Flutter and dissipation instabilities in structures subject to friction follower forces

Davide Bigoni, Oleg Kirillov, Diego Misseroni, Giovanni Noselli, Mirko Tommasini

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Abstract

Flutter and divergence instabilities are theoretically and experimentally analyzed in elastic structures with internal and external damping. Despite of the fact that only the former (and not the latter) was believed to be a destabilizing effect, it is theoretically demonstrated that the external damping plays a role similar to internal damping, so that both yield a pronounced destabilization paradox (in the Ziegler sense). This finding and other features of the Beck and Pflueger columns are substantiated by an experimental campaign in which the follower forces are obtained via dry friction with a newly designed experimental apparatus.
Original languageEnglish
Publication statusPublished - 1 Aug 2016
Event24th International Congress of Theoretical and Applied Mechanics (ICTAM2016) - Montreal, Canada
Duration: 1 Aug 2016 → …

Conference

Conference24th International Congress of Theoretical and Applied Mechanics (ICTAM2016)
Period1/08/16 → …

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