Dynamic characteristics of printing cylinder with rotating dynamic load

Xiaofei Lei, Heping Hou, Zhaoshuan Zha, Shanhui Liu, Boyang Xu, Peng Liu
2020 Mathematical Models in Engineering  
The structural vibration of the center impression cylinder in the flexographic printing machine will bring about production quality problems such as printing ghosts. To this problem, it become an important method to analysis the dynamic characteristics of the center impression cylinder. In this paper, a three-dimensional structural model of the central impression cylinder is established, and builds the dynamic model in finite element software. The vibration modes of the central impression
more » ... er were studied in the simple-supported system at both ends of the static impression cylinder. In view of the real existence of the rotating dynamic load, the evolution law of the natural frequency and mode shape of the cylinder with the rotating dynamic load is discussed. It is found that as the rotation speed increases, the natural frequency undergoes two steps, and the natural frequency after each step will keep continuity with the high first-order natural frequency, and the modal shape is the same as the high-order original mode. Then, the mode shape is continuously changed, not have a step.
doi:10.21595/mme.2020.21253 fatcat:cllmigkoivfhphnqmgljgbfnyy