Abstract：To investigate the way of improving dynamic performances of vertical rolling mills, series modal analysis for the rolling plate of large or medium sized vertical rolling mills were carried out through finite element method software ANSYS to discuss the relationship between the structure parameter adjustments and the dynamic properties. The mode shapes and nature frequencies were analyzed. The results indicate that the dynamical performance of vertical rolling mills can be improved through increasing the thickness of wall neck portion or the thickness of millstone support plate. Their dynamical performance can also be improved through decreasing the height or diameter of rolling plate. Through increasing the thickness of wall neck portion by 100 mm and the millstone support plate by 40 mm, the nature frequency increases 17.77%, which realizes the dynamic optimization of rolling plate.

Keywords：vertical rolling mill; rolling plate; modal analysis