一种新的考虑接触角的弓网接触模型

New pantograph/catenary contact model considering the influence of contact angle

通过考虑弓网滑动接触过程中实际存在的接触角的影响,对Lankarani提出的赫兹接触模型进行修正,提出了一种新的弓网接触模型,并与传统接触模型和Lankarani赫兹接触模型进行对比,辨识了不同接触模型对弓网系统动力学性能的影响。结果表明:与经典接触模型相比,赫兹接触模型考虑了弓网间阻尼的影响,使得后者较前者在高速条件下接触力变化更为平缓;新接触模型与Lankarani接触模型相比,在高速条件下接触力变化更为剧烈,特别是在定位器附近;在高速条件下,弓网间阻尼以及接触角对接触力的影响不可忽略,采用新提出的接触模型进行弓网动力学仿真更为合理。

Taking into consideration the influence of contact angle during the process of pantograph/catenary sliding contact,the Lankarani Hertz contact model was modified and a new pantograph/catenary contact model was proposed.The effects of using the traditional contact model,the Lankarani Hertz contact model and the proposed model,on the dynamic performances of a pantograph/catenary system were investigated.The results show that compared with the traditional contact model,the Hertz contact model considers the effect of damping between pantograph and catenary,and makes the contact force variation much gentler.For the new contact model,the contact force variation becomes more severe than that of the Lankarani model at high speed,especially in the vicinity of the registration;At high speed,the influences of the damping between pantograph and catenary and the contact angle can not be neglected,and it is more reasonable to adopt the new contact model to perform pantograph/catenary dynamic simulations.