摘要
为了研究路面平整度对车辆侧滑和侧翻临界风速的影响，建立了二自由度车辆振动模型，依据路面平整度指标和路面功率谱密度之间的关系，利用傅里叶变换推导了基于公路工程技术标准的动荷载系数计算公式，在此基础上根据车辆运动模型推导了车辆侧滑和侧翻的临界风速计算公式，利用MATLAB编制了计算程序，以典型货车为例计算了考虑路面平整度影响和不考虑路面平整度影响的车辆侧滑、侧翻临界风速。研究结果表明：路面摩擦系数，车辆速度和路面平整度对车辆侧滑临界风速都有一定的影响；考虑路面平整度影响时，典型货车临界侧滑和侧翻风速都会相应降低．降低幅度为1-2m／s。
In order to research the influence of pavement roughness on vehicle sideslip and rollover critical crosswind velocity, 2 - DOF vehicle vibration model is built, according to the relationship between pavement roughness and pavement power spectral density, the dynamic load coefficient formula based on highway engineering technique standard is derived using Fourier transform. On this basis, the calculation formulas of vehicle sideslip and rollover critical crosswind velocity are derived according to vehicle running model. The computing procedure is programmed by MATLAB, the threshold crosswind velocities of vehicle sideslip and rollover for a typical truck considering and omitting pavement roughness are calculated. The result shows that （ 1 ） pavement friction coefficient, vehicle running speed and pavement roughness have certain influence on the vehicle critical crosswind velocity; （2） when considering the influence of pavement roughness, the sideslip and rollover critical crosswind velocity of typical vehicle will decrease about 1 -2 m/s.
出处
《公路交通科技》
CAS
CSCD
北大核心
2015年第2期134-139,共6页
Journal of Highway and Transportation Research and Development
基金
交通运输部应用基础项目(2014319817250)
山东省优秀中青年科学家科研奖励基金项目(BS2013SF007)
关键词
交通工程
行车安全
车辆振动模型
路面平整度
临界风速
侧滑
侧翻
traffil engineering
traffic safety
vehicle vibration model
pavement roughness
critical windvelocity
sideslip
rollover
作者简介
胡朋（1976-），男，山东沂南人，副教授，博士．（eimhp@163．com）
