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.
|Title of host publication||Proceedings of the 8th ECCOMAS Thematic Conference on Smart Structures and Materials|
|Editors||A. Güemes, A. Benjeddou, J. Rodellar, J. Leng|
|Number of pages||12|
|Publisher||European Community on Computational Methods in Applied Sciences|
|Publication status||Published - 2017|
|Event||8th ECCOMAS Thematic Conference on Smart Structures and Materials - Madrid, Spain|
Duration: 5 Jun 2017 → 8 Jun 2017
|Conference||8th ECCOMAS Thematic Conference on Smart Structures and Materials|
|Period||05/06/2017 → 08/06/2017|
- Torsional beam vibrations
- Viscous bimoment
- Complex natural frequency
- Finite element method
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.