Abstract
In this paper, a countermeasure of pattern formation phenomena by using dynamic absorbers is investigated experimentally. An experimental equipment of a single degree-of-freedom pattern formation system with a pair of contact rotating rolls and a dynamic absorber are made. The experimental results are compared with the analytical results using approximated characteristic roots. According to the results of the experiments without a dynamic absorber, it is confirmed that the relation among the natural frequency of the system, the polygonal number and the rotating speed agree with the analytical results qualitatively. According to the results of the experiments using a damped dynamic absorber, the delaying effect of pattern formation is confirmed. Also, a good quantitative agreement between the experimental and analytical results is confirmed. According to the results of the experiments using an undamped dynamic absorber, it is confirmed that damping of a dynamic absorber is necessary to delay pattern formation phenomena.
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