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中文摘要：
针对高速铁路动车组升降弓的拉弧现象,研究了计及风载荷下的升降弓电弧运动特性。首先结合链式电弧模型的特点,建立升降弓拉弧的物理模型;然后系统考虑开放式环境中升降弓链式拉弧的受力特性,包括热浮力、空气阻力、电动力、风载荷等,建立了升降弓拉弧电流元的综合受力模型;再通过比较升降弓动态拉弧的风载荷与电动力,重点分析了在接触网相同载流下风载荷对电弧运动所起的作用,进一步探讨了不通风载荷对升降弓拉弧形态的影响。仿真结果表明,利用所提出的仿真模型研究风载荷下高速动车组升降弓拉弧的空间运动形态和长度变化过程是可行的。
英文摘要：
Based on the high-speed electric multiple units （EMU） pantograph-catenary arc of rising and dropping pantograph, the arc dynamic characteristics with the influence of wind-force is investigated. Firstly, combined with the characteristics of chain arc model, the pantograph-catenary arc model of rising and dropping pantograph is established to analyze the spatial force of arc current element. Secondly, taking into account thermal buoyancy, air resistance, electric motive force and wind load, the arc current element force model between pantograph and catenary was built to research the influence of pantograph-catenary arc. Finally, comparing the wind-force with the electric motive force on pantographcatenary arc, the trend of the influence on arc movement under same contact line currents are expressed, moreover the effect on arc motion and variation was also presented. The simulation results demonstrate that the proposed model is effective and capable of simulating the spatial motion and length variation characteristics of arc in the process of high-speed EMU＇s rising and dropping pantograph.
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