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中文摘要：
为分析高速铁路接触网线索覆冰对接触线风振响应的影响,首先采用流体力学计算软件Fluent对不同覆冰厚度的接触线进行绕流仿真,分析覆冰对接触线气动系数的影响,然后对作用在接触网上的平均风和脉动风载荷进行计算和仿真,用有限元分析软件MSC-Marc建立高速铁路接触网有限元模型。最后,分别将平均风和脉动风载荷施加到有限元模型中,研究不同覆冰厚度对接触线风致振动响应的影响。研究结果表明：接触线覆冰对其气动参数影响较大;高速铁路接触网风振主要由脉动风引起;线索覆冰厚度增加会导致接触线的风偏增大,也会改变接触线的风振形式;覆冰接触线的振幅随覆冰厚度的增加而增大。因此,应避免线索覆冰对高速铁路接触网系统的危害。
英文摘要：
In order to investigate the influence of icing of contact wires on wind vibration responses of contact wires of catenary systems of high-speed railways,the computational Fluid dynamics software Fluent was adopted to realize streaming simulation of sections of contact wires with different thicknesses of icing and to conduct analysis on the influence of icing on the aerodynamic parameters of the contact wires.The static wind loads and fluctuating wind loads exerted on the catenary were respectively deduced and simulated.The finite element model of the catenary system was established with Software MSC-Marc.Finally the static wind loads and fluctuating wind loads were introduced into the finite element model respectively to study the influence of different icing thicknesses on wind-induced vibration response of contact wires.The research results show as follows：Icing of contact wires changes the relevant aerodynamic parameters largely;wind-induced vibrations of high-speed railway catenary are mainly caused by fluctuating winds;increasing of icing thicknesses of contact wires and carrier cables increase,wind deviations of contact wires and changes the wind vibration mode of contact wires;the vibration amplitudes of iced contact wires are enlarged with increasing of icing thicknesses.Damage of icing of wires and cables to the catenary system of high-speed railways should be avoided.
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