摘要
为了改善山区高速公路长大下坡的安全性能,用能量守恒理论建立了长大下坡货车制动器变速温度模型.通过野外试验和数理统计,对模型的部分参数进行了标定和修正.提出长大下坡临界坡度Ⅰ、Ⅱ的概念,提出我国长大下坡安全风险分级指标.结合运行速度和制动器温度对我国公路的长大下坡安全风险进行评价.结果表明:基于制动器温度的临界坡度是山区高速公路长大下坡缓和过渡段设计的控制坡度.货车主制动器升温模型作为一种有效快速的道路安全评价手段,可量化长大下坡安全风险等级,有助于避险车道位置选定和其他安全辅助措施的实施.
To improve the security of long and steep downgrade in mountain highway,we establish a temperature model of truck brake speed on long and steep downgrade with the theory of energy conservation.Some parameters of the model have been modified through field tests and mathematical statistics.The critical gradient Ⅰ and Ⅱ concept of long and steep downgrade is proposed,and the security risk rating index of long and steep downgrade is proposed.The results show that the critical gradient based on the brake temperature is the control gradient of the smooth transition section design in the long and steep downgrade section of freeway in mountain areas.Brake temperature model for truck owners is as an effective means of rapid assessment of road safety.It can quantify the security risk rating of long and steep downgrade,which is helpful for p the selection of hedge lane location and the implementation of other security support measures.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2010年第4期656-659,共4页
Journal of Harbin Institute of Technology
基金
国家科技支撑计划课题(2007BAK35B03)
关键词
长大下坡
变速温度模型
临界坡度
安全等级
long and steep downgrade
variable temperature model
critical gradient
security level
