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Reduced order modeling for the dynamic analysis of structures with nonlinear interfaces

Andersson, Linus LU ; Persson, Peter LU ; Austrell, Per Erik LU and Persson, Kent LU (2019) 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2019 In COMPDYN Proceedings 2. p.2395-2406
Abstract

In the present paper, linear substructures with nonlinearities localized at their interfaces, such as the joints in a beam structure, are studied. By subdivision of the total structure into substructures, reduced subsystems are obtained by component mode synthesis. Nonlinear elements are introduced at supports or between substructures. A numerical example is presented where a beam subjected to blast loading is studied. The influence of the nonlinear behavior as well as the number of retained fixed-interface normal modes in the reduced subsystems are evaluated. The response is also compared to the response of equivalent single-degree-of-freedom systems, which are frequently employed in blast load design calculations. For the load cases... (More)

In the present paper, linear substructures with nonlinearities localized at their interfaces, such as the joints in a beam structure, are studied. By subdivision of the total structure into substructures, reduced subsystems are obtained by component mode synthesis. Nonlinear elements are introduced at supports or between substructures. A numerical example is presented where a beam subjected to blast loading is studied. The influence of the nonlinear behavior as well as the number of retained fixed-interface normal modes in the reduced subsystems are evaluated. The response is also compared to the response of equivalent single-degree-of-freedom systems, which are frequently employed in blast load design calculations. For the load cases studied, the displacement computed from an equivalent single-degree-of-freedom system correspond fairly well to the displacement given by a refined two-dimensional beam model, reduced by substructuring. In contrast, the shear force differs significantly due to that higher order modes are neglected in the single-degree-of-freedom system.

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Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Blast Loading, Component Mode Synthesis, Structural Dynamics, Substructuring
host publication
COMPDYN 2019 - 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Proceedings
series title
COMPDYN Proceedings
editor
Papadrakakis, Manolis and Fragiadakis, Michalis
volume
2
pages
12 pages
publisher
National Technical University of Athens
conference name
7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2019
conference location
Crete, Greece
conference dates
2019-06-24 - 2019-06-26
external identifiers
  • scopus:85079044759
ISSN
2623-3347
ISBN
9786188284470
project
Reduced Order Modeling and Substructuring - Applications in Nonlinear Structural Dynamics
language
English
LU publication?
yes
id
11f9310a-d394-476d-9444-3689d3751450
date added to LUP
2020-02-17 11:40:40
date last changed
2024-03-04 14:18:48
@inproceedings{11f9310a-d394-476d-9444-3689d3751450,
  abstract     = {{<p>In the present paper, linear substructures with nonlinearities localized at their interfaces, such as the joints in a beam structure, are studied. By subdivision of the total structure into substructures, reduced subsystems are obtained by component mode synthesis. Nonlinear elements are introduced at supports or between substructures. A numerical example is presented where a beam subjected to blast loading is studied. The influence of the nonlinear behavior as well as the number of retained fixed-interface normal modes in the reduced subsystems are evaluated. The response is also compared to the response of equivalent single-degree-of-freedom systems, which are frequently employed in blast load design calculations. For the load cases studied, the displacement computed from an equivalent single-degree-of-freedom system correspond fairly well to the displacement given by a refined two-dimensional beam model, reduced by substructuring. In contrast, the shear force differs significantly due to that higher order modes are neglected in the single-degree-of-freedom system.</p>}},
  author       = {{Andersson, Linus and Persson, Peter and Austrell, Per Erik and Persson, Kent}},
  booktitle    = {{COMPDYN 2019 - 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Proceedings}},
  editor       = {{Papadrakakis, Manolis and Fragiadakis, Michalis}},
  isbn         = {{9786188284470}},
  issn         = {{2623-3347}},
  keywords     = {{Blast Loading; Component Mode Synthesis; Structural Dynamics; Substructuring}},
  language     = {{eng}},
  pages        = {{2395--2406}},
  publisher    = {{National Technical University of Athens}},
  series       = {{COMPDYN Proceedings}},
  title        = {{Reduced order modeling for the dynamic analysis of structures with nonlinear interfaces}},
  volume       = {{2}},
  year         = {{2019}},
}