A three-dimensional nonlinear reduced-order predictive joint model

Song, Y; Hartwigsen, CJ; Bergman, LA; Vakakis, AF

dc.contributor.author	Song, Y	en
dc.contributor.author	Hartwigsen, CJ	en
dc.contributor.author	Bergman, LA	en
dc.contributor.author	Vakakis, AF	en
dc.date.accessioned	2014-03-01T01:52:57Z
dc.date.available	2014-03-01T01:52:57Z
dc.date.issued	2003	en
dc.identifier.issn	16713664	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/26792
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-4243160298&partnerID=40&md5=39f445a1e49d87f229eceb0be9c182d3	en
dc.subject	Adjusted iwan beam element (AIBE)	en
dc.subject	Bolted joints	en
dc.subject	Multi-layer feed-forward neural networks (MLFF)	en
dc.subject	Nonlinear dynamic analysis	en
dc.subject	Parameter identification	en
dc.subject.other	Acceleration	en
dc.subject.other	Bolted joints	en
dc.subject.other	Computer simulation	en
dc.subject.other	Feedforward neural networks	en
dc.subject.other	Finite element method	en
dc.subject.other	Identification (control systems)	en
dc.subject.other	Multilayer neural networks	en
dc.subject.other	Rotation	en
dc.subject.other	Structural analysis	en
dc.subject.other	Vibrations (mechanical)	en
dc.subject.other	Adjusted Iwan beam element (AIBE)	en
dc.subject.other	Impulsive loading	en
dc.subject.other	Multi-layer feed-forward neural networks (MLFF)	en
dc.subject.other	Nonlinear dynamic analysis	en
dc.subject.other	Earthquakes	en
dc.title	A three-dimensional nonlinear reduced-order predictive joint model	en
heal.type	journalArticle	en
heal.publicationDate	2003	en
heal.abstract	Mechanical joints can have significant effects on the dynamics of assembled structures. However, the lack of efficacious predictive dynamic models for joints hinders accurate prediction of their dynamic behavior. The goal of our work is to develop physics-based, reduced-order, finite element models that are capable of replicating the effects of joints on vibrating structures. The authors recently developed the so-called two-dimensional adjusted Iwan beam element (2-D AIBE) to simulate the hysteretic behavior of bolted joints in 2-D beam structures. In this paper, 2-D AIBE is extended to three-dimensional cases by formulating a three-dimensional adjusted Iwan beam element (3-D AIBE). Impulsive loading experiments are applied to a jointed frame structure and a beam structure containing the same joint. The frame is subjected to excitation out of plane so that the joint is under rotation and single axis bending. By assuming that the rotation in the joint is linear elastic, the parameters of the joint associated with bending in the frame are identified from acceleration responses of the jointed beam structure, using a multi-layer feed-forward neural network (MLFF). Numerical simulation is then performed on the frame structure using the identified parameters. The good agreement between the simulated and experimental impulsive acceleration responses of the frame structure validates the efficacy of the presented 3-D AIBE, and indicates that the model can potentially be applied to more complex structural systems with joint parameters identified from a relatively simple structure.	en
heal.journalName	Earthquake Engineering and Engineering Vibration	en
dc.identifier.volume	2	en
dc.identifier.issue	1	en
dc.identifier.spage	59	en
dc.identifier.epage	73	en