The low temperature and high humidity regions are prone to freezing rain during winter, causing the formation of icicles on the surface of the stayed-cable cylindrical structure. When dislodged by gravity and wind, these icicles may fall and significantly impede the normal movement of vehicles, posing a danger to pedestrians. In this paper, a new organic positive temperature coefficient (PTC) electrothermal film with a Curie temperature of 1 °C is developed by mixing 107 methyl room temperature vulcanized silicone rubber, acetylene black and n-tetradecane through continuous stirring. Subsequently, a numerical simulation of the anti-icing model for the stayed-cable cylindrical structure is established based on the resistivity-temperature characteristics of the new organic PTC electrothermal film. The analysis include variations in the critical anti-icing power of the stayed-cable cylindrical structure with different diameters, horizontal angles, wind speeds and environmental temperatures are analyzed. Finally, the anti-icing experiments are conducted under natural conditions using the stayed-cable cylindrical structure covered with the PTC electrothermal film. The results of the numerical simulation are compared with the natural experimental results, showing a relative error within 3%. This indicates that the anti-icing model of the stayed-cable cylindrical structure is appropriate. The findings of this work provides a theoretical and experimental basis for the subsequent design of an anti-icing device on the basis of PTC electrothermal film.

中文翻译：

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基于低居里温度正温度系数（PTC）电热膜的斜拉索圆筒结构临界防冰能力研究

低温高湿地区冬季容易出现冻雨，导致斜拉索筒状结构表面形成冰柱。当重力和风的作用下，这些冰柱可能会掉落并严重阻碍车辆的正常行驶，对行人构成危险。本文将107甲基室温硫化硅橡胶、乙炔黑和正十四烷通过连续搅拌混合，研制出一种居里温度为1℃的新型有机正温度系数（PTC）电热膜。随后，基于新型有机PTC电热膜的电阻率-温度特性，建立了斜拉索圆筒结构防冰的数值模拟模型。分析了不同直径、水平角、风速和环境温度的斜拉索圆筒结构临界抗冰能力的变化。最后，利用覆有PTC电热膜的斜拉索圆柱结构在自然条件下进行了防冰实验。数值模拟结果与自然实验结果对比，相对误差在3%以内。这表明斜拉索圆筒结构的防冰模型是合适的。该工作的研究结果为后续设计基于PTC电热膜的防冰装置提供了理论和实验基础。