Importance of event detection and nonlinear characterization of dynamical systems with discontinuity boundary
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.2514/6.2021-1499 http://hdl.handle.net/11449/205794 |
Resumo: | In this study, the response of a dynamical system with an increasingly stiff freeplay nonlinearity is investigated. Numerical simulations are carried out on a forced Duffing oscillator with low, intermediate, and hard levels of contact. This study is intended to explore the effects of contact stiffness on the system response as the contact approaches hard impact. The importance of accurately capturing points of contact in the system will also be examined. Preliminary results indicate significant shifts in the frequency-response curves of the system along with reduction in amplitudes. These effects are amplified if the contact is asymmetrically spaced in the system. Further, for soft contact, event detection is not always essential to result accuracy. However, for hard contact, event detection is important to ensure accurate results. Differences with/without event detection range from “poorly converged” appearance to slower transient decay to incorrectly predicting potentially dangerous subharmonic resonances. |
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Repositório Institucional da UNESP |
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spelling |
Importance of event detection and nonlinear characterization of dynamical systems with discontinuity boundaryIn this study, the response of a dynamical system with an increasingly stiff freeplay nonlinearity is investigated. Numerical simulations are carried out on a forced Duffing oscillator with low, intermediate, and hard levels of contact. This study is intended to explore the effects of contact stiffness on the system response as the contact approaches hard impact. The importance of accurately capturing points of contact in the system will also be examined. Preliminary results indicate significant shifts in the frequency-response curves of the system along with reduction in amplitudes. These effects are amplified if the contact is asymmetrically spaced in the system. Further, for soft contact, event detection is not always essential to result accuracy. However, for hard contact, event detection is important to ensure accurate results. Differences with/without event detection range from “poorly converged” appearance to slower transient decay to incorrectly predicting potentially dangerous subharmonic resonances.Sandia National LaboratoriesCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)U.S. Department of EnergyDepartment of Mechanical and Aerospace Engineering New Mexico State UniversitySão Paulo State University (UNESP)Sandia National LaboratoriesSão Paulo State University (UNESP)CAPES: 88881.302889/2018-01U.S. Department of Energy: DE-NA0003525New Mexico State UniversityUniversidade Estadual Paulista (Unesp)Sandia National LaboratoriesSaunders, B. E.Vasconcellos, R. [UNESP]Kuether, R. J.Abdelkefi, A.2021-06-25T10:21:21Z2021-06-25T10:21:21Z2021-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject1-12http://dx.doi.org/10.2514/6.2021-1499AIAA Scitech 2021 Forum, p. 1-12.http://hdl.handle.net/11449/20579410.2514/6.2021-14992-s2.0-85099950029Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAIAA Scitech 2021 Foruminfo:eu-repo/semantics/openAccess2021-10-22T17:27:53Zoai:repositorio.unesp.br:11449/205794Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:26:59.401602Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Importance of event detection and nonlinear characterization of dynamical systems with discontinuity boundary |
title |
Importance of event detection and nonlinear characterization of dynamical systems with discontinuity boundary |
spellingShingle |
Importance of event detection and nonlinear characterization of dynamical systems with discontinuity boundary Saunders, B. E. |
title_short |
Importance of event detection and nonlinear characterization of dynamical systems with discontinuity boundary |
title_full |
Importance of event detection and nonlinear characterization of dynamical systems with discontinuity boundary |
title_fullStr |
Importance of event detection and nonlinear characterization of dynamical systems with discontinuity boundary |
title_full_unstemmed |
Importance of event detection and nonlinear characterization of dynamical systems with discontinuity boundary |
title_sort |
Importance of event detection and nonlinear characterization of dynamical systems with discontinuity boundary |
author |
Saunders, B. E. |
author_facet |
Saunders, B. E. Vasconcellos, R. [UNESP] Kuether, R. J. Abdelkefi, A. |
author_role |
author |
author2 |
Vasconcellos, R. [UNESP] Kuether, R. J. Abdelkefi, A. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
New Mexico State University Universidade Estadual Paulista (Unesp) Sandia National Laboratories |
dc.contributor.author.fl_str_mv |
Saunders, B. E. Vasconcellos, R. [UNESP] Kuether, R. J. Abdelkefi, A. |
description |
In this study, the response of a dynamical system with an increasingly stiff freeplay nonlinearity is investigated. Numerical simulations are carried out on a forced Duffing oscillator with low, intermediate, and hard levels of contact. This study is intended to explore the effects of contact stiffness on the system response as the contact approaches hard impact. The importance of accurately capturing points of contact in the system will also be examined. Preliminary results indicate significant shifts in the frequency-response curves of the system along with reduction in amplitudes. These effects are amplified if the contact is asymmetrically spaced in the system. Further, for soft contact, event detection is not always essential to result accuracy. However, for hard contact, event detection is important to ensure accurate results. Differences with/without event detection range from “poorly converged” appearance to slower transient decay to incorrectly predicting potentially dangerous subharmonic resonances. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T10:21:21Z 2021-06-25T10:21:21Z 2021-01-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.2514/6.2021-1499 AIAA Scitech 2021 Forum, p. 1-12. http://hdl.handle.net/11449/205794 10.2514/6.2021-1499 2-s2.0-85099950029 |
url |
http://dx.doi.org/10.2514/6.2021-1499 http://hdl.handle.net/11449/205794 |
identifier_str_mv |
AIAA Scitech 2021 Forum, p. 1-12. 10.2514/6.2021-1499 2-s2.0-85099950029 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
AIAA Scitech 2021 Forum |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1-12 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808128814086094848 |