| 基于侧向稳定性的圆曲线路段设计指标研究 |
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| 引用本文： | 张航,储泽宇,吕能超,段和柱.基于侧向稳定性的圆曲线路段设计指标研究[J].交通信息与安全,2021,39(2):28-35. |
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| 作者姓名： | 张航 储泽宇 吕能超 段和柱 |
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| 作者单位： | 1.武汉理工大学交通学院 武汉 430063 |
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| 基金项目： | 国家自然科学基金项目52072290 |
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| 摘 要： | 车辆在附着系数较小的圆曲线路段转向时，轮胎会处于非线性区内工作，此时基于线性理论的侧向稳定性分析方法会产生较大误差。建立6自由度非线性车辆系统模型，分析其处于非线性域与线性域下不同的特性状态，得到不同车速、路面附着系数下使车辆系统处于临界状态的圆曲线路段半径、超高设计指标。对线性域与非线性域内的车辆系统分别采用基于线性理论的根轨迹法与基于非线性理论的相平面法分析侧向稳定性，得到综合考虑2种状态下车辆临界失稳状态的圆曲线路段指标。结果表明，车速为60 km/h，路面附着系数为0.24，超高小于6% 时，车辆发生侧向失稳时轮胎处于非线性域，此时使用相平面法分析得到侧向失稳临界指标；车速为60 km/h，路面附着系数为大于0.4，超高处于4%到10%之间时，车辆发生侧向失稳时轮胎处于线性域，此时使用根轨迹法分析得到侧向失稳临界指标。
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| 关 键 词： | 交通安全 圆曲线路段 侧向稳定性 相平面法 根轨迹法 仿真 |
| 收稿时间： | 2020-11-24 |
Design Indices of Circular Curve Section Based on Lateral Stability |
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| ZHANG Hang,CHU Zeyu,LYU Nengchao,DUAN Hezhu.Design Indices of Circular Curve Section Based on Lateral Stability[J].Journal of Transport Information and Safety,2021,39(2):28-35. |
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| Authors: | ZHANG Hang CHU Zeyu LYU Nengchao DUAN Hezhu |
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| Affiliation: | 1.School of Transportation, Wuhan University of Technology, Wuhan 430063, China2.Intelligent Transportation Systems Reasarch Center, Wuhan University of Technology, Wuhan 430063, China |
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| Abstract: | When a vehicle turns in a circular curve section with a small adhesion coefficient, its tires work in a nonlinear zone, and the lateral stability analysis method based on the linear theory would generate large errors. This paper focuses on the different characteristics of the 6-DOF nonlinear vehicle system model in nonlinear and linear domains. Under different speed and road adhesion coefficients, the radius and superelevation design indices of the circular curve section with the critical state of the vehicle system are calculated. The root locus method based on the linear theory and the phase plane method based on the nonlinear theory are used to analyze the lateral stability of vehicle systems in linear and nonlinear domains, respectively. Then, a sectional index of the circular curve considering the critical instability state of vehicles in both states is obtained. The results show that when the vehicle speed is 60 km/h, with the road adhesion coefficient of 0.24, and the superelevation less than 6%. The tires are in the nonlinear domain when the vehicle lateral instability occurs. Besides, a critical index of lateral instability is obtained using the phase plane method. When the vehicle speed is 60 km/h, the road adhesion coefficient is greater than 0.4, and the superelevation is between 4 and 10%. The tires are in the linear domain when the vehicle lateral instability occurs, and the root system is used. Then a critical index of lateral instability is obtained by trajectory analysis. |
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