Non-Axisymmetric Modelling of Moving Heat Source for Spatial and Temporal Investigation of Temperature in Railway Vehicles Disc Brake

Urban Rail Transit

Original Research Papers

Kejela Temesgen Deressa¹  Demiss Alemu Ambie² 

[1] African Railway Center of Excellence, Addis Ababa Institute of Technology, Addis Ababa University, Addis Ababa, Ethiopia;School of Mechanical and Industrial Engineering, Addis Ababa Institute of Technology, Addis Ababa University, Addis Ababa, Ethiopia;

关键词: ANSYS APDL;    Disc brake;    Finite element;    Spatial temperature variation;    Moving heat source;   

DOI  :  10.1007/s40864-022-00176-9

 received in 2022-05-31, accepted in 2022-09-09,  发布年份 2022

来源: Springer

【 摘 要 】

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.

【 授权许可】

CC BY   
© The Author(s) 2022

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