EACS 2016 paper - PERFORMANCE ASSESSMENT OF A NOVEL ENERGY HARVESTING-ENABLED TUNED MASS-DAMPER-INERTER (EH-TMDI) FOR WHITE NOISE-EXCITED STRUCTURES
journal contributionposted on 28.03.2017, 15:19 by J. Salvi, A. Giaralis
EACS 2016 Paper No. 151
In this paper the potential of a novel dynamic vibration absorber termed energy harvesting-enabled tuned mass-damper-inerter (EH-TMDI) is assessed for simultaneous vibration suppression and power generation in white-noise force- and base acceleration-excited structures modelled as damped single-degree-of-freedom (SDOF) oscillators. The considered EH-TMDI comprises a classical linear TMD incorporating an electromagnetic energy harvester connected in series with an inerter device to link the attached TMD mass to the ground in a sky-hook configuration. Pertinent frequency response functions are analytically derived from the underlying equations of motion of EH-TMDI-equipped SDOF primary structures as functions of a number of dimensionless parameters associated with the mechanical properties of the EH-TMDI device and the primary structure. It is shown through appropriate parametric analyses that by varying the mass amplification constant of the inerter device and by adjusting stiffness and damping properties of the TMD using standard optimum TMD design formulae, enhanced vibration suppression (in terms of deflection variance of the primary structure) and energy harvesting (in terms of relative velocity variance at the terminals of the harvester) may be
achieved simultaneously for a fixed attached TMD mass. Overall, the herein reported analytical data and parametric analysis point to the fact that the EH-TMDI is amenable to a meaningful multi-objective optimum design, which may simultaneously minimise the primary structure oscillations and maximise power generation.