受电弓与接触网动态仿真模型建立及其确认

摘要

利用有限元法建立受电弓与接触网的动态仿真模型.受电弓可等效为三质量-阻尼-刚度系统,考虑吊弦为仅受拉力的非线性单元,接触网可等效为空间杆-梁-索单元组成的系统,弓网滑动接触模型以罚函数法处理,通过直接时间积分得出节点位移与单元受力结果.依据EN50318中有关弓网动态仿真模型的确认方法,结合京津城际和京沪高铁弓网动态测试数据,进行标准模型和现场实测的比较,确认本仿真模型是可信赖的,为弓网系统设计与结构优化提供一种有力手段和研究工具.%Dynamic simulation model of pantograph and catenary was built using the finite element method. Pantograph is equivalent to a three-mass-damper-stiffness system. Considering droppers as nonlinear elements only stressed by tension, catenary is equivalent to an assembly of 3D bar, beam and cable elements. Sliding contact model of pantograph and catenary was handled by penalty function. Nodal displacement and element stress can be obtained by direct time integration. According to the confirmation method of EN50318, the credibility of the simulation system can be confirmed by the comparison of standard model with the measured data from working sites in Beijing-Tianjin intercity railway and Beijing-Shanghai high-speed railway. This simulation system provides an efficient way for the design and structure optimization of pantograph and catenary system.