Railway disc brake is vulnerable to surface damages including fade, wear, squeal, thermal cracks and fatigue being just few of them. To counteract these negative consequences, reliable thermal model that can accommodate space and time variables is essential. The aim of this study is to develop new non-axisymmetric moving heat source and compare its efficiency with pre-existing traditional models. Factors responsible for temperature spatial and temporal variation are identified first and then programmed in ANSYS APDL similar capability to a FORTRAN. Heat flux and convection coefficients are calculated by empirical equations and stored in parameters and arrays for later use, based on small time and pad angular increment. The modelling is to successfully solve the problems in traditional models by estimating surface temperature difference as high as 49 °C, within acceptable computation time. Besides, its consideration of radial distance reported variations from traditional models as high as 10% and 60% in moving heat source and axisymmetric, respectively. And, it is also verified with the literature within acceptable variation. Finally, it is suggested that the model can be applied in conducting pad geometry optimization, thermal stress and fatigue life of disc brake.

铁路盘式制动器容易受到表面损坏，包括褪色、磨损、尖叫、热裂纹和疲劳等只是其中的一小部分。为了抵消这些负面影响，能够适应空间和时间变量的可靠热模型至关重要。本研究的目的是开发新的非轴对称移动热源，并将其效率与现有的传统模型进行比较。首先确定造成温度空间和时间变化的因素，然后在 ANSYS APDL 中编程，其功能与 FORTRAN 类似。热通量和对流系数通过经验方程计算并存储在参数和数组中以供以后使用，基于小的时间和垫角增量。该建模旨在通过在可接受的计算时间内估计高达 49 °C 的表面温差来成功解决传统模型中的问题。此外，其对径向距离的考虑报告在移动热源和轴对称方面与传统模型的差异分别高达 10% 和 60%。并且，它也在可接受的变化范围内与文献进行了验证。最后，建议该模型可用于盘式制动器的摩擦片几何优化、热应力和疲劳寿命。