000013636 001__ 13636
000013636 005__ 20161114170125.0
000013636 04107 $$aeng
000013636 046__ $$k2011-05-25
000013636 100__ $$aPawlak, Z.
000013636 24500 $$aOptimization of Structures Equipped with Viscoelastic Dampers Modeled Using the Fractional Order Derivatives.

000013636 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013636 260__ $$bNational Technical University of Athens, 2011
000013636 506__ $$arestricted
000013636 520__ $$2eng$$aViscoelastic (VE) dampers are now among preferable energy dissipation devices used for passive seismic response control. It is the aim of this paper to find the optimal damper placement and to determine the optimal parameters of dampers. The dynamic behavior of VE dampers, as described by the fractional Maxwell rheological model, is written in the form of a fractional differential equation. Fractional models have an ability to correctly describe the behavior of VE materials and dampers using a small number of model parameters. The equation of motion for the structure considered is expressed in the state space. The structure is subjected to a base acceleration. For the harmonic external forces the displacement response of the structure is determined. Solving the equation of motion yields an input-output relationship with the matrix frequency response function. The objective function, which we minimize, is the weighted sum of amplitudes of the transfer functions of interstorey drifts, evaluated at the fundamental, natural frequency of the frame with the dampers. The solution is obtained using the sequential optimization method and the particle swarm optimization method (PSO). The results obtained by both methods are compared.

000013636 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013636 653__ $$aviscoelastic dampers, rheological models, fractional derivative, particle swarm optimization.

000013636 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013636 720__ $$aPawlak, Z.$$iLewandowski, R.
000013636 8560_ $$ffischerc@itam.cas.cz
000013636 8564_ $$s231750$$uhttps://invenio.itam.cas.cz/record/13636/files/415.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 17 Optimization Methods and Applications in Structural Dynamics and Earthquake Engineering.
000013636 962__ $$r13401
000013636 980__ $$aPAPER