既有线纵断面优化及自动绘图

Profile Optimization for Existing Line and Auto-Drawing

本文提出用轨面标高二阶差判断变坡点，用线性拟合原理优化坡度线的方法，在陇海线张茅至庙沟区间，经过初步试用效果良好．

This paper offeres a new method.It uses the track surface height's second derivative deffernce to distinguish the break point in grade and optimizes profile grade with linear fitting.This method has been tested on the line between Zhang Mao and Miao Gou station on Long Hat railway. The test result is very satisfactory.