二维和三维弓网耦合动力学模型适用性分析

针对二维和三维弓网耦合动力学模型,根据接触网模态、接触压力、接触线抬升位移、弓头振动加速度及其频谱特性,分析了两种模型在弓网耦合动力学仿真中的区别;采用三维弓网模型分析了接触网在横风作用时,接触线风振位移对弓网接触压力的影响。计算结果表明二维和三维弓网模型获得的仿真结果基本一致,弓网横向相对运动对其垂向动力学行为影响较小;三维模型适用于横风条件下的弓网动力学仿真,横风载荷对弓网接触压力具有显著影响,导致弓网受流质量变差。

Analysis of the Applicability of 2D and 3D Pantograph-Catenary Coupled Dynamical Model

Based on the modal characteristics of catenary, the dynamic contact forces, the uplift displacements of contact wire, the accel- eration of collector head and the dynamic spectral characteristics, the differences between the 2D and the 3D pantograph-catenary cou- pled dynamical model for pantograph catenary interaction were discussed. Moreover, the 3D model was applied to study the influence of wind-induced vibration of the catenary on the contact forces between the collector strips and the contact wire while the catenary was subjected to the action of crosswind. The research indicates that there is good agreement between the simulation results obtained by the 2D model and that by the 3D model, and the effect of the lateral relative movement of the pantograph and catenary on the vertical dy- namical behavior of the current collection system can be ignored. The 3D model can be used to analyze the responses of the pantograph and catenary system in crosswind condition. The crosswind loads have great effect on the contact forces and make the quality of current collection get worse.