Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : December 09, 2021 - December 10, 2021
In this study, we take a uniform beam fixed at both ends as a simple example of a continuum, and the optimum design of multiple dynamic dampers is carried out such as to minimize the vibration amplitude in the primary mode against locally subjected external force. to steady vibration. We dealt with the problem of optimally designing characteristic parameters. The number of dynamic dampers was set to 5, and the arrangement was fixed. The masses of the five dynamic dampers were set according to the amplitude of the natural vibration mode of the primary mode. The natural frequency ratio and damping ratio of the dynamic damper were searched by the round-robin method so that the vibration amplitude of the point of interest was minimized. To compare the vibration suppression performance, we also calculated the result when a single dynamic damper was attached to the center of the beam. As a result, when evaluating only the vibration suppression effect, the single dynamic damper is more advantageous, but when the comprehensive evaluation is performed in consideration of the stress generated in the beam, it is found that the multiple dynamic damper is superior.
