Reduced order modeling for the dynamic analysis of structures with nonlinear interfaces
(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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- author
- Andersson, Linus LU ; Persson, Peter LU ; Austrell, Per Erik LU and Persson, Kent LU
- organization
- publishing date
- 2019
- 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}}, }