Journal of Structural Dynamics

A Diamond Open Access Journal for High-quality Papers in the Field of Structural Dynamics

pending

 

since :
View(s): 186 (3 ULiège)
Download(s): 11 (0 ULiège)
print
print
Jan Høgsberg

Damping of coupled bending-torsion beam vibrations by a two-dof tmd with analogous coupling

Article
Open Access

Attached document(s)

Version PDF originale

Abstract

Coupled bending-torsion vibrations of a beam with a single cross-section axis of symmetry are mitigated by a two-degree-of-freedom (dof) tuned mass damper with a coupling analogous to that of the beam. By modal truncation a four-degree-of-freedom model is derived for tmd tuning. Because of the analogous tmd properties, a stiffness tuning formula identical to that for the classic tuned mass damper secures inverse relations between all four undamped natural frequencies. Expressions for the tmd damping are subsequently found by a numerical search, which maximizes the smallest of the four damping ratios, resulting in equal damping in three of the four modes. The two-dof coupled tmd is finally assessed by numerical root locus and frequency response analysis for a full flexible beam.

Index by keyword : Structural dynamics, Coupled vibrations, Damping, Tuned mass damper

30/06/2021

To cite this article

Jan Høgsberg, «Damping of coupled bending-torsion beam vibrations by a two-dof tmd with analogous coupling», Journal of Structural Dynamics [En ligne], Issue 1, URL : https://popups.uliege.be/2684-6500/index.php?id=56.

Call for papers

First issue

More info