Numerical investigation of damping of torsional beam vibrations by viscous bimoments

David Hoffmeyer, Jan Høgsberg

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

Abstract

Damping of torsional beam vibrations of slender beam-structures with thin-walled cross-sections is investigated. Analytical results from solving the differential equation governing torsion with viscous bimoments imposed at the boundary, are compared with a numerical approach with three-dimensional, isoparametric elements. The viscous bimoments act on the axial warping displacements associated with inhomogeneous torsion, and are in a numerical format realized by suitable configurations of concentrated, axial forces describing discrete dampers. It is illustrated by an example that significant damping ratios may be obtained for a beam with an open cross-section.

Original languageEnglish
Title of host publication8th Conference on Smart Structures and Materials, SMART 2017 and 6th International Conference on Smart Materials and Nanotechnology in Engineering, SMN 2017
EditorsAlfredo Guemes
PublisherInternational Center for Numerical Methods in Engineering
Publication date2017
Pages1030-1041
ISBN (Electronic)978-849469093-8
Publication statusPublished - 2017
Externally publishedYes
Event8th ECCOMAS Thematic Conference on Smart Structures and Materials, SMART 2017 and 6th International Conference on Smart Materials and Nanotechnology in Engineering, SMN 2017 - Madrid, Spain
Duration: 5. Jun 20178. Jun 2017

Conference

Conference8th ECCOMAS Thematic Conference on Smart Structures and Materials, SMART 2017 and 6th International Conference on Smart Materials and Nanotechnology in Engineering, SMN 2017
Country/TerritorySpain
CityMadrid
Period05/06/201708/06/2017
SponsorCarinthian Tech Research AG (CTR)

Keywords

  • Complex natural frequency
  • Damping
  • Finite element method
  • Torsional beam vibrations
  • Viscous bimoment
  • Warping

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