双弓作用下弓网动力学性能

Dynamic Performances of Pantograph-Catenary System with Double Pantographs

建立了接触网有限元模型和双弓集中质量模型,通过接触单元将二者耦合得到弓网系统模型.推导了系统的动力学平衡方程,用直接积分法计算弓网系统的动力学性能参数.结果表明:双弓运行时,后弓对前弓受流的影响较小,前弓对后弓的影响较大;双弓间距对前弓抬升位移和接触力影响较小,对后弓的影响较大.当双弓间距为90或150 m时,对后弓受流最不利;当双弓间距为200或210 m时,后弓受流较好.

Finite element models for the catenary and the double pantographs were derived. The latter was simplified as a multi-lumped-mass system. The two models was coupled by contact elements to form a pantograph-catenary system model, and its dynamic equilibrium equations were presented. The parameters in the pantograph-catenary system model were calculated with the time integration method. The results show that the rear pantograph has a little influence on the current collection performance of the front pantograph, and the front pantograph has an obvious impact on the rear pantograph. The space between the two pantographs has not obvious effect on uplift and contact force of the front pantograph, and has obvious impact on those of the rear pantograph. The current collection performance of the rear pantograph is the worst when the space between the two pantographs is 90 or 150 m, and the preferable space is 200 or 210 m.