车体振动及线路坡度对弓网受流性能影响研究

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

利用仿真方法分析弓网系统动态相互作用时,车体振动对弓网受流性能的影响是重要的评估内容。采用有限元技术和多体动力学理论,基于既有商业软件搭建了全空间范围内的车-弓-网耦合系统仿真平台,对不同速度条件下车-弓-网系统的受流性能进行了分析,同时研究了线路坡度对受流性能的影响。研究结果表明,在现有商业运营速度条件下,车-弓-网和弓-网模型受流性能差异不大,同时,线路坡度对弓网系统受流性能的影响有限。从动力学角度来看,轮轨激励导致的车体振动以及由于线路坡度引起的车体姿态变化,不会对电气化铁路的弓网动态相互作用造成显著影响。

When using the simulation method to analyze the dynamic interaction of pantograph-catenary system, the influence of vehicle vibration on pantograph-catenary dynamic performance was an important content of evaluation. Therefore, the finite element technique and multi-body dynamics theory were adopted, based on the existing commercial software, a whole space vehicle-pantograph-catenary coupling system simulation platform was built, and then the dynamic performance of the vehicle-pantograph-eatenary system was calculated under different speeds and different rail line gradients. The results show that, under the condition of the existing commercial train speeds, the vehicle-pantograph-catenary model and pantograph-catenary model have little difference in dynamic performance, the influence of the rail line gradient on the pantograph-catenary dynamic performance is not obvious. From the perspective of dynamics, the vehicle vibration caused by wheel rail excitation and the change of vehicle pose due to the rail line gradient would not influence the pantograph-catenary dynamic interaction of electrified railway.