考虑接触网零部件影响的接触网波动速度研究

The Research on the Fluctuation Velocity of Catenary under the Effect of Auxiliany Parts

以张力梁为模型,借助弹性体振动力学理论的数值方法,考虑附加在接触线和承力索上的吊弦、定位器、支撑杆等器件的载荷,推导接触线和承力索的波动速度。计算结果显示:接触网的波动由多阶波长的振动波组成,且各振动波的波动速度各不相同;吊弦、定位器对接触线的波动速度影响很大,会显著降低波动速度。本文修正了不考虑吊弦、定位器和承力索影响的接触网波动速度计算方法,阐明了接触网的振动特性。

Dealing with the tensile beam model with the numerical method of oscillation mechanics of elastic bodies and taking into consideration the loads of dropper strings, locators ~ supports attached to contact wires and messenger wires, the velocities of wave motions of contact wires and messenger wires were deduced. The calculation results indicate as follows： Wave motions of catenary wires consist of multiple harmonics of differ- ent wavelengths and velocities; dropper strings and locators impose a tremendous impact on the wave velocities of contact wires, i. e. , the wave velocities are reduced hugely. This paper has improved the previous methods of calculating wave velocities of the catenary in absence of the impact of dropper strings, locators and messen- ger wires, thus up-lifting the level of study on the vibration characteristics of the catenary system.