基于直接积分法的弓网耦合系统动态性能仿真分析

针对提速铁路采用的弹性链型悬挂接触网及受电弓结构,建立包含承力索、辅助线、接触线和吊弦4个部件的接触网模型、以及简化为弹簧阻尼机构的受电弓模型。通过接触单元将接触网和受电弓直接耦合起来得到弓网系统的整体模型,进而构建弓网耦合系统的动力学平衡方程。采用直接积分法对建立的平衡方程进行求解,得到反映弓网系统动态性能的抬升位移、接触压力以及应力等数据。与先前研究的参考数据比对结果表明,采用接触单元和直接积分法分析弓网耦合系统的动态性能,切实可行。

Dynamical Performance Simulation of the Pantograph-Catenary Coupled System Based on Direct Integration Method

According to the structures and the dynamic performance of the stitched catenary and the pantograph adopted for the speed-increased railway the model of the catenary including support wire,dropper,contact wire and assistant wire is established with the finite element method,and the pantograph is also simplified as a multi-body system with mass,stiffness and damping.Furthermore,based on the contact element,the coupled motion equation of the pantograph-catenary system is derived.With direct integration method,the coupled motion equation is solved and the lifted displacement,contact force and dynamic stress are obtained.Subsequently a comparison with the previous research data has been performed,the results show that the calculation method based on the contact element and direct integration method can be directly used for the dynamic behavior analysis of the pantograph-catenary coupled system.