基于ANSYS仿真的热轧辊瞬态温度场分析

Transient Temperature Field Analysis of Hot Roll Based on ANSYS Simulation

基于ANSYS有限元软件,从传热学角度对热轧辊的温度场进行模拟,结合热轧辊瞬态温度场数学模型,分析热轧辊的冷却规律。考虑到热轧辊复杂边界条件,采用有限差分法,建立热轧辊表层瞬态温度场计算模型。基于热轧辊在轧制过程中边界条件高度对称,简化热轧辊的仿真模型,得到的ANSYS有限元模型与温度场数学模型计算结果相吻合。仿真结果表明,热轧辊轧制时心部温度分布均匀,表层温度分布梯度较大,轧制区和非轧制区温度差较大。冷却过程中,非轧制区和心部温度会先有一个小幅度上升。这一模型能很好地预测热轧辊瞬态温度分布及掌握轧辊冷却规律。

Based on ANSYS finite element software,the temperature field of hot roll was simulated from the perspective of heat transfer,and the cooling curve of the hot roll was analyzed by combining the mathematical model of the hot roll transient temperature field.Considering the complex boundary conditions of the hot roll,the finite difference method was used to establish the calculation model of the transient temperature field of the hot roll surface.Based on the high symmetry of the boundary conditions of hot roll during the rolling process,the simulation model of the hot roll was simplified,and the ANSYS finite element model obtained by this method was consistent with the temperature field mathematical model.Simulation results show that the core temperature distribution is uniform during hot rolling,the surface temperature distribution gradient is large,and the temperature difference between the rolling zone and the non-rolling zone is large.During the cooling process,the non-rolling zone temperature and the core temperature will first increase slightly.This model can predict the transient temperature distribution of hot rolls and master the cooling rules of rolls.