| 基于曲率变化率的运行速度模型 |
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| 引用本文： | 许金良,胡圣能,杨宏志.基于曲率变化率的运行速度模型[J].长安大学学报(自然科学版),2011(5):1-6. |
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| 作者姓名： | 许金良 胡圣能 杨宏志 |
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| 作者单位： | 长安大学特殊地区公路工程教育部重点实验室;华北水利水电学院土木与交通学院; |
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| 基金项目： | 陕西省交通科技项目(08-24k) |
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| 摘 要： | 针对目前运行速度预测模型误差较大、准确度不高以及普适性不强等问题,提出了曲率变化率的概念,并论述了单曲线曲率变化率与运行速度之间的关系;通过统计分析双车道二级公路大量观测的运行速度后,得到了不同曲率变化率值下的汽车运行速度的特征规律,利用SPSS软件进行回归分析,建立了曲率变化率K值与弯道内稳定运行速度V85的关系模型。模型经过检验和验证后表明:模型的准确性和精度满足要求,模型预测值与实际观测值拟合良好;利用曲率变化率预测运行速度简便、有效;该方法的提出能有效突破目前预测运行速度方法的局限。
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| 关 键 词： | 道路工程 平曲线 曲率变化率 运行速度 预测模型 |
Operating speed prediction models based on curvature changing rate |
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| XU Jin-liang,HU Sheng-neng,YANG Hong-zhi.Operating speed prediction models based on curvature changing rate[J].JOurnal of Chang’an University:Natural Science Edition,2011(5):1-6. |
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| Authors: | XU Jin-liang HU Sheng-neng YANG Hong-zhi |
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| Institution: | XU Jin-liang1,HU Sheng-neng1,2,YANG Hong-zhi1(1.Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang'an University,Xi'an 710064,Shaanxi,China,2.School of Civil Engineering and Communications,North China University of Water Conservancy and Electric Power,Zhengzhou 45001l,Henan,China) |
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| Abstract: | To solve some problems of operating speed prediction method,such as large error,low accuracy and less applicability,the concept of curvature changing rate of curve is put forward,the law between curvature changing rate of single circular curve and operating speed is studied by investigating a large number of curvature changing rate of curve and the massive measured data of operating speed on two-lane secondary highways,the operation ru1es of vehicles of horizontal curve section value are obtained under the ... |
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| Keywords: | road engineering horizontal curve curvature changing rate operating speed prediction model |
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