摘要
研究车桥耦合系统中轮轨相互作用关系问题。以刚体动力学方法建立车辆子系统模型,有限元法建立桥梁子系统模型;假定车辆轮对与钢轨之间在竖向上服从轮轨密贴假定,在横向上服从Kalker蠕滑理论;并在计算横向蠕滑力时考虑轮对锥形踏面和恒定法向力;以轨道不平顺为系统激励;建立车辆-桥梁统一的线性动力平衡方程组。利用上述轮轨线性相互作用假定,以SS8单节机车通过单跨32m简支梁为例,计算各轮对横向运动的时域及频域响应;讨论轮对蛇形运动波长、波幅的影响因素;分析桥梁横向振动、横向轨道不平顺以及车辆系统横向振动三者的关系;并验证轮对蛇行波假定的正确性。
Wheel-track interaction in the vehicle-bridge coupling system is studied.The vehicle subsystem model is established by the rigid body dynamics method,the bridge subsystem model is established by the finite element method.It is assumed that the wheel-track interaction obeys the wheel-track corresponding assumption in the vertical direction and obeys the Kalker creep theory in the lateral direction and the cone profile and constant normal force are considered in calculation.The linear dynamic equilibrium equations for the vehicle-bridge system are modeled,in which track irregularities are taken as inspiration to the system.As a case of study,the dynamic responses of all wheelsets in both the time domain and frequency domain are calculated for the SS8 single-unit locomotive passing a 32m single-span simple-supported beam,the influential factors of hunting wavelengths and hunting amplitudes are discussed,and the relation of lateral vibration of the bridge,lateral track irregularities and lateral vibration of the vehicle is analyzed.Also the wheelset hunting assumption is verified.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2010年第2期66-71,共6页
Journal of the China Railway Society
基金
国家自然科学基金资助项目(50538010)
关键词
轮轨线性相互作用假定
轮轨密贴假定
Kalker蠕滑理论
车桥系统动力分析
轮对蛇行波
wheel-track interaction assumption
wheel-track corresponding assumption
Kalker creep theory
vehicle-bridge system dynamic analysis
wheel-set hunting
