| 一种新型道路缓和曲线的线形分析与评价 |
| Analysis and Evaluation of a New Road Transition Curve |
| 投稿时间：2009-11-23 |
| 中文关键词:道路工程 新型缓和曲线 边界条件 横向加速度时变率 横向加速度 行驶动力学 |
| 英文关键词:road engineering new transition curve boundary conditions lateral change of acceleration lateral acceleration vehicle movement dynamics |
| 基金项目:国家自然科学基金项目(50878134);河北省自然科学基金项目(E2006000394) |
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| 中文摘要: |
| 缓和曲线作为一种空间过渡曲线，其设计的合理与否直接关系到车辆行驶的平稳性和旅客舒适性。介绍了利用缓和曲线边界条件确定其代数方程式的一种通用方法：根据边界条件列出曲率待定方程,并利用曲率边界条件确定出缓和曲线曲率方程，然后对曲率方程二次积分得到缓和曲线的方程。此方法适用于推导缓和曲线方程，可为公路缓和曲线线形设计提供参考。采用此方法设计出了一种连接直线与直线的新型缓和曲线，并建立5种不同工况，以横向加速度及其时变率为评价指标，对新型缓和曲线和回旋线进行了行驶动力学性能评价，通过比较分析得出这种新型缓和曲线在行驶动力学性能上明显优于回旋线，为高速公路缓和曲线的线形选择提供参考。 |
| 英文摘要: |
| Whether the type of transition curve is set up rationally or not affects directly the car running stability and comfort of passengers. A general and new method for determining its algebraic equations by the aid of boundary conditions of transition curve is presented: firstly, according to the given boundary conditions of transition curve the equation of curvature with unknown coefficients is formulated, the unknown coefficients in the curvature equation are determined by the boundary conditions of curvature, and the curvature equation is obtained. Then the equation of transition curve in Cartesian coordinates can be obtained by double integration of curvature equation. It is a general method that can be applied for determination of algebraic equations and type of highway transition curve. Using this method, a new transition curve (NTC) connecting line to line is obtained. Lateral [JP3]acceleration (LA) and lateral change of acceleration (LCA) are taken into account to compare the vehicle movement dynamics of NTC and spiral curve in five different motion models. Examination for LA and LCA shows that NTC is superior to spiral curve in vehicle movement dynamics. It offers a new choice for the type of highway transition curve.[ |
| 李木松,李向国,商敏.一种新型道路缓和曲线的线形分析与评价[J].石家庄铁道大学学报(自然科学版),2010,(3):14-18. |
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