Análise dinâmica de torres estaiadas de linhas de transmissão submetidas à ruptura de cabo
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/7874 |
Resumo: | The need for transmission lines expansion (TL) is evident in the face of growing electrical energy demand in Brazil as well as the great distances between generation and consumption centers. It is known that numerous failures can interrupt the energy transmission and the towers collapse is among the main reasons, causing huge losses to both electrical energy companies and final users. Thus, it is crucial to understand the mechanical behavior of these structures, considering the different actions that they can act so that the energy transmission can take place in a safe, efficient and economical way. In this context, this paper deals with the static and dynamic response evaluation of guyed lattice metallic towers of TLs submitted to broken conductor and broken lightning-rod cable. For this purpose, numerical models of isolated tower and completed stretch of TL were developed, including all components, towers, insulator chains, lightning-rod cables, conductor cables and prestressed stay cables. The models are subjected to static analysis through "equivalent static loads" application coming from the broken cable and dynamic analysis, in the time domain, using the method of direct integration of equations of motion explicitly, with central finite differences. The static and dynamic responses are given in terms of nodal displacements at the top and normal stresses in the tower bars. Finally, the results of the dynamic analysis in the time domain are compared with those determined by static analysis, employed in the usual design practice, that is, the peak and final values (after the structure stops vibrating) are compared with the static response values in order to verify the validity of the model used in the design practice. |
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Análise dinâmica de torres estaiadas de linhas de transmissão submetidas à ruptura de caboDinamic analysis of transmission lines guyed towers submitted to broken cableTorres de linhas de transmissãoTorres metálicas treliçadas estaiadasRuptura de caboAnálise modalMétodo de integração diretaDiferenças finitas centraisTransmission lines towerGuyed lattice metallic towersCable breakModal analysisDirect integration methodCentral finite differencesCNPQ::ENGENHARIAS::ENGENHARIA CIVILThe need for transmission lines expansion (TL) is evident in the face of growing electrical energy demand in Brazil as well as the great distances between generation and consumption centers. It is known that numerous failures can interrupt the energy transmission and the towers collapse is among the main reasons, causing huge losses to both electrical energy companies and final users. Thus, it is crucial to understand the mechanical behavior of these structures, considering the different actions that they can act so that the energy transmission can take place in a safe, efficient and economical way. In this context, this paper deals with the static and dynamic response evaluation of guyed lattice metallic towers of TLs submitted to broken conductor and broken lightning-rod cable. For this purpose, numerical models of isolated tower and completed stretch of TL were developed, including all components, towers, insulator chains, lightning-rod cables, conductor cables and prestressed stay cables. The models are subjected to static analysis through "equivalent static loads" application coming from the broken cable and dynamic analysis, in the time domain, using the method of direct integration of equations of motion explicitly, with central finite differences. The static and dynamic responses are given in terms of nodal displacements at the top and normal stresses in the tower bars. Finally, the results of the dynamic analysis in the time domain are compared with those determined by static analysis, employed in the usual design practice, that is, the peak and final values (after the structure stops vibrating) are compared with the static response values in order to verify the validity of the model used in the design practice.Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorA necessidade da expansão de linhas de transmissão (LTs) fica evidente diante da crescente demanda por energia elétrica no Brasil, além das grandes distâncias entre a geração e os centros consumidores. Sabe-se que inúmeras falhas podem interromper a transmissão da energia, e o colapso de torres está entre as principais, causando enormes prejuízos, tanto as companhias de energia elétrica quanto aos consumidores finais. Dessa forma, torna-se fundamental o conhecimento do comportamento mecânico destas estruturas, frente às diferentes ações que podem atuar, para que o transporte de energia ocorra de maneira segura, eficiente e econômica. Neste contexto, o presente trabalho trata da avaliação da resposta estática e dinâmica de torres metálicas treliçadas estaiadas de LTs submetidas à ruptura de cabo condutor e de cabo para-raios. Para isso, foram desenvolvidos modelos numéricos de torre isolada e de um trecho completo de LT, incluindo todos componentes, torres, cadeias de isoladores, cabos para-raios, cabos condutores e cabos de estais pré-tensionados. Os modelos são submetidos a análises estáticas, através da aplicação de cargas estáticas equivalentes oriundas da ruptura de cabo, e análises dinâmicas, no domínio do tempo, empregando o método de integração direta das equações do movimento, de forma explícita, com diferenças finitas centrais. As respostas estática e dinâmica são dadas em termos de deslocamentos nodais no topo e esforços normais nas barras da torre. Por fim, os resultados da análise dinâmica no domínio do tempo são comparados com os determinados por meio da análise estática, empregada na prática usual de projeto, ou seja, são comparados os valores de pico e os valores finais (após a estrutura parar de vibrar) com os valores da resposta estática, a fim de verificar a validade do modelo empregado na prática de projeto.Universidade Federal de Santa MariaBREngenharia CivilUFSMPrograma de Pós-Graduação em Engenharia CivilKaminski Junior, Joãohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4723786A6Pinheiro, Marco Antônio Silvahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4796909Y2Miguel, Leandro Fleck Fadelhttp://lattes.cnpq.br/8608259378915566Carlos, Thiago Brazeiro2015-05-222015-05-222015-02-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfapplication/pdfCARLOS, Thiago Brazeiro. DINAMIC ANALYSIS OF TRANSMISSION LINES GUYED TOWERS SUBMITTED TO BROKEN CABLE. 2015. 218 f. Dissertação (Mestrado em Engenharia Civil) - Universidade Federal de Santa Maria, Santa Maria, 2015.http://repositorio.ufsm.br/handle/1/7874porinfo:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2020-08-26T12:49:58Zoai:repositorio.ufsm.br:1/7874Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2020-08-26T12:49:58Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
