Design and test of an adjustable quasi-zero stiffness device and its use to suspend masses on a multi-modal structure
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.ymssp.2020.107354 http://hdl.handle.net/11449/205571 |
Resumo: | In some applications, such as ground vibration testing in the aerospace industry, it is of interest to observe the modal behaviour of a slender structure while it is statically loaded. One way of statically loading such a structure is to suspend masses using very soft springs. If the springs are linear, then this results in an extremely large static deflection of the springs. This problem could be overcome by dynamically isolating the masses using quasi-zero stiffness (QZS) springs. This paper describes the design, construction and experimental testing of a device that can exhibit QZS. A novel design is proposed that allows the stiffness and the symmetry of the device to be adjusted independently using separate adjustment mechanisms. Quasi-static and dynamic testing of the device show that it can be adjusted to have an extremely low stiffness within the limits of measurement. The main trend of the force-displacement curve shows that it has a cubic stiffness characteristic, and that friction is responsible for its hysteretic behaviour. Dynamic testing shows that the device locks-up due to friction at low frequencies, but at high frequencies the device acts as an efficient linear isolator. An experiment was also performed where a mass was suspended on a multi-modal beam structure via the QZS device. It was shown that a static load could be applied to the beam without the attached mass appreciably affecting the dynamic response of the beam, even though the suspended mass was about 12% of that of the host structure. |
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Design and test of an adjustable quasi-zero stiffness device and its use to suspend masses on a multi-modal structureHigh-static-low-dynamic-stiffnessNonlinear vibrationQuasi-zero stiffnessVibration absorberIn some applications, such as ground vibration testing in the aerospace industry, it is of interest to observe the modal behaviour of a slender structure while it is statically loaded. One way of statically loading such a structure is to suspend masses using very soft springs. If the springs are linear, then this results in an extremely large static deflection of the springs. This problem could be overcome by dynamically isolating the masses using quasi-zero stiffness (QZS) springs. This paper describes the design, construction and experimental testing of a device that can exhibit QZS. A novel design is proposed that allows the stiffness and the symmetry of the device to be adjusted independently using separate adjustment mechanisms. Quasi-static and dynamic testing of the device show that it can be adjusted to have an extremely low stiffness within the limits of measurement. The main trend of the force-displacement curve shows that it has a cubic stiffness characteristic, and that friction is responsible for its hysteretic behaviour. Dynamic testing shows that the device locks-up due to friction at low frequencies, but at high frequencies the device acts as an efficient linear isolator. An experiment was also performed where a mass was suspended on a multi-modal beam structure via the QZS device. It was shown that a static load could be applied to the beam without the attached mass appreciably affecting the dynamic response of the beam, even though the suspended mass was about 12% of that of the host structure.College of Engineering Swansea UniversityDepartment of Mechanical Energy and Management Engineering University of CalabriaDepartment of Mechanical Engineering Faculty of Engineering UNESPKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education Dalian University of TechnologyDepartment of Mechanical Engineering Faculty of Engineering UNESPSwansea UniversityUniversity of CalabriaUniversidade Estadual Paulista (Unesp)Dalian University of TechnologyShaw, A. D.Gatti, G.Gonçalves, P. J.P. [UNESP]Tang, B.Brennan, M. J. [UNESP]2021-06-25T10:17:39Z2021-06-25T10:17:39Z2021-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.ymssp.2020.107354Mechanical Systems and Signal Processing, v. 152.1096-12160888-3270http://hdl.handle.net/11449/20557110.1016/j.ymssp.2020.1073542-s2.0-85097332878Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMechanical Systems and Signal Processinginfo:eu-repo/semantics/openAccess2021-10-23T14:54:15Zoai:repositorio.unesp.br:11449/205571Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:05:48.218150Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Design and test of an adjustable quasi-zero stiffness device and its use to suspend masses on a multi-modal structure |
title |
Design and test of an adjustable quasi-zero stiffness device and its use to suspend masses on a multi-modal structure |
spellingShingle |
Design and test of an adjustable quasi-zero stiffness device and its use to suspend masses on a multi-modal structure Shaw, A. D. High-static-low-dynamic-stiffness Nonlinear vibration Quasi-zero stiffness Vibration absorber |
title_short |
Design and test of an adjustable quasi-zero stiffness device and its use to suspend masses on a multi-modal structure |
title_full |
Design and test of an adjustable quasi-zero stiffness device and its use to suspend masses on a multi-modal structure |
title_fullStr |
Design and test of an adjustable quasi-zero stiffness device and its use to suspend masses on a multi-modal structure |
title_full_unstemmed |
Design and test of an adjustable quasi-zero stiffness device and its use to suspend masses on a multi-modal structure |
title_sort |
Design and test of an adjustable quasi-zero stiffness device and its use to suspend masses on a multi-modal structure |
author |
Shaw, A. D. |
author_facet |
Shaw, A. D. Gatti, G. Gonçalves, P. J.P. [UNESP] Tang, B. Brennan, M. J. [UNESP] |
author_role |
author |
author2 |
Gatti, G. Gonçalves, P. J.P. [UNESP] Tang, B. Brennan, M. J. [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Swansea University University of Calabria Universidade Estadual Paulista (Unesp) Dalian University of Technology |
dc.contributor.author.fl_str_mv |
Shaw, A. D. Gatti, G. Gonçalves, P. J.P. [UNESP] Tang, B. Brennan, M. J. [UNESP] |
dc.subject.por.fl_str_mv |
High-static-low-dynamic-stiffness Nonlinear vibration Quasi-zero stiffness Vibration absorber |
topic |
High-static-low-dynamic-stiffness Nonlinear vibration Quasi-zero stiffness Vibration absorber |
description |
In some applications, such as ground vibration testing in the aerospace industry, it is of interest to observe the modal behaviour of a slender structure while it is statically loaded. One way of statically loading such a structure is to suspend masses using very soft springs. If the springs are linear, then this results in an extremely large static deflection of the springs. This problem could be overcome by dynamically isolating the masses using quasi-zero stiffness (QZS) springs. This paper describes the design, construction and experimental testing of a device that can exhibit QZS. A novel design is proposed that allows the stiffness and the symmetry of the device to be adjusted independently using separate adjustment mechanisms. Quasi-static and dynamic testing of the device show that it can be adjusted to have an extremely low stiffness within the limits of measurement. The main trend of the force-displacement curve shows that it has a cubic stiffness characteristic, and that friction is responsible for its hysteretic behaviour. Dynamic testing shows that the device locks-up due to friction at low frequencies, but at high frequencies the device acts as an efficient linear isolator. An experiment was also performed where a mass was suspended on a multi-modal beam structure via the QZS device. It was shown that a static load could be applied to the beam without the attached mass appreciably affecting the dynamic response of the beam, even though the suspended mass was about 12% of that of the host structure. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T10:17:39Z 2021-06-25T10:17:39Z 2021-05-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.ymssp.2020.107354 Mechanical Systems and Signal Processing, v. 152. 1096-1216 0888-3270 http://hdl.handle.net/11449/205571 10.1016/j.ymssp.2020.107354 2-s2.0-85097332878 |
url |
http://dx.doi.org/10.1016/j.ymssp.2020.107354 http://hdl.handle.net/11449/205571 |
identifier_str_mv |
Mechanical Systems and Signal Processing, v. 152. 1096-1216 0888-3270 10.1016/j.ymssp.2020.107354 2-s2.0-85097332878 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Mechanical Systems and Signal Processing |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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 |
|
_version_ |
1808128459396874240 |