摘要
考虑吊弦、定位器、承力索结构参数,分析其特征变化对接触线波速特性的影响。将吊弦和定位器等效为弹簧质量系统,承力索和接触线等效为张力梁结构,建立接触线的振动微分方程,通过模态叠加法求解得到控制方程通解后提取接触网波速公式,同时基于京津线接触网模型仿真计算结果对波速进行验证。结果表明,吊弦数目越多,接触线和承力索的振动同步性越好,接触线波速受承力索张力变化影响更大;承力索的张力越大,接触线的波速也随之增大;考虑吊弦和定位器的质量特性后,接触线波速将显著降低,而在一定范围内定位器的刚度增加则会提高接触线波速。
Based on structure parameters of dropper strings, locators and messenger wires, this paper analyzed the character change effect to the velocity of wave motion. Establishing the vibration differential equation of the catenary system by the way that dropper strings ＆ locators is equivalent to mass ＆ spring structure, messenger wires ＆the contact wires is equivalent to tensile beam. Getting the velocity of wave motion thought modal superposition method. At the same time, verifying the theoretical results though the simulation calculation based on the Beijing--Tianjin line＇s catenary model. The result indicates as follows： Vibration synchronization between contact wires and messenger wires is directly proportional to dropper strings numbers; the tension force of messenger wires has greater impact on velocity of wave motion; Messenger wires＇ tension is large, velocity increases; considering the quality of dropper strings and locators, the velocity of wave motion will significantly reduce. Oppositely, the stiffness of locators will increase velocity of wave motion.
出处
《铁道机车车辆》
2017年第3期67-71,共5页
Railway Locomotive & Car
关键词
接触网
模态叠加法
接触线波速
catenary, modal superposition method, velocity of wave motion
