基于有限元分析的重轨终轧温度场数值模拟分析

Numerical Simulation Analysis of Temperature Field in Heavy Rail Finish Rolling Based on Finite Element Analysis

基于传热学及有限元理论,采用SolidWorks三维软件,建立60kg/m、U75V重轨三维瞬态非线性有限元模型。采用ANSYS Workbench对重轨轧制后自然空冷过程中的温度场进行有限元数值模拟,并在不同初始条件下做对比分析。分析结果表明:重轨在冷却过程中,轨头的温度始终最高,轨腰、轨底依次降低,两端部温度较中部温度低;不同环境温度时,温度越低终冷温度越低;相同环境温度,断面温度越高,终冷温度越高;不同初始温度,温度越低重轨发生相变越早;相同环境温度,断面温差越大,终冷温度越高。

Based on the heat transfer theory and finite element theory,the three-dimensional transient nonlinear finite element model of U75 Vheavy rail of 60 kg/m was established by using SolidWorks 3D modeling software.ANSYS Workbench was used to simulate the temperature field of the heavy rail during natural air cooling process.And in different initial conditions a comparative analysis was made.The results show that the temperature of the rail head is always the highest in the cooling process,and the temperature of the waist of the rail and the bottom of the rail are reduced in turn.The temperature at both ends is lower than that of the central part.At different ambient temperature,the lower the ambient temperature,the lower the final cooling temperature.At the same ambient temperature,the higher the cross-section temperature,the higher the final cooling temperature.At different initial temperatures,the lower the initial temperature,the earlier the phase transition occurs in heavy rail.At the same ambient temperature,the greater the cross-section temperature difference,the higher the final cooling temperature.