坡度和曲线线路对弓网受流性能影响规律研究

在高速列车关键力学问题的研究中,坡度和曲线线路对弓网受流性能的影响不可忽视,为此,采用有限元技术和多体动力学理论,搭建了全空间范围内的车弓网动力学仿真模型,对定坡度、竖曲线和平曲线区段的弓网受流性能进行了研究。研究结果表明:接触线在坡度变化率为零时,线路对弓网动态响应影响并不明显;坡度变化率为正时,线路会使弓网机械磨耗降低,受流稳定性也会降低,但弓网电气损耗增加;而坡度变化率为负时影响正好相反;平曲线和竖曲线半径越小,弓网受流稳定性越差,仿真时不可忽略,且应在平曲线和竖曲线区段的线路设计、施工、区间限速中加以考虑。

Influence of Rail Line Gradient and Curve on Pantograph-Catenary Dynamic Performance

In the study of the key mechanics problems in high-speed train, the pantograph-catenary dynamic performance under rail line gradient and curve is one of the most important research contents. The finite element technique and multi-body dynamics theory were adopted, a whole space vehicle-pantograph-catenary coupling system simulation platform was built, and then, the dynamic response of the model runs on vertical curve track, constant slope track, horizontal curve track were calculated and studied. The results showed that, when the slope change rate is 0, the influence of line on the dynamic response of the pantograph/catenary isn’t obvious;the positive slope change rate of the contact wire decreases the mechanical wear of pantograph/catenary, the stability of current is reduced, and it increases the electrical wear, but the negative slope change rate of the contact wire makes opposite;the smaller the radius of the vertical and horizontal curve, the worse the stability of the pantograph/catenary dynamic performance, which can not be ignored in the simulation, and it should be considered in the line design, construction and interval speed limit of horizontal curve and vertical curve setting.