000013361 001__ 13361
000013361 005__ 20161114160338.0
000013361 04107 $$aeng
000013361 046__ $$k2009-06-22
000013361 100__ $$aRizzi, E.
000013361 24500 $$aOn the optimal tuning of tuned mass dampers in structural systems

000013361 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013361 260__ $$bNational Technical University of Athens, 2009
000013361 506__ $$arestricted
000013361 520__ $$2eng$$aThis note deals with the optimal tuning of the free parameters of the so-called Tuned Mass Dampers (TMDs), devices which are conceived to be attached to structural systems in order to reduce the vibrations induced by external actions. First, the basic concepts of classical Den Hartog’s tuning are briefly reviewed and analysed systematically in the general context of damping of the main system and of the TMD device, both for harmonic excitation at the principal mass or at the support. Analytical results are summarised in table form, whereby the different explicit expressions of the normalised amplitude x1 /xst of the primary mass oscillation are given as a function of the various system parameters. Some 2D and 3D maps are also provided to show the role played by the tuning parameters. Optimal tuning is then investigated numerically on a SDOF + TMD system by a minimax procedure. Comparisons to the fundamental tuning by Den Hartog are provided and the effect of structural damping is explored. Useful abacuses are also compiled, for easier access to the best tuning. The dynamical response of a 10-storey shear-type building with a TMD added on top, subjected to El Centro input ground motion is then evaluated numerically. Results show and quantify the reduction of the top-floor displacement after the insertion of the TMD.

000013361 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013361 653__ $$aTuned Mass Damper (TMD), optimal tuning, minimax procedure, abacus of optimal parameters, control of structural vibration, seismic response. Abstract. This note deals with the optimal tuning of the free parameters of the so-called Tuned Mass Dampers (TMDs), devices which are conceived to be attached to structural systems in order to reduce the vibrations induced by external actions. First, the basic concepts of classical Den Hartog’s tuning are briefly reviewed and analysed systematically in the general context of damping of the main system and of the TMD device, both for harmonic excitation at the principal mass or at the support. Analytical results are summarised in table form, whereby the different explicit expressions of the normalised amplitude x1 /xst of the primary mass oscillation are given as a function of the various system parameters. Some 2D and 3D maps are also provided to show the role played by the tuning parameters. Optimal tuning is then investigated numerically on a SDOF + TMD system by a minimax procedure. Comparisons to the fundamental tuning by Den Hartog are provided and the effect of structural damping is explored. Useful abacuses are also compiled, for easier access to the best tuning. The dynamical response of a 10-storey shear-type building with a TMD added on top, subjected to El Centro input ground motion is then evaluated numerically. Results show and quantify the reduction of the top-floor displacement after the insertion of the TMD.

000013361 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013361 720__ $$aRizzi, E.$$iBrescianini, D.$$iScotti, M.
000013361 8560_ $$ffischerc@itam.cas.cz
000013361 8564_ $$s2932550$$uhttps://invenio.itam.cas.cz/record/13361/files/CD532.pdf$$yOriginal version of the author's contribution as presented on CD, section: Active - passive control.
000013361 962__ $$r13074
000013361 980__ $$aPAPER