吉林大学学报(工学版) ›› 2023, Vol. 53 ›› Issue (8): 2312-2320.doi: 10.13229/j.cnki.jdxbgxb.20220183

• 交通运输工程·土木工程 • 上一篇    

强侧风作用下桥隧连接段行车仿真与安全性分析

惠冰1,2(),刘伟1,周宇坤1,李淑琪1   

  1. 1.长安大学 公路学院,西安 710064
    2.特殊地区公路工程教育部重点实验室,西安 710075
  • 收稿日期:2022-02-28 出版日期:2023-08-01 发布日期:2023-08-21
  • 作者简介:惠冰(1982-),男,副教授,博士. 研究方向:路面检测与养护管理.E-mail:82628532@qq.com
  • 基金资助:
    国家重点研发计划项目(2021YFB2601000);国家自然科学基金面上项目(52178409);内蒙古自治区交通运输科技项目(NJ-2021-17)

Simulation on driving safety of bridge /tunnel connecting section of expressway under strong crosswind

Bing HUI1,2(),Wei LIU1,Yu-kun ZHOU1,Shu-qi LI1   

  1. 1.School of Highway,Chang'an University,Xi'an 710064,China
    2.Key Laboratory of Highway Engineering in Special Areas,Ministry of Education,Xi'an 710075,China
  • Received:2022-02-28 Online:2023-08-01 Published:2023-08-21

摘要:

为掌握强侧风对桥隧连接段小型车辆行驶安全性影响,应用CARSIM进行车辆动力学仿真,对风-车-路耦合仿真模型参数进行标定;通过对车型、车速、风速、风向角的不同组合共120种仿真工况的分析,得出了各种工况下车辆侧偏距离与反应时间的关系;利用正交实验和方差分析找出了汽车横向稳定性的显著影响因素。研究表明:影响汽车行驶稳定性因素由大到小依次为风向角、车速、车型、风级;车身截面迎风面积越大、车宽越宽,侧风作用越明显,在120 km/h车速、9级风、90°风向角开环情况下,轿车安全反应时间仅为2.7 s,SUV安全反应时间仅为2.3 s。研究结果可为侧风区高速行驶自动驾驶车辆的安全性评估和控制策略设计提供参考。

关键词: 汽车动力学, 空气动力学, CARSIM仿真, 行车安全评估模型, 山区强侧风, 桥隧连接段

Abstract:

In order to grasp the impact of strong crosswind on the driving safety of vehicles in the bridge-tunnel connection section, CARSIM is applied to simulate the vehicle dynamics and calibrate the parameters of wind-vehicle-road coupling simulation model. Through the analysis of different combinations of model, vehicle speed, wind speed and wind angle for a total of 120 simulation conditions, the relationship between vehicle lateral deviation distance and reaction time under various conditions is derived. Orthogonal experiments and ANOVA are used to find out The significant factors influencing the lateral stability of the vehicle were identified using orthogonal experiments and ANOVA. The test results show that the factors affecting the driving stability of the car are wind angle, vehicle speed, vehicle type and wind level in descending order; the larger the windward area of the body section and the wider the width of the car, the more obvious the effect of the side wind, and the safety reaction time is only 2.7 s for cars and 2.3 s for SUV under 120 km/h speed, 9-level wind and 90° wind angle open loop. The results of the study provide a reference for the safety evaluation and control strategy design of self-driving vehicles in the side wind area.

Key words: vehicle dynamics, aerodynamics, CARSIM simulation, traffic safety assessment model, strong crosswind in mountainous area, bridge/tunnel connection section

中图分类号: 

  • U495

表1

整车技术模型参数"

参数轿车SUV
车长/mm45014653
车宽/mm17041886
车高/mm14691730
轴距/mm26042688
前轮距/mm15401585
质心高度/mm520670
簧上质量/kg11401541
迎风面积/m256.6

图1

气动参考点概念图"

图2

侧偏危险界限示意图"

图3

侧偏安全距离示意图"

图4

风向角对车辆侧偏安全的影响"

图5

各工况不同风速的强侧风作用下车辆的偏移轨迹"

图6

车速对车辆侧偏安全的影响"

图7

侧风与车速耦合作用下的安全反应时间"

表2

正交试验表"

水平车型车速 /(km·h-1风级风速 /(m·s-1风向角 /(°)
1轿车80613.630
2SUV100716.960
3120820.590
4923.3120
5150

表3

主体间效应检验"

来源Ⅲ类平方和自由度均方F统计量显著性
总计6411.474360
修正模型558.0741246.506404.6890.000
车型21.695121.695188.7850.000
车速114.640257.320498.7910.000
风级61.877320.626179.4810.000
风向角359.770489.942782.6650.000
误差39.8773470.115
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