Minimax approach applied to topology optimization of structures subjected to multiple load cases
| Autor(a) principal: | |
|---|---|
| Data de Publicação: | 2013 |
| Tipo de documento: | Dissertação |
| Idioma: | eng |
| Título da fonte: | Biblioteca Digital de Teses e Dissertações do ITA |
| Texto Completo: | http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=2834 |
Resumo: | This work investigates a topology optimization strategy for structures under multiple load cases. Typically compliance is calculated for each of the load cases in analysis and minimization is computed for a weighted average of the compliances, resulting in time consuming algorithms. A way to increase convergence speed is updating density on the element level. Instead of having an averaged compliance for the whole structure, it is proposed to compute it individually for every element. All load cases are analyzed, however only the ones of the maximum compliances are considered for sensitivity analysis. Thus compliance gradient is function of a few load cases at each element, reducing the processing time without significant weight penalty. The efficiency of the proposed technique is exemplified and compared to the one of a classical approach of multiple load case problem, solved using optimality criteria. |
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Biblioteca Digital de Teses e Dissertações do ITA |
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Minimax approach applied to topology optimization of structures subjected to multiple load casesTopologiaOtimizaçãoEstruturasMatemáticaEngenharia estruturalThis work investigates a topology optimization strategy for structures under multiple load cases. Typically compliance is calculated for each of the load cases in analysis and minimization is computed for a weighted average of the compliances, resulting in time consuming algorithms. A way to increase convergence speed is updating density on the element level. Instead of having an averaged compliance for the whole structure, it is proposed to compute it individually for every element. All load cases are analyzed, however only the ones of the maximum compliances are considered for sensitivity analysis. Thus compliance gradient is function of a few load cases at each element, reducing the processing time without significant weight penalty. The efficiency of the proposed technique is exemplified and compared to the one of a classical approach of multiple load case problem, solved using optimality criteria.Instituto Tecnológico de AeronáuticaAlfredo Rocha de FariaRafael Santos Iwamura2013-11-25info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesishttp://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=2834reponame:Biblioteca Digital de Teses e Dissertações do ITAinstname:Instituto Tecnológico de Aeronáuticainstacron:ITAenginfo:eu-repo/semantics/openAccessapplication/pdf2019-02-02T14:04:59Zoai:agregador.ibict.br.BDTD_ITA:oai:ita.br:2834http://oai.bdtd.ibict.br/requestopendoar:null2020-05-28 19:40:10.602Biblioteca Digital de Teses e Dissertações do ITA - Instituto Tecnológico de Aeronáuticatrue |
| dc.title.none.fl_str_mv |
Minimax approach applied to topology optimization of structures subjected to multiple load cases |
| title |
Minimax approach applied to topology optimization of structures subjected to multiple load cases |
| spellingShingle |
Minimax approach applied to topology optimization of structures subjected to multiple load cases Rafael Santos Iwamura Topologia Otimização Estruturas Matemática Engenharia estrutural |
| title_short |
Minimax approach applied to topology optimization of structures subjected to multiple load cases |
| title_full |
Minimax approach applied to topology optimization of structures subjected to multiple load cases |
| title_fullStr |
Minimax approach applied to topology optimization of structures subjected to multiple load cases |
| title_full_unstemmed |
Minimax approach applied to topology optimization of structures subjected to multiple load cases |
| title_sort |
Minimax approach applied to topology optimization of structures subjected to multiple load cases |
| author |
Rafael Santos Iwamura |
| author_facet |
Rafael Santos Iwamura |
| author_role |
author |
| dc.contributor.none.fl_str_mv |
Alfredo Rocha de Faria |
| dc.contributor.author.fl_str_mv |
Rafael Santos Iwamura |
| dc.subject.por.fl_str_mv |
Topologia Otimização Estruturas Matemática Engenharia estrutural |
| topic |
Topologia Otimização Estruturas Matemática Engenharia estrutural |
| dc.description.none.fl_txt_mv |
This work investigates a topology optimization strategy for structures under multiple load cases. Typically compliance is calculated for each of the load cases in analysis and minimization is computed for a weighted average of the compliances, resulting in time consuming algorithms. A way to increase convergence speed is updating density on the element level. Instead of having an averaged compliance for the whole structure, it is proposed to compute it individually for every element. All load cases are analyzed, however only the ones of the maximum compliances are considered for sensitivity analysis. Thus compliance gradient is function of a few load cases at each element, reducing the processing time without significant weight penalty. The efficiency of the proposed technique is exemplified and compared to the one of a classical approach of multiple load case problem, solved using optimality criteria. |
| description |
This work investigates a topology optimization strategy for structures under multiple load cases. Typically compliance is calculated for each of the load cases in analysis and minimization is computed for a weighted average of the compliances, resulting in time consuming algorithms. A way to increase convergence speed is updating density on the element level. Instead of having an averaged compliance for the whole structure, it is proposed to compute it individually for every element. All load cases are analyzed, however only the ones of the maximum compliances are considered for sensitivity analysis. Thus compliance gradient is function of a few load cases at each element, reducing the processing time without significant weight penalty. The efficiency of the proposed technique is exemplified and compared to the one of a classical approach of multiple load case problem, solved using optimality criteria. |
| publishDate |
2013 |
| dc.date.none.fl_str_mv |
2013-11-25 |
| dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/masterThesis |
| status_str |
publishedVersion |
| format |
masterThesis |
| dc.identifier.uri.fl_str_mv |
http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=2834 |
| url |
http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=2834 |
| dc.language.iso.fl_str_mv |
eng |
| language |
eng |
| dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
application/pdf |
| dc.publisher.none.fl_str_mv |
Instituto Tecnológico de Aeronáutica |
| publisher.none.fl_str_mv |
Instituto Tecnológico de Aeronáutica |
| dc.source.none.fl_str_mv |
reponame:Biblioteca Digital de Teses e Dissertações do ITA instname:Instituto Tecnológico de Aeronáutica