Quick forecasting method for plate shape of twenty-high roll mill based on model coupling method

The invention provides a twenty-high roll mill plate shape rapid forecasting method based on a model coupling method, and belongs to the technical field of metallurgical rolling. The method mainly comprises the following steps executed by a computer: collecting equipment parameters of a twenty-high rolling mill, characteristic parameters of typical rolled strips and corresponding rolling process parameters; dividing units and solving influence coefficients; forecasting the transverse distribution value of the pre-tensile stress of the strip during rolling; and strip outlet plate shape transverse distribution during rolling is forecasted. According to the method, the strip plastic deformation model and the roll system elastic deformation model are integrated into a unified linear equation set based on the model coupling method, and iterative calculation between the strip plastic deformation model and the roll system elastic deformation model can be avoided. Two calculation examples show that the calculation re