Kuciej Michal, Grzes Piotr, Wasilewski Piotr
Faculty of Mechanical Engineering, Bialystok University of Technology (BUT), 45C Wiejska Street, 15-351 Bialystok, Poland.
Frimatrail Frenoplast S.A., 15 Watykańska Street, 05-200 Majdan, Poland.
Materials (Basel). 2020 Oct 29;13(21):4846. doi: 10.3390/ma13214846.
The article proposes two 3D and 2D numerical FE models of frictional heating for the estimation of temperature distributions in railway tread brake in 1xBg configuration during repeated long-term braking. The results of computations were compared with the time courses of temperature measured using thermocouples throughout the duration of the tests on a full-scale dynamometer for two different brake shoe materials in combination with a steel wheel. The resulting temperature distributions calculated using the proposed models agreed well with the experimental measurements, and the maximum difference in temperature values does not exceed 20%. It has been proven that 2D FE model can be as efficient as 3D model to estimate the temperature distribution during long-term and variable braking in the considered friction node. The differences in the calculation of the temperature values using these models did not exceed 3%, and the calculation time for the 2D model, compared to the 3D model, was shorter approximately 85 times for the braking cycle lasting 5032 s, and approximately 45 times for the braking cycle lasting 3297 s.
本文提出了两种用于估算1xBg配置的铁路踏面制动在长期反复制动过程中温度分布的摩擦热3D和2D数值有限元模型。计算结果与在全尺寸测功机上对两种不同闸瓦材料与钢轮组合进行测试的整个过程中使用热电偶测量的温度随时间变化的曲线进行了比较。使用所提出的模型计算得到的温度分布与实验测量结果吻合良好，温度值的最大差异不超过20%。已经证明，在考虑的摩擦节点处，2D有限元模型在估算长期和可变制动过程中的温度分布方面与3D模型一样有效。使用这些模型计算温度值的差异不超过3%，对于持续5032秒的制动周期，2D模型的计算时间比3D模型短约85倍，对于持续3297秒的制动周期，2D模型的计算时间比3D模型短约45倍。
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