Numerical Simulation and Study of Icing Characteristics of High-speed Railway Catenary under Different Environmental Conditions

As high-speed rail networks expand, the regions traversed by catenary become increasingly complex. Frequent rain and snow disasters exacerbate the deterioration of the pantograph-catenary system due to ice accumulation, posing a significant threat to the safety and smooth operation of trains. Addressing the issue of catenary icing, this study establishes a numerical calculation model for catenary icing based on icing mechanisms. By analyzing variables such as environmental temperature, wind speed, and liquid water content affecting the icing process, an algorithm for tracking the icing state of the catenary is proposed. Firstly, key parameters such as collision coefficients and freezing coefficients are obtained through the study of the icing mechanism of the catenary. Then, using APDL files, the secondary development of the catenary icing model is completed to obtain data on icing thickness under different icing environments. Finally, utilizing a state tracking algorithm based on sensitivity and monotonicity, the impact of different environmental parameters on the rate of icing thickness growth is assessed. Through the aforementioned research, precise detection of icing conditions can be achieved, laying the foundation for selecting pantograph-catenary control strategies.