中国铁道科学2013，Vol.34Issue(3)：66-71,6.DOI:10.3969/j.issn.1001-4632.2013.03.11
重载货车转向架非线性干摩擦力等效线性化及在车桥耦合中的应用
Equivalent Linearization of Nonlinear Dry Friction Force of Bogie in Heavy Haul Freight Car and Its Application in Vehicle-Bridge Coupling
摘要
Abstract
Equivalent linearization of nonlinear dry friction force was carried out for the bogie in heavy haul freight car using describing function approach based on the equality of average power in a period of vibration.Namely,the vertical and lateral nonlinear friction forces between wedge and bolster were equivalent to the vertical and lateral linear damping forces.The rotating frictional resistance moments of side bearing and center plate were linearly equivalent to rotating frictional damping forces,and then the equivalent linear dynamics model of heavy haul freight car was established.Taking C80 type heavy haul freight car for example,the dynamics simulation calculations of heavy haul freight car were executed by the given equivalent linear dynamics model and nonlinear dynamics model respectively.The results indicate that,although the equivalent linear dynamics model slightly increases the stability indexes of carbody in both vertical and lateral directions,wheel-rail lateral force,derailment coefficient and wheel load reduction rate,these parameters still are in the range of GB/T 5599-1985 standard,and satisfy the requirements of their own evaluation indexes.As a result,the correctness and rationality of describing function approach applied to the equivalent linearization of nonlinear dry friction force are verified.It illustrates that the equivalent linear dynamics model of heavy haul freight car based on describing function approach can substitute for the complicated nonlinear dynamics model to analyze the dynamic response of vehicle-bridge coupling when heavy haul freight car passes through the existing bridge.It provides a new effective way for the parameter optimization of nonlinear suspension system of heavy haul freight car as well as the dynamics performance analysis of vehicle-bridge coupling.关键词
重载货车/动力学模型/描述函数法/转向架/非线性干摩擦力/等效线性化/车桥耦合动力学Key words
Heavy haul freight car/ Dynamics model/ Describing function approach/ Bogie/ Nonlinear dry friction force/ Equivalent linearization/ Vehicle-bridge coupling dynamics分类
交通工程引用本文复制引用
张宝安,陆正刚,李奇..重载货车转向架非线性干摩擦力等效线性化及在车桥耦合中的应用[J].中国铁道科学,2013,34(3):66-71,6.基金项目
铁道部科技研究开发计划项目(2011J008) （2011J008）
