摘要
运用车辆-轨道耦合动力学理论,建立三大件式转向架货车与轨道结构耦合动力学模型,详细考虑货车系统非线性特性,包括轮轨接触非线性、轴箱间隙非线性、楔块干摩擦非线性及转向架抗菱刚度非线性等。以我国广泛运用的转8A转向架货车为例,从理论上分析货车的横向非线性运动稳定性。结果表明,空车蛇行失稳临界速度仅为78 km/h。实车运行试验的结果表明,当该型货车空车以75 km/h速度在直线轨道上运行时,车体表现出剧烈的横向蛇行运动现象,蛇行运动主频为2.69 Hz,蛇行波长为7.745 m。
Based on the theory of vehicle-track coupled dynamics, a dynamic model for the three-piece-bogie wagon and track structure system is established. The major nonlinearities containing in the wagon system, such as the wheel/rail contact, the axle-box clearance, the wedge Coulomb friction, and the rhombus distortion of bogie frame, are considered in the model. Taking the Chinese main type wagon with Z8A three-piece-bogie as an example, the nonlinear lateral running stability of the wagon is analyzed theoretically. It is shown that the critical hunting stability speed is only 78 km/h in the case of unloaded wagon. A field running experiment is carried out and the results shows that strong hunting motion occurs when an empty wagon with the Z8A type bogie runs on a straight track with the speed of 75 km/h. The predominant frequency of the hunting motion of the car body is 2.69 Hz, and the wavelength of the hunting motion is 7.745 m.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2008年第11期138-144,共7页
Journal of Mechanical Engineering
基金
国家自然科学基金(50475111
50521503)
国家重点基础研究发展计划(973计划
2007CB714706)资助项目。
