结合5000 mm轧机支承辊现有的几种辊型，按照接触应力均布原则提出了一种新的支承辊辊型曲线。利用ABAQUS有限元软件，通过改变轧制参数，进行三维轧制模拟计算，对比分析了新辊型和现有辊型支承辊的应力场、辊系变形以及板形情况，得到了最小接触应力分布辊型曲线；结合有限元分析应力结果，采用局部应力应变法，利用FE-SAFE疲劳分析软件对新辊型和现有辊型支承辊进行了疲劳寿命的估算，证明了新辊型可以有效地提高支承辊的使用寿命。
In accordance with the uniform principles of contact stress, this article proposes a new back-up roll contour through considering several existing back-up roll contours;it also establishes a 3-D finite element rolling model by using the finite element software ABAQUS and changing the rolling parameters to analyze the stress field, bending deformation and plate shape of the new contour and the existing contours and got the minimum contact stress distribution of roll shape curve. We estimate the fatigue life of the new and the existing contour back-up roll by using a local stress-strain method and FE-SAFE fatigue analysis software with the results of the finite element stress analysis. The result of fatigue life esti-mation proves that the new contour of back-up roll can effectively improve the service life of back-up rolls.
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