A Generalized Translational-Rotational
Tuned Mass Damper (T-R TMD) System For
Passive Control Of Vibrations In Structures
Author(s)
E. A. Mashaly, M. H. El-katt, A. I. M. AL-Janabi
& I. M. Abubakar
Abstract
This paper proposes and studies a generalized tuned mass damper that uses a
translational spring damper attached to a rotational spring damper as a means for
passive energy dissipation. To obtain the optimum design parameters of
T-R TMD attached to an SDOF structure, two methods are used. In the first
method, the Den Hartog model is used where the optimum design parameters are
defined as those parameters that minimize the maximum displacement of the
main structure when subjected to harmonic excitation. In the second method, the
Sadek model is used where the optimum design parameters are defined as the
parameters that would result in equal and large modal damping in the first two
modes of vibration without considering the type of excitation. Numerical
computer procedures are developed to obtain the optimum design parameters for
the both methods. Comparative studies are made to see the effect of the various
T-R TMD properties on the optimum damping ratio and the optimum frequency
ratio. Simplified design equations for the optimum parameters of the T-R TMD
system are also suggested for each method. Finally, SDOF and MDOF framed
structures are selected to investigate the effectiveness of the proposed T-R TMD
system in reducing structural response when subjected to different earthquake
loadings.
Keywords: earthquake vibrations, energy dissipation, passive control, tuned
mass dampers, seismic design.
Keywords
earthquake vibrations, energy dissipation, passive control, tuned
mass dampers, seismic design.
Related Book
Other papers in this volume
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