Active Warping Control For Damping Of Torsional Beam Vibrations

David Hoffmeyer*, Jan Høgsberg

*Corresponding author for this work

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Abstract

This paper considers damping of torsional beam vibrations by active control of the axial warping displacements. A beam element with active positive position feedback (PPF) is set up with
an additional flexibility parameter. This arises from partial restraining of warping caused by discrete actuators. The flexibility lowers the frequency associated with an infinite actuator gain and thereby the attainable damping ratio. It is shown how it furthermore affects the stability limit. Results are compared with three-dimensional finite element results, with multiple actuators acting on an end cross-section of the beam. The accuracy of the beam model is justified by an example which shows that substantial damping ratios may be achieved by active warping control.
Original languageEnglish
Title of host publicationProceedings of the 9th Conference on Smart Structures and Materials SMART 2019
EditorsA. Benjeddou, N. Mechbal, J.F. Deü
PublisherInternational Center for Numerical Methods in Engineering
Publication date2019
Pages158-168
ISBN (Electronic)978-84-949194-6-6
Publication statusPublished - 2019
EventIX ECCOMAS Thematic Conference on Smart Structures and Materials (SMART 2019) - Paris, France
Duration: 8 Jul 201911 Jul 2019

Conference

ConferenceIX ECCOMAS Thematic Conference on Smart Structures and Materials (SMART 2019)
CountryFrance
CityParis
Period08/07/201911/07/2019

Keywords

  • Torsional beam vibrations
  • Structural dynamics
  • Warping
  • Active control
  • Position feedback
  • Finite element method

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