高速公路弯道路段载重汽车侧滑仿真及安全行车速度

发布时间：2018-06-06 10:20

本文选题：道路工程 + 高速公路弯道　；参考：《长安大学学报(自然科学版)》2017年06期

【摘要】：为了揭示高速公路载重汽车侧滑事故发生机理,分析侧滑时驾驶输入-道路-车辆的响应状态,寻找弯道路段载重汽车侧滑安全临界。针对侧滑事故研究受到真实试验无法开展的制约,采用ADAMS仿真软件,依据高速公路弯道路段载重汽车平衡条件,建立考虑刚柔耦合效应的载重汽车整车模型。分别采用3D样条路面和闭环控制方式建立非实测弯道路面模型和驾驶人模型,构建侧滑事故发生时驾驶人-道路-车辆瞬态动力学响应模型,并采用转向盘转角阶跃输入下的转向瞬态响应来评价载重汽车的操纵稳定性,实现仿真模型的可行性验证。参照实际采用参数值,对比设置道路条件、车辆条件、制动减速度、非实测路段特征点等ADAMS侧滑仿真工况。按照等差异划分,开展包含400、500、600、700、800、1 000、1 500、2 500 m共8种弯道半径,2%、3%、4%、5%、6%、7%、8%、10%共8种超高,0.2、0.4、0.6共3种路面附着系数的多组正交侧滑仿真试验,揭示载重汽车以不同速度在不同半径、不同附着系数的弯道路段下的侧滑轨迹变化规律,结合行车轨迹侧向偏移分析弯道特征点处的临界侧滑安全行车速度。结果表明:不同试验条件下高速公路弯道路段载重汽车轨迹侧向偏移量差异明显,最大可达2.456m,最小为0.053m,不同半径、不同附着系数下的弯道路段载重汽车瞬时转向临界侧滑安全行车速度阈值区间为47~97km/h。
[Abstract]:In order to reveal the mechanism of motorway truck side slip accident, analyze the response state of driving input road vehicle in sideslip and find the safety critical of the side slip of the truck on the bend road. In view of the restriction of the real test that can not be carried out in the study of the side slip accident, the ADAMS simulation software is used, according to the heavy truck on the highway curve section. On the balance condition, a vehicle model with rigid and flexible coupling effect is established. The 3D spline pavement and the closed loop control method are used to establish the non measured curve pavement model and the driver model respectively. The transient dynamic response model of the driver road vehicle at the time of the sideslip accident is constructed, and the Steering transient of the steering wheel angle step is adopted. The state response is used to evaluate the maneuverability and stability of the truck, and to verify the feasibility of the simulation model. According to the actual use of parameter values, the ADAMS sideslip simulation conditions such as road conditions, vehicle conditions, braking deceleration, and non measured section feature points are compared. According to the difference, 8 kinds of ADAMS 500,2 500 m are carried out. The bend radius, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 10%, 8 super high, 0.2,0.4,0.6 total 3 pavement adhesion coefficients are simulated by multi group orthogonal sideslip, which reveals the changing law of the sideslip trajectory of the truck at different speeds at different radius and different adhesion coefficient, and analyzes the critical point at the characteristic point of the curve combined with the lateral migration of the track. The result shows that the lateral deviation of the vehicle trajectory is obviously different under different test conditions, the maximum can reach 2.456m, the minimum is 0.053m, the different radius and the different adhesion coefficient, the threshold interval of the safe driving speed of the instantaneous steering critical side slip of the truck with different adhesion coefficients is 47~97km/h.
【作者单位】：长安大学公路学院;浙江省交通投资集团有限公司;陕西省交通规划设计研究院;
【基金】：国家重点研发计划项目(2016YFC0802208) 陕西省自然科学基础研究计划项目(2017JQ5122)
【分类号】：U467.13;U492.84

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