高斯热源与热量分配系数驱动的弓网滑板温度场建模与预测

Modeling and Prediction of Temperature Field of Pantograph Catenary Sliding Plate Driven by Gaussian Heat Source and Heat Distribution Coefficient

摘要: 弓网滑板温度分布受弓网载流滑动摩擦副的表面形貌、机械接触、电接触与表面膜演化的协同影响，并随运动过程中的接触状态与接触斑尺度动态变化，采用全耦合模型准确预测其温度分布难题较大。为此，本文基于COMSOL开展流–固–电–热耦合数值分析，获得其热量分析系数，继而采用高斯热源法在解耦模型下系统考察速度对温升与峰值迁移的影响规律。结果表明，弓网载流滑动摩擦副中滑板所吸收热量与接触压力，速度，电流具有一定的关系，在一定的速度范围内滑板温升会随接触压力增加而减小，说明存在相互对应的接触压力和接触电流。研究结果对载流弓网中部件的单独分析和弓网电流和压力的选取以及高速列车平稳运行提供了参考价值。

Abstract: The temperature distribution of pantograph catenary sliding plate is affected by the surface morphology, mechanical contact, electrical contact and surface film evolution of pantograph catenary current carrying sliding friction pair, and changes dynamically with the contact state and contact spot size in the process of movement. It is difficult to accurately predict the temperature distribution using the fully coupled model. In this paper, the fluid solid electrical thermal coupling numerical analysis is carried out based on COMSOL, and the thermal analysis coefficient is obtained. Then, the influence of velocity on temperature rise and peak migration is systematically investigated by using the Gaussian heat source method under the decoupling model. The results show that the heat absorbed by the sliding plate in the pantograph catenary current carrying sliding friction pair has a certain relationship with the contact pressure, speed and current. Within a certain speed range, the temperature rise of the sliding plate will decrease with the increase of the contact pressure, indicating that there is corresponding contact pressure and contact current. The research results provide reference value for the independent analysis of current carrying pantograph and catenary components, the selection of pantograph and catenary current and pressure, and the smooth operation of high-speed trains.