摘要
基于车辆 -轨道耦合动力学理论 ,建立了车辆 -轨道垂横耦合模型 ,利用时域数值积分法在时域仿真得到耦合系统的横向随机振动响应 ,再用周期图法估计出车辆、轨道横向随机响应功率谱密度 ,利用谱分析详细研究了轨道高低、水平、方向和轨距不平顺对车辆、轨道横向随机振动的影响。结果表明 ,车辆及轮轨横向力表现为低频振动 ,主要受轨道方向和水平不平顺影响 ;钢轨和轨枕的横向振动频率分布很广 ,其低频段主要受轨道方向和水平不平顺影响 ,而高频段的振动主要由轨面垂向短波不平顺激发。
Based on the theory of vehicle/track coupling dynamic s, the vertical and lateral coupling mo-del of the vehicle-track system is set u p. The lateral random vibration responses are carried out in time field by th e numerical integration method, and the random responses of PSD of the vehicle a nd the track are achieved by period graph method. The influences of the trac k v ertical profile, cross-lever, alignment, and gage irregularities on lateral ran dom responses of vehicle and track are investigated by using spectra analysis t echn ique in detail. The results show that lateral forces of the vehicles and wheel/ rail present low frequency v ibration, and are mainly influenced by track alignment an d cross-level irregularities; the frequency range of rail and the Sleeper′s v ibration is vary wide, and their low frequency vibration is mainly influenced b y track alignment and cross-level irregularities, and almost excited by vertica l short wave irregularities existed on the surface of rail.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2001年第3期227-232,共6页
Journal of Nanjing University of Aeronautics & Astronautics
基金
高等学校博士学科点专项科研基金 (编号 :980 61 3 0 3 )资助项目
关键词
车辆
轨道
随机振动
耦合模型
轨道不平顺
横向振动
铁道
vehicles
track ways
random vibration
lateral responses
coupling model
track irregularities
