Dynamical response analysis of jointed structures by 2-D/3-D adjusted Iwan beam elements

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	2014-03-01T02:49:23Z
dc.date.available	2014-03-01T02:49:23Z
dc.date.issued	2003	en
dc.identifier.issn	02734508	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/34573
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0041966157&partnerID=40&md5=054fb8472f712ea4985846b25135391c	en
dc.subject.other	Beams and girders	en
dc.subject.other	Bolted joints	en
dc.subject.other	Feedforward neural networks	en
dc.subject.other	Finite element method	en
dc.subject.other	Three dimensional	en
dc.subject.other	Two dimensional	en
dc.subject.other	Adjusted Iwan beam elements	en
dc.subject.other	Mechanical joints	en
dc.subject.other	Dynamic response	en
dc.title	Dynamical response analysis of jointed structures by 2-D/3-D adjusted Iwan beam elements	en
heal.type	conferenceItem	en
heal.publicationDate	2003	en
heal.abstract	The two-dimensional adjusted Iwan beam element (2-D AIBE) has been developed by the authors to simulate the nonlinear dynamic behavior of bolted joints in 2-D jointed beam structures. The 2-D AIBE consists of two adjusted Iwan models that are arranged to represent two-dimensional beam behavior. In this paper, a three-dimensional adjusted Iwan beam element (3-D AIBE) is presented to represent the 3-D nonlinear behavior of bolted joints. In the 3-D AIBE, the bending behavior of the 3-D beam element in two uncoupled bending planes is addressed by two 2-D AIBEs, respectively. Extension is represented by one adjusted Iwan model; and another adjusted Iwan model accounts for torsion. 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 multilayer 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, also, 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	Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference	en
dc.identifier.volume	3	en
dc.identifier.spage	1867	en
dc.identifier.epage	1877	en