中南大学学报（自然科学版）2017，Vol.48Issue(8)：2142-2151,10.DOI:10.11817/j.issn.1672-7207.2017.08.023
基于轮轨时变接触刚度的车辆-轨道系统垂向振动分析
Vehicle-track system vertical vibration analysis based on wheel-rail time-varying contact stiffness
摘要
Abstract
A vertical and unified equation of the vehicle-track system was established with finite element theory and energy variation method,and wheel-rail time-varying contact stiffness replaced wheel-track nonlinear contact force on dynamic effects to simulate the natural contact between wheel and rail.The validity of the model was verified by inputting the long and medium-wave irregularity of track and pulsed shortwave in this model and the dynamic response was calculated.The tight contact model between wheel and rail,which was popular in China was compared and analyzed.The results show that analyzing dynamic response of the vehicle-track system at the tight contact model for the long and medium-wave irregularity of track is feasible.However,the rigid method between wheel and track will amplify the incentive effect of shortwave for the shortwave irregularity of track,the treatment method about jumping rail should be improved.关键词
车辆-轨道耦合系统/时变接触刚度/垂向振动/能量变分法/统一方程Key words
vehicle-track coupling system/time-varying contact stiffness/vertical vibration/energy variation method/unified equation分类
交通工程引用本文复制引用
贺天龙,陈宪麦,徐磊..基于轮轨时变接触刚度的车辆-轨道系统垂向振动分析[J].中南大学学报（自然科学版）,2017,48(8):2142-2151,10.基金项目
国家自然科学基金资助项目(51478482) （51478482）
中国铁路总公司科技研究开发计划项目(Z2013-G006) （Z2013-G006）
武汉铁路局科技发展计划项目(13G04)(Project(51478482) supported by the National Natural Science Foundation of China （13G04）
Project(Z2013-G006) supported by the Science and Technology Research and Development of China Railway Corporation （Z2013-G006）
Project(13G04) supported by the Science and Technology Development Plan of Wuhan Railway Administration) （13G04）
