样条函数平曲线超高的研究

Study on Superelevation of Plane Curve of Spline Function

与传统公路平面线形相比，采用改进后的样条曲线具有设计合理，与汽车行驶轨迹一致，并能适应地形和车速的变化等特点。对样条函数平曲线的超高，在曲率半径最小点采用全超高，两则用曲线长比率为参数的三次多项式过渡。

Compared with traditional highway plane geometry, the improved spline curve has charaetertics of reasonable design, conformity with the traval trace on curve and adaption to the topographty and speed variation. For superelevation on plane curve of spline function, the maximum superelevation value at the minimum curvature and the cubic multionmial of curve length ratio parameter at sides are adopted. The design theory of plane curve of spline function is more perfected.