Suppression of Multimodal Vibrations in Plates With Distributed Dynamic Vibration Absorbers

ABSTRACT Due to the low damping characteristics of thin plate structures, harmful vibrations can easily occur under external excitation, potentially leading to fatigue failure and a reduced service life. A single dynamic vibration absorber (DVA) is often insufficient to effectively suppress the multimodal vibrations of the plate. Moreover, over time, factors such as fastener loosening and rubber aging can cause shifts in the resonant frequency of a single absorber, significantly affecting its vibration suppression performance. To address this issue, this study proposes a vibration suppression strategy for plate structures based on distributed dynamic absorbers. The vibration suppression performance of the distributed DVAs is evaluated by systematically examining the effects of absorber number, mode‐dependent tuning parameters, and spatial arrangement on the first four modal responses of the plate. Unlike conventional multiple‐DVA studies that mainly evaluate the response of the absorber‐equipped structure, the present study introduces mass‐equivalent attached‐mass reference systems with identical physical masses and installation positions. This comparison separates the vibration reduction caused by the dynamic absorber mechanism from that caused solely by the added mass and the associated modification of the plate dynamics. The results provide a clearer physical interpretation of distributed DVA‐based multimodal vibration suppression and offer practical guidance for absorber parameter design and spatial arrangement.