Targeted energy transfers in vibro-impact oscillators for seismic mitigation

Nucera, F; Vakakis, AF; McFarland, DM; Bergman, LA; Kerschen, G

dc.contributor.author	Nucera, F	en
dc.contributor.author	Vakakis, AF	en
dc.contributor.author	McFarland, DM	en
dc.contributor.author	Bergman, LA	en
dc.contributor.author	Kerschen, G	en
dc.date.accessioned	2014-03-01T01:27:22Z
dc.date.available	2014-03-01T01:27:22Z
dc.date.issued	2007	en
dc.identifier.issn	0924-090X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18421
dc.subject	Frequency-Energy Plot	en
dc.subject	Nonlinear Energy Pumping	en
dc.subject	Seismic Mitigation	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.classification	Mechanics	en
dc.subject.other	Energy transfer	en
dc.subject.other	Nonlinear systems	en
dc.subject.other	Seismic prospecting	en
dc.subject.other	Structural analysis	en
dc.subject.other	Vibration analysis	en
dc.subject.other	Frequency-Energy Plots	en
dc.subject.other	Nonlinear Energy Pumping	en
dc.subject.other	Seismic Mitigation	en
dc.subject.other	Seismic protection	en
dc.subject.other	Oscillators (mechanical)	en
dc.title	Targeted energy transfers in vibro-impact oscillators for seismic mitigation	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s11071-006-9189-7	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s11071-006-9189-7	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	In the field of seismic protection of structures, it is crucial to be able to diminish 'as much as possible' and dissipate 'as fast as possible' the load induced by seismic (vibration-shock) energy imparted to a structure by an earthquake. In this context, the concept of passive nonlinear energy pumping appears to be natural for application to seismic mitigation. Hence, the overall problem discussed in this paper can be formulated as follows: Design a set of nonlinear energy sinks (NESs) that are locally attached to a main structure, with the purpose of passively absorbing a significant part of the applied seismic energy, locally confining it and then dissipating it in the smallest possible time. Alternatively, the overall goal will be to demonstrate that it is feasible to passively divert the applied seismic energy from the main structure (to be protected) to a set of preferential nonlinear substructures (the set of NESs), where this energy is locally dissipated at a time scale fast enough to be of practical use for seismic mitigation. It is the aim of this work to show that the concept of nonlinear energy pumping is feasible for seismic mitigation. We consider a two degree-of-freedom (DOF) primary linear system (the structure to be protected) and study seismic-induced vibration control through the use of Vibro-Impact NESs (VI NESs). Also, we account for the possibility of attaching to the primary structure additional alternative NES configurations possessing essential but smooth nonlinearities (e.g., with no discontinuities). We study the performance of the NESs through a set of evaluation criteria. The damped nonlinear transitions that occur during the operation of the VI NESs are then studied by superimposing wavelet spectra of the nonlinear responses to appropriately defined frequency - energy plots (FEPs) of branches of periodic orbits of underlying Conservative systems. © 2007 Springer Science+Business Media, Inc.	en
heal.publisher	SPRINGER	en
heal.journalName	Nonlinear Dynamics	en
dc.identifier.doi	10.1007/s11071-006-9189-7	en
dc.identifier.isi	ISI:000249972400019	en
dc.identifier.volume	50	en
dc.identifier.issue	3	en
dc.identifier.spage	651	en
dc.identifier.epage	677	en