转换到同一坐标系下，计算悬挂点瞬态相对位移；最后，结合车辆曲线动力学仿真程序计算，即可求出车辆曲线通过时各悬挂点的动态相对位移. 计算结果表明:车辆悬挂相对位移是车辆参数和曲线轨道参数综合作用的结果，当单独不计线路侧滚角差、顺坡角差、中心角差时，对应悬挂相对位移的最大偏差率可达42.85%、24.03%、71.42%；利用坐标变换结合动力学仿真计算的方法可全面考虑车辆和轨道参数，求解车辆悬挂相对位移更为准确.
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| 关 键 词： | 车辆工程 重载货车 车辆悬挂 相对位移 曲线轨道 仿真计算方法 坐标变换 |
| 收稿时间： | 2021-03-02 |
Simulation Calculation Method and Application for Relative Displacement of Heavy Hall Freight Suspension on Curved Track |
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| YANG Chunlei,WANG Kaiyun.Simulation Calculation Method and Application for Relative Displacement of Heavy Hall Freight Suspension on Curved Track[J].Journal of Southwest Jiaotong University,2022,57(5):1008-1016. |
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| Authors: | YANG Chunlei WANG Kaiyun |
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| Affiliation: | 1.School of Intelligence Science and Engineering, Hubei Minzu University, Enshi 445000, China2.Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, China |
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| Abstract: | In order to accurately solve the relative displacements of heavy haul freight suspension on a curved track, firstly the mathematical model of curved track was established, and the formulas of outer rail superelevation, slope angle, roll angle and central angle with the length of curve were derived, then according to the time difference and the geometric position difference between the suspension components while the vehicle entering or leaving the curved track, programming to calculate the relative rail superelevation and angle difference of these rigid components. Secondly, the ontological coordinate system was established with the centroid of each rigid body as the origin, and the coordinate expressions of suspension points in the two ontology coordinate systems were given respectively, and converting these coordinates into a same coordinate system through coordinate transformation method, so the transient relative displacement of suspension points could be calculated. Finally, by combining the vehicle curving dynamics simulation, the dynamic relative displacements of suspension points could be calculated. The results indicate that the relative displacement of vehicle suspension is the result of the comprehensive action of vehicle parameters and curve track parameters, when the difference of roll angle difference, slope angle and central angle are excluded separately, the corresponding maximum deviation rate of relative suspension displacement can arrive at 42.85%, 24.03%, and 71.42%. The method of coordinate transformation combined with dynamic simulation can fully consider the vehicle and track parameters, and the relative displacement of vehicle suspension can be solved more accurately. |
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