METHOD TO IDENTIFY THE INSTALLATION STIFFNESS OF MACHINES AND ITS APPLICATION ON A PRINTING UNIT

摘要

A new method is proposed, by which the installation stiffness of machines can be identified on the base of experimental modal data, eigenfrequencies and eigenmodes for changed mounting stiffness can be predicted. The present method is successfully applied on a printing unit of a sheet-fed printing machine, which is investigated experimentally and theoretically. The identified stiffness points out, that the printing unit is unevenly installed, and this fact has been verified through the followed measurement. According to the simulation results, the uneven installation has an obvious influence on the printing quality.