Damping of Torsional Beam Vibrations by Control of Warping Displacement

Jan Becker Høgsberg, David Hoffmeyer, Christian Ejlersen

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Abstract

Supplemental damping of torsional beam vibrations is considered by viscous bimoments acting on the axial warping displacement at the beam supports. The concept is illustrated by solving the governing eigenvalue problem for various support configurations with the applied bimoments represented as viscous boundary conditions. It is demonstrated that properly calibrated viscous bimoments introduce a significant level of supplemental damping to the targeted vibration mode and that the attainable damping can be accurately estimated from the two undamped problems associated with vanishing and infinite viscous parameters, respectively.
Original languageEnglish
Article number014501
JournalJournal of Vibration and Acoustics
Volume138
Number of pages5
ISSN1048-9002
DOIs
Publication statusPublished - 2016

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