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SUMMARY:Benefits and Challenges of using Nonlinear Vibration Absorbers in 
 Cyclic Structures - Tobias Weidemann\, PhD student\, University of Stuttga
 rt
DTSTART:20260306T160000Z
DTEND:20260306T170000Z
UID:TALK243730@talks.cam.ac.uk
CONTACT:46601
DESCRIPTION:Cyclic structures are rotationally periodic arrays of (almost)
  identical sectors that can be found in many engineering applications\, su
 ch as bladed disks in turbomachinery. In this talk\, we are going to explo
 re the effectiveness of vibro-impact absorbers in mitigating the near-reso
 nant forced vibrations of cyclic structures. A vibro-impact absorber is a 
 small mass (typically spherical) that freely sits inside a cavity in the p
 rimary structure where it undergoes frequent impacts with the cavity walls
 . It was recently shown that these impacts scatter energy to higher off-re
 sonant modes of the structure\, which are able to dissipate the energy on 
 a much faster timescale than the resonant vibration. The high effectivenes
 s of vibro-impact absorbers for mitigating near-resonant vibrations has so
  far only been shown for non-cyclic/non-periodic structures. When applied 
 to cyclic structures\, however\, we will show that vibro-impact absorbers 
 cause numerous co-existing states of vibration that the structure can poss
 ibly exhibit. While some of these states are favorable for vibration mitig
 ation\, others are characterized by a strong localization of energy in jus
 t a few sectors. We will attempt to answer whether these strongly localize
 d vibrations would be harmful to our cause of mitigating the vibrations or
  not.
LOCATION:JDB Seminar Room\, CUED
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