计及机械和电气特性的弓网表面热流分析和计算

摘要

针对弓网高额取流所产生的高温热侵蚀，提出一种弓网表面热流源计算评估方法。指出弓网表面温升主要由摩擦、接触电阻和电弧的作用而产生；分析和计算3种温升的热侵蚀过程和影响因素，并选取京津城际客运铁路基础参数进行仿真。仿真结果表明，摩擦热、焦耳热和电弧热一般同时存在并相互影响。分析得出弓网接触压力、风速影响、行车速度、电流变化等对接触线和滑板表面热流的影响规律。%Aiming at the thermal erosion problems caused by high temperatures,detailed pantograph-catenary surface heat flow calculation and evaluation were referred to and a computational model of pantograph and con-tact line was established.It was pointed out that the pantograph-catenary surface heat sources involved temper-atures generated under the action of friction,contact resistances and arcing.The thermal erosion processes and influencing factors of the three types of temperature rise were analyzed and calculated.Simulation was made on the basis of selection of fundamental parameters of the Beij ing-Tianj in Intercity Railway.The simulation re-sults show that the friction heat,Joule heat and arc heat generally exist simultaneously and influence one an-other.The law of pantograph-catenary contact pressures,wind speeds,running speeds and current changes af-fecting contact wire and slide surface heat fluxes was found.