A STUDY ON DYNAMIC LOAD HISTORY RECONSTRUCTION USING PSEUDO-INVERSE METHODS

Detalhes bibliográficos
Autor(a) principal: Santos, Ariane Rebelato Silva dos
Data de Publicação: 2017
Outros Autores: Marczak, Rogério José
Tipo de documento: Artigo
Idioma: por
eng
Título da fonte: Revista Interdisciplinar de Pesquisa em Engenharia
Texto Completo: https://periodicos.unb.br/index.php/ripe/article/view/15001
Resumo: Considering that the vibratory forces generally cannot be measured directly at the interface of two bodies, an inverse method is studied in the present work to recover the load history in such cases. The proposed technique attempts to reconstruct the dynamic loads history by using a frequency domain analysis and Moore-Penrose pseudo-inverses of the frequency response function (FRF) of the system. The methodology consists in applying discrete dynamic loads on a finite element model in the time domain and retrieve estimates of the loads at points that cannot be measured, and complementing these data with the experimental results. Since the number of points of interest in general differs from the number of points experimentally tested, the FRF matrix results rectangular, then the need of pseudoinverses. Additionally, a regularization procedure is used to smooth the reconstructed load history, aiming the removal of spurious peaks. A case is illustrated to describe the method.Keywords: Load Reconstruction, Pseudo-Inverse, Moore-Penrose Pseudo-Inverse, Structural Dynamics, Load History.
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spelling A STUDY ON DYNAMIC LOAD HISTORY RECONSTRUCTION USING PSEUDO-INVERSE METHODSConsidering that the vibratory forces generally cannot be measured directly at the interface of two bodies, an inverse method is studied in the present work to recover the load history in such cases. The proposed technique attempts to reconstruct the dynamic loads history by using a frequency domain analysis and Moore-Penrose pseudo-inverses of the frequency response function (FRF) of the system. The methodology consists in applying discrete dynamic loads on a finite element model in the time domain and retrieve estimates of the loads at points that cannot be measured, and complementing these data with the experimental results. Since the number of points of interest in general differs from the number of points experimentally tested, the FRF matrix results rectangular, then the need of pseudoinverses. Additionally, a regularization procedure is used to smooth the reconstructed load history, aiming the removal of spurious peaks. A case is illustrated to describe the method.Keywords: Load Reconstruction, Pseudo-Inverse, Moore-Penrose Pseudo-Inverse, Structural Dynamics, Load History.Programa de Pós-Graduação em Integridade de Materiais da Engenharia2017-02-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.unb.br/index.php/ripe/article/view/1500110.26512/ripe.v2i20.15001Revista Interdisciplinar de Pesquisa em Engenharia; Vol. 2 No. 20 (2016): MODELING SIMULATION AND CONTROL OF AEROSPACE AND NAVAL STRUCTURES DYNAMICS (II); 31-36Revista Interdisciplinar de Pesquisa em Engenharia; v. 2 n. 20 (2016): MODELING SIMULATION AND CONTROL OF AEROSPACE AND NAVAL STRUCTURES DYNAMICS (II); 31-362447-6102reponame:Revista Interdisciplinar de Pesquisa em Engenhariainstname:Universidade de Brasília (UnB)instacron:UNBporenghttps://periodicos.unb.br/index.php/ripe/article/view/15001/13315https://periodicos.unb.br/index.php/ripe/article/view/15001/19080Copyright (c) 2017 Revista Interdisciplinar de Pesquisa em Engenharia - RIPEinfo:eu-repo/semantics/openAccessSantos, Ariane Rebelato Silva dosMarczak, Rogério José2019-06-16T15:02:39Zoai:ojs.pkp.sfu.ca:article/15001Revistahttps://periodicos.unb.br/index.php/ripePUBhttps://periodicos.unb.br/index.php/ripe/oaianflor@unb.br2447-61022447-6102opendoar:2019-06-16T15:02:39Revista Interdisciplinar de Pesquisa em Engenharia - Universidade de Brasília (UnB)false
