The present work is focused on the analysis of the effectiveness of dynamic vibrationabsorbers applied to beams excited by moving loads. The goal is to test the performanceof nonlinear dampers in comparison with the classical linear damper. Simply supportedbeams are analysed using the Euler–Bernoulli theory, the partial differential equationgoverning the beam dynamics are reduced to an ordinary differential equation set bymeans of the Galerkin–Bubnov method, and a multimode expansion of the displacementfield allows accurate analysis of the problem. The performance of the dynamicdampers in vibration reduction is estimated through two indicators, the maximumamplitude of vibration, and the portion of energy dissipated by the dynamic damper.The same indicators are used as objective functions for developing an optimisationapproach. Two conservation laws are found for the optimal parameters and beamgeometry for nonlinear (cubic) dynamic dampers.

Vibration reduction on beams subjected to moving loads using linear and nonlinear dynamic absorbers / F. S., Samani; Pellicano, Francesco. - In: JOURNAL OF SOUND AND VIBRATION. - ISSN 0022-460X. - STAMPA. - 325(4-5):(2009), pp. 742-754.

Vibration reduction on beams subjected to moving loads using linear and nonlinear dynamic absorbers

PELLICANO, Francesco
2009-01-01

Abstract

The present work is focused on the analysis of the effectiveness of dynamic vibrationabsorbers applied to beams excited by moving loads. The goal is to test the performanceof nonlinear dampers in comparison with the classical linear damper. Simply supportedbeams are analysed using the Euler–Bernoulli theory, the partial differential equationgoverning the beam dynamics are reduced to an ordinary differential equation set bymeans of the Galerkin–Bubnov method, and a multimode expansion of the displacementfield allows accurate analysis of the problem. The performance of the dynamicdampers in vibration reduction is estimated through two indicators, the maximumamplitude of vibration, and the portion of energy dissipated by the dynamic damper.The same indicators are used as objective functions for developing an optimisationapproach. Two conservation laws are found for the optimal parameters and beamgeometry for nonlinear (cubic) dynamic dampers.
325(4-5)
742
754
Vibration reduction on beams subjected to moving loads using linear and nonlinear dynamic absorbers / F. S., Samani; Pellicano, Francesco. - In: JOURNAL OF SOUND AND VIBRATION. - ISSN 0022-460X. - STAMPA. - 325(4-5):(2009), pp. 742-754.
F. S., Samani; Pellicano, Francesco
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/619205
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