Numerical study of heat transfer on the railway axle box

초록

The railway bogie accompanies an important role to support the rail vehicle and deliver the force of traction or the braking power to a train. On the operation, if the excessive friction between the axle and axle bearing may increase the axle temperature, the derailment of train could happen owing to the axle breakage. In case of the rapid transit, hot box detectors are located on the way side with every 30 km space to detect the axle box temperature. To predict the axle temperature exactly, the temperature distribution of the axle box is needed using the thermal analysis. The finite element model consists of the axle, axle bearings, and the axle box. The axle box was modeled using the tetrahedral elements, and the elements were meshed on the surface of the axle box. The others were modeled with a solid 70 element. All elements were meshed by hexahedron mesh. The computational model was imported to ANSYS and element type was added on the preprocessor. From the material property, temperature and thermal coefficient were imported as a function of time. The equation of the axle temperature was acquired from the experimental results