Damage of hydroelectric power plant trash-racks due to fluid-dynamic exciting frequencies

Detalhes bibliográficos
Autor(a) principal: Nascimento, L. P. [UNESP]
Data de Publicação: 2006
Outros Autores: Silva, J. B.C. [UNESP], Di Giunta, V. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://hdl.handle.net/11449/226676
Resumo: This work is concerned with damages of trash-racks of hydroelectric power plants excited by the flow passing around them, and with the analysis of virtual mass effect on the natural frequencies and mode shapes of the trash-racks. A model for simulation of the flow passing through a big trash-rack regarding the effect of its obstruction due to aquatic plants accumulation is presented. The vortex shedding frequencies has been determined for several operating conditions. A finite element model has also been developed for analysis of the modal characteristics of the trash-rack. The fluid-structure interaction effect or hydroelastic vibration structure has been included in this model and the modal characteristics have been determined regarding the structure immersed in water and in air. Furthermore, the natural frequencies and vortex shedding frequency approaches have indicated that the trash-rack damages are probably due to operating at resonant conditions.
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spelling Damage of hydroelectric power plant trash-racks due to fluid-dynamic exciting frequenciesFlow simulationFluid-structureHydroelectric machineModelingTrash-rackThis work is concerned with damages of trash-racks of hydroelectric power plants excited by the flow passing around them, and with the analysis of virtual mass effect on the natural frequencies and mode shapes of the trash-racks. A model for simulation of the flow passing through a big trash-rack regarding the effect of its obstruction due to aquatic plants accumulation is presented. The vortex shedding frequencies has been determined for several operating conditions. A finite element model has also been developed for analysis of the modal characteristics of the trash-rack. The fluid-structure interaction effect or hydroelastic vibration structure has been included in this model and the modal characteristics have been determined regarding the structure immersed in water and in air. Furthermore, the natural frequencies and vortex shedding frequency approaches have indicated that the trash-rack damages are probably due to operating at resonant conditions.Department of Mechanical Engineering São Paulo State University - UNESP, Campus de Ilha Solteira, SPDepartment of Mechanical Engineering São Paulo State University - UNESP, Campus de Ilha Solteira, SPUniversidade Estadual Paulista (UNESP)Nascimento, L. P. [UNESP]Silva, J. B.C. [UNESP]Di Giunta, V. [UNESP]2022-04-29T02:43:10Z2022-04-29T02:43:10Z2006-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article223-243Latin American Journal of Solids and Structures, v. 3, n. 3, p. 223-243, 2006.1679-78251679-7817http://hdl.handle.net/11449/2266762-s2.0-84855784405Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengLatin American Journal of Solids and Structuresinfo:eu-repo/semantics/openAccess2024-07-04T20:06:16Zoai:repositorio.unesp.br:11449/226676Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:05:21.284357Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Damage of hydroelectric power plant trash-racks due to fluid-dynamic exciting frequencies
title Damage of hydroelectric power plant trash-racks due to fluid-dynamic exciting frequencies
spellingShingle Damage of hydroelectric power plant trash-racks due to fluid-dynamic exciting frequencies
Nascimento, L. P. [UNESP]
Flow simulation
Fluid-structure
Hydroelectric machine
Modeling
Trash-rack
title_short Damage of hydroelectric power plant trash-racks due to fluid-dynamic exciting frequencies
title_full Damage of hydroelectric power plant trash-racks due to fluid-dynamic exciting frequencies
title_fullStr Damage of hydroelectric power plant trash-racks due to fluid-dynamic exciting frequencies
title_full_unstemmed Damage of hydroelectric power plant trash-racks due to fluid-dynamic exciting frequencies
title_sort Damage of hydroelectric power plant trash-racks due to fluid-dynamic exciting frequencies
author Nascimento, L. P. [UNESP]
author_facet Nascimento, L. P. [UNESP]
Silva, J. B.C. [UNESP]
Di Giunta, V. [UNESP]
author_role author
author2 Silva, J. B.C. [UNESP]
Di Giunta, V. [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
dc.contributor.author.fl_str_mv Nascimento, L. P. [UNESP]
Silva, J. B.C. [UNESP]
Di Giunta, V. [UNESP]
dc.subject.por.fl_str_mv Flow simulation
Fluid-structure
Hydroelectric machine
Modeling
Trash-rack
topic Flow simulation
Fluid-structure
Hydroelectric machine
Modeling
Trash-rack
description This work is concerned with damages of trash-racks of hydroelectric power plants excited by the flow passing around them, and with the analysis of virtual mass effect on the natural frequencies and mode shapes of the trash-racks. A model for simulation of the flow passing through a big trash-rack regarding the effect of its obstruction due to aquatic plants accumulation is presented. The vortex shedding frequencies has been determined for several operating conditions. A finite element model has also been developed for analysis of the modal characteristics of the trash-rack. The fluid-structure interaction effect or hydroelastic vibration structure has been included in this model and the modal characteristics have been determined regarding the structure immersed in water and in air. Furthermore, the natural frequencies and vortex shedding frequency approaches have indicated that the trash-rack damages are probably due to operating at resonant conditions.
publishDate 2006
dc.date.none.fl_str_mv 2006-01-01
2022-04-29T02:43:10Z
2022-04-29T02:43:10Z
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 Latin American Journal of Solids and Structures, v. 3, n. 3, p. 223-243, 2006.
1679-7825
1679-7817
http://hdl.handle.net/11449/226676
2-s2.0-84855784405
identifier_str_mv Latin American Journal of Solids and Structures, v. 3, n. 3, p. 223-243, 2006.
1679-7825
1679-7817
2-s2.0-84855784405
url http://hdl.handle.net/11449/226676
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Latin American Journal of Solids and Structures
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 223-243
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_ 1808129283069050880

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