预弛度接触网三维静态形状计算

考虑预弛度接触线的链形接触悬挂,以2种抛物线单元为基础,给出同时受自重、侧向风影响下的链形接触悬挂静态形状计算流程,利用经典力学方法,推导出不同坐标系下接触线、承力索的静态形状,然后合成三维静态形状。最后通过对比有限元仿真结果,验证本计算方法的准确性。应用本研究计算方法可对接触网进行吊弦预配计算和风偏校验计算,指导接触网的设计施工。

Calculation of Three-dimensional Static Shape of Pre-sag Catenary

Regarding the catenary with pre-sag contact wire,based on two parabola elements,the calculation procedure of the static shape of the catenary was put forward which is simultaneously under the influences of both the self weight and the cross wind. Further,by using the method of classical mechanics,the static shapes of both the contact wire and the messenger wire in different coordinate systems were deduced, and then the three-dimensional static shape was synthesized. Finally, by comparing with the finite element simulation results,the accuracy of this calculation method was validated. It can be concluded that,the above-mentioned calculation method can be used for calculating the dropper,checking the wind deflection,and guiding the design and construction of catenary.