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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。
A catenary model including four components of bearing cable, auxiliary line, contact line and hanging string is established for the suspension chain and pantograph structure of speed-up railway, and the pantograph model simplified as the spring damping mechanism . The contact network and the pantograph are directly coupled to obtain the overall model of the bow-net system through the contact unit, and then the dynamic equilibrium equation of the bow-net coupling system is constructed. The direct integral method was used to solve the equilibrium equation, and the data such as uplift displacement, contact pressure and stress, which can reflect the dynamic performance of arch system, were obtained. The results of comparison with the reference data of the previous study show that it is feasible to analyze the dynamic performance of arch-net coupling system by using contact elements and direct integral method.