dc.title.none.fl_str_mv A STUDY ON DYNAMIC LOAD HISTORY RECONSTRUCTION USING PSEUDO-INVERSE METHODS
title A STUDY ON DYNAMIC LOAD HISTORY RECONSTRUCTION USING PSEUDO-INVERSE METHODS
spellingShingle A STUDY ON DYNAMIC LOAD HISTORY RECONSTRUCTION USING PSEUDO-INVERSE METHODS
Santos, Ariane Rebelato Silva dos
title_short A STUDY ON DYNAMIC LOAD HISTORY RECONSTRUCTION USING PSEUDO-INVERSE METHODS
title_full A STUDY ON DYNAMIC LOAD HISTORY RECONSTRUCTION USING PSEUDO-INVERSE METHODS
title_fullStr A STUDY ON DYNAMIC LOAD HISTORY RECONSTRUCTION USING PSEUDO-INVERSE METHODS
title_full_unstemmed A STUDY ON DYNAMIC LOAD HISTORY RECONSTRUCTION USING PSEUDO-INVERSE METHODS
title_sort A STUDY ON DYNAMIC LOAD HISTORY RECONSTRUCTION USING PSEUDO-INVERSE METHODS
author Santos, Ariane Rebelato Silva dos
author_facet Santos, Ariane Rebelato Silva dos
Marczak, Rogério José
author_role author
author2 Marczak, Rogério José
author2_role author
dc.contributor.author.fl_str_mv Santos, Ariane Rebelato Silva dos
Marczak, Rogério José
description Considering that the vibratory forces generally cannot be measured directly at the interface of two bodies, an inverse method is studied in the present work to recover the load history in such cases. The proposed technique attempts to reconstruct the dynamic loads history by using a frequency domain analysis and Moore-Penrose pseudo-inverses of the frequency response function (FRF) of the system. The methodology consists in applying discrete dynamic loads on a finite element model in the time domain and retrieve estimates of the loads at points that cannot be measured, and complementing these data with the experimental results. Since the number of points of interest in general differs from the number of points experimentally tested, the FRF matrix results rectangular, then the need of pseudoinverses. Additionally, a regularization procedure is used to smooth the reconstructed load history, aiming the removal of spurious peaks. A case is illustrated to describe the method.Keywords: Load Reconstruction, Pseudo-Inverse, Moore-Penrose Pseudo-Inverse, Structural Dynamics, Load History.
publishDate 2017
dc.date.none.fl_str_mv 2017-02-08
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://periodicos.unb.br/index.php/ripe/article/view/15001
10.26512/ripe.v2i20.15001
url https://periodicos.unb.br/index.php/ripe/article/view/15001
identifier_str_mv 10.26512/ripe.v2i20.15001
dc.language.iso.fl_str_mv por
eng
language por
eng
dc.relation.none.fl_str_mv https://periodicos.unb.br/index.php/ripe/article/view/15001/13315
https://periodicos.unb.br/index.php/ripe/article/view/15001/19080
dc.rights.driver.fl_str_mv Copyright (c) 2017 Revista Interdisciplinar de Pesquisa em Engenharia - RIPE
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2017 Revista Interdisciplinar de Pesquisa em Engenharia - RIPE
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Programa de Pós-Graduação em Integridade de Materiais da Engenharia
publisher.none.fl_str_mv Programa de Pós-Graduação em Integridade de Materiais da Engenharia
dc.source.none.fl_str_mv Revista Interdisciplinar de Pesquisa em Engenharia; Vol. 2 No. 20 (2016): MODELING SIMULATION AND CONTROL OF AEROSPACE AND NAVAL STRUCTURES DYNAMICS (II); 31-36
Revista Interdisciplinar de Pesquisa em Engenharia; v. 2 n. 20 (2016): MODELING SIMULATION AND CONTROL OF AEROSPACE AND NAVAL STRUCTURES DYNAMICS (II); 31-36
2447-6102
reponame:Revista Interdisciplinar de Pesquisa em Engenharia
instname:Universidade de Brasília (UnB)
instacron:UNB
instname_str Universidade de Brasília (UnB)
instacron_str UNB
institution UNB
reponame_str Revista Interdisciplinar de Pesquisa em Engenharia
collection Revista Interdisciplinar de Pesquisa em Engenharia
repository.name.fl_str_mv Revista Interdisciplinar de Pesquisa em Engenharia - Universidade de Brasília (UnB)
repository.mail.fl_str_mv anflor@unb.br
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