基于有限元法的弓网过渡段处动态性能仿真分析

摘要

For the overlapping section and transition section in the overhead catenary of urban rail transit (URT)as well as the CED1 25D pantograph,based on the ANSYS simulation platform and according to the practical parameters of catenary network of Guangzhou subway,an appropriate finite catenary model was established,which consists of the rigid suspension catenary,the flexible suspension catenary and the transition sections coupling with a three lumped mass model of the CED1 25D pantograph.By the dynamical simulations,the contact force and pantograph head displacement that reflect the dynamic performance of the pantograph-catenary system were obtained.Then the dynamic behaviors and the regular pattern of the pantograph-catenary system under the conditions that the pantograph goes through the different sections of catenary were analyzed.Comparing the simulation results provided with the field measured results,the correctness and the effectiveness of the model were proved.%针对城市轨道交通铁路中采用的接触网锚段关节、刚柔过渡段及 CED125D 受电弓结构，基于 ANSYS 有限元软件，采用广州地铁实际接触网线路的基本参数，建立包含刚性接触网、柔性接触网及刚柔过渡段的接触网模型以及简化为弹簧阻尼机构的 CED125D 受电弓归算质量模型。通过动力学仿真分析得到反映弓网系统动态性能的接触压力与抬升位移等数据，进而对受电弓在通过锚段关节、刚柔过渡段时的动力学行为及规律进行探讨与研究。与实测结果比较，所建立的弓网系统有限元模型是正确和有效的。