中国铁道科学2012，Vol.33Issue(6)：51-59,9.DOI:10.3969/j.issn.1001-4632.2012.06.09
基于投影轮廓的轮轨三维接触几何计算研究
Calculation and Research on Wheel-Rail 3D Contact Geometry Based on Projection Contour
摘要
Abstract
In order to facilitate the research on the geometrical relation of wheel-rail contact, the geometrical calculation of three types of typical wheel-rail 3D contact, including wheel-rail contact on straight line, wheel-rail contact on curve and wheel-rail roller contact, was converted into 2D contact of parallel projection contour for wheel-rail contact on straight line and rotating projection contour for wheel-rail curve and wheel-rail roller contact. Based on the characteristics of wheelset revolution solid, the calculation formula for the bottom contour of wheelset under different projection directions was respectively derived. The solving steps and 2D synchronous iterative procedure suitable for the calculation of wheel-rail 3D contact were presented. Taking the relationship between S1002CN tread wheelset and 3D contact geometry of 60 kg · m-1 rail for example, the wheel-rail 3D contact geometry on straight line, 300 m radius curve and the roller test rig with 900 m radius track wheel was simulated and analyzed. The results show that, by taking the deflection angle of wheel-rail contact point relative to wheelset bottom generatrix as the calculation parameter enables the calculation method of wheel-rail contact geometry based on the projection contour simple and easy to use. The geometrical relationship of wheel-rail 3D contact on straight line and the one on curve is similar, and can be approximated by wheel-rail 2D geometrical relationship when the yaw angle of wheelset is less than 5~10 mrad. When the wheelset has big lateral displacement, the deflection angle of contact point can be regarded as the linear function of wheelset yaw angle within a certain scope. 2D synchronous iteration can effectively realize the geometrical calculation of wheel-rail 3D contact under complicated conditions. There is obvious deflection angle in wheel-rail roller 3D contact even under small lateral displacement condition, which needs to be corrected in simulation.关键词
轮轨接触/投影轮廓/旋转体/二维同步迭代Key words
Rail-wheel contact/ Projection contour/ Revolution solid/ 2D synchronous iteration分类
交通工程引用本文复制引用
曾宇清,文彬,于卫东,成棣,王成国..基于投影轮廓的轮轨三维接触几何计算研究[J].中国铁道科学,2012,33(6):51-59,9.基金项目
中国铁道科学研究院行业服务技术创新项目(2011YJ27) （2011YJ27）
