滞后非线性受电弓在多频激励下的共振与分叉问题

The Resonance and Bifurcation in a Hysteretic Nonlinear Pantograph System with Multi-frequency Excitation

当电力机车在常速下运行时 ,受电弓与接触网之间可以保持可靠的接触 ,因而能够保证弓 -网间良好的动态受流。然而 ,随着高速电力机车运行速度的提高 ,将使受电弓的振动加剧 ,出现频繁的离线现象 ,恶化受电弓的受流质量 ,使机车速度受到限制。为改善电力机车受电弓的动力特性 ,降低振动 ,减少弓 -网间离线率 ,弓头悬挂采用具有滞后非线性特性的钢丝绳减振器 ,在实际应用中取得了良好的减振效果。本文探讨了滞后非线性悬挂受电弓的共振条件及分叉特性 ,研究表明 ,在受电弓动力分析中 。

The dynamic behavior of pantograph has a significant influence on the qualities of collecting electric current and the reliability of the locomotive movement.In order to improve the dynamic property,steel wire rope vibration absorber with hysteretic nonlinearity in second system hanging is introduced.Taking two degree of freedom pantograph system as example,this paper deals with the resonance conditions and bifurcation characters of the pantograph system with multi frequency excitations.