Numerical Investigation of Damping of Torsional Beam Vibrations by Viscous Bimoments

David Hoffmeyer, Jan Becker Høgsberg

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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, is oparametric elements. The viscous bimoments act on the axial warping displacements associated with in homogeneous 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 withan open cross–section.
Original languageEnglish
Title of host publicationProceedings of the 8th ECCOMAS Thematic Conference on Smart Structures and Materials
EditorsA. Güemes, A. Benjeddou, J. Rodellar, J. Leng
Number of pages12
PublisherEuropean Community on Computational Methods in Applied Sciences
Publication date2017
Publication statusPublished - 2017
Event8th ECCOMAS Thematic Conference on Smart Structures and Materials - Madrid, Spain
Duration: 5 Jun 20178 Jun 2017

Conference

Conference8th ECCOMAS Thematic Conference on Smart Structures and Materials
CountrySpain
CityMadrid
Period05/06/201708/06/2017

Keywords

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

Cite this

Hoffmeyer, D., & Høgsberg, J. B. (2017). Numerical Investigation of Damping of Torsional Beam Vibrations by Viscous Bimoments. In A. Güemes, A. Benjeddou, J. Rodellar, & J. Leng (Eds.), Proceedings of the 8th ECCOMAS Thematic Conference on Smart Structures and Materials European Community on Computational Methods in Applied Sciences.