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Robust design of tuned mass dampers attached to host structures containing uncertainties in the form of fuzzy parameters

par Crollen-Vandromme, Emanuel;Pathak, Shashank ;Soltani, P;Collette, Christophe ;Deraemaeker, Arnaud
Référence ISMA 2020 Conference on Noise and Vibration Engineering(7-9 September 2020: Leuven, Belgium), ISMA 2020 Conference on Noise and Vibration Engineering, ISMA 2020 Conference on Noise and Vibration Engineering
Publication Publié, 2020-09-07

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Résumé :

A robust design of tuned mass dampers (TMDs) must consider the influence of uncertainties associated withstructural parameters to avoid detuning and malfunctioning. The existing robust equal-peak approach [1]accounts for uncertainties in stiffness and damping of single degree-of-freedom (SDOF) host structures butmay lead to a high computational cost and sub-optimal design in practical cases where host structures arerepresented by a large number of degrees-of-freedom and also exhibit some damping. To overcome theselimitations, a numerical optimisation technique is proposed which has the advantage of a low computationalcost and generalization to any type of model of the host structure, including damping. Additionally, toaccount for the fact that the bounds of the uncertainty intervals are never known exactly for real-life conditions,this study employs fuzzy numbers to represent the structural uncertainties. The proposed approach isillustrated in case of an existing footbridge located in Durbuy (Belgium).