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

Yaxin Song, C. J. Hartwigsen, Lawrence Bergman, Alexander F. Vakakis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 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, also, indicates that the model can potentially be applied to more complex structural systems with joint parameters identified from a relatively simple structure.

Original languageEnglish (US)
Title of host publication44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624101007
DOIs
StatePublished - Jan 1 2003
Event44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 2003 - Norfolk, VA, United States
Duration: Apr 7 2003Apr 10 2003

Publication series

Name44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

Other

Other44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 2003
CountryUnited States
CityNorfolk, VA
Period4/7/034/10/03

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials
  • Building and Construction
  • Architecture

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  • Cite this

    Song, Y., Hartwigsen, C. J., Bergman, L., & Vakakis, A. F. (2003). Dynamical response analysis of jointed structures by 2-D/3-D adjusted Iwan beam elements. In 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference (44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference). American Institute of Aeronautics and Astronautics Inc.. https://doi.org/10.2514/6.2003-1609