Análise dinâmica de torres estaiadas de linhas de transmissão submetidas à ruptura de cabo Dinamic analysis of transmission lines guyed towers submitted to broken cable |
title |
Análise dinâmica de torres estaiadas de linhas de transmissão submetidas à ruptura de cabo |
spellingShingle |
Análise dinâmica de torres estaiadas de linhas de transmissão submetidas à ruptura de cabo Carlos, Thiago Brazeiro Torres de linhas de transmissão Torres metálicas treliçadas estaiadas Ruptura de cabo Análise modal Método de integração direta Diferenças finitas centrais Transmission lines tower Guyed lattice metallic towers Cable break Modal analysis Direct integration method Central finite differences CNPQ::ENGENHARIAS::ENGENHARIA CIVIL |
title_short |
Análise dinâmica de torres estaiadas de linhas de transmissão submetidas à ruptura de cabo |
title_full |
Análise dinâmica de torres estaiadas de linhas de transmissão submetidas à ruptura de cabo |
title_fullStr |
Análise dinâmica de torres estaiadas de linhas de transmissão submetidas à ruptura de cabo |
title_full_unstemmed |
Análise dinâmica de torres estaiadas de linhas de transmissão submetidas à ruptura de cabo |
title_sort |
Análise dinâmica de torres estaiadas de linhas de transmissão submetidas à ruptura de cabo |
author |
Carlos, Thiago Brazeiro |
author_facet |
Carlos, Thiago Brazeiro |
author_role |
author |
dc.contributor.none.fl_str_mv |
Kaminski Junior, João http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4723786A6 Pinheiro, Marco Antônio Silva http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4796909Y2 Miguel, Leandro Fleck Fadel http://lattes.cnpq.br/8608259378915566 |
dc.contributor.author.fl_str_mv |
Carlos, Thiago Brazeiro |
dc.subject.por.fl_str_mv |
Torres de linhas de transmissão Torres metálicas treliçadas estaiadas Ruptura de cabo Análise modal Método de integração direta Diferenças finitas centrais Transmission lines tower Guyed lattice metallic towers Cable break Modal analysis Direct integration method Central finite differences CNPQ::ENGENHARIAS::ENGENHARIA CIVIL |
topic |
Torres de linhas de transmissão Torres metálicas treliçadas estaiadas Ruptura de cabo Análise modal Método de integração direta Diferenças finitas centrais Transmission lines tower Guyed lattice metallic towers Cable break Modal analysis Direct integration method Central finite differences CNPQ::ENGENHARIAS::ENGENHARIA CIVIL |
description |
The need for transmission lines expansion (TL) is evident in the face of growing electrical energy demand in Brazil as well as the great distances between generation and consumption centers. It is known that numerous failures can interrupt the energy transmission and the towers collapse is among the main reasons, causing huge losses to both electrical energy companies and final users. Thus, it is crucial to understand the mechanical behavior of these structures, considering the different actions that they can act so that the energy transmission can take place in a safe, efficient and economical way. In this context, this paper deals with the static and dynamic response evaluation of guyed lattice metallic towers of TLs submitted to broken conductor and broken lightning-rod cable. For this purpose, numerical models of isolated tower and completed stretch of TL were developed, including all components, towers, insulator chains, lightning-rod cables, conductor cables and prestressed stay cables. The models are subjected to static analysis through "equivalent static loads" application coming from the broken cable and dynamic analysis, in the time domain, using the method of direct integration of equations of motion explicitly, with central finite differences. The static and dynamic responses are given in terms of nodal displacements at the top and normal stresses in the tower bars. Finally, the results of the dynamic analysis in the time domain are compared with those determined by static analysis, employed in the usual design practice, that is, the peak and final values (after the structure stops vibrating) are compared with the static response values in order to verify the validity of the model used in the design practice. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-05-22 2015-05-22 2015-02-10 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
CARLOS, Thiago Brazeiro. DINAMIC ANALYSIS OF TRANSMISSION LINES GUYED TOWERS SUBMITTED TO BROKEN CABLE. 2015. 218 f. Dissertação (Mestrado em Engenharia Civil) - Universidade Federal de Santa Maria, Santa Maria, 2015. http://repositorio.ufsm.br/handle/1/7874 |
identifier_str_mv |
CARLOS, Thiago Brazeiro. DINAMIC ANALYSIS OF TRANSMISSION LINES GUYED TOWERS SUBMITTED TO BROKEN CABLE. 2015. 218 f. Dissertação (Mestrado em Engenharia Civil) - Universidade Federal de Santa Maria, Santa Maria, 2015. |
url |
http://repositorio.ufsm.br/handle/1/7874 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria BR Engenharia Civil UFSM Programa de Pós-Graduação em Engenharia Civil |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria BR Engenharia Civil UFSM Programa de Pós-Graduação em Engenharia Civil |
dc.source.none.fl_str_mv |
reponame:Manancial - Repositório Digital da UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Manancial - Repositório Digital da UFSM |
collection |
Manancial - Repositório Digital da UFSM |
repository.name.fl_str_mv |
Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
atendimento.sib@ufsm.br||tedebc@gmail.com |
_version_ |
1805922117744590848 |