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以某热连轧机的工作轧辊作为研究对象,运用ANSYS/LS-DYNA显式动力分析软件建立了轧辊、支承辊以及轧件的三维有限元模型。考虑空冷、水冷和轧辊与轧件热传导的动态边界条件,计算了轧辊的温度场。结合其温度场进行了3D热力耦合分析,得到轧辊耦合应力变化规律。在此基础上运用ANSYS软件后处理疲劳计算模块对轧辊的疲劳寿命进行了计算,得到了轧辊表面疲劳寿命为10.8 h。这与实际生产过程轧辊的磨削时间相符。
Taking a work roll of a hot strip mill as the research object, a three-dimensional finite element model of the roll, the backup roll and the rolling piece was established by using explicit dynamic analysis software ANSYS / LS-DYNA. Considering the dynamic boundary conditions of air-cooling, water-cooling and heat conduction between roll and rolling piece, the temperature field of roll is calculated. Combined with its temperature field, the 3D thermodynamic coupling analysis was carried out to get the change law of coupling stress of the roll. On this basis, the fatigue life of the roller was calculated by using the post-processing fatigue calculation module of ANSYS software. The fatigue life of the roller was 10.8 h. This is consistent with the actual grinding process of the production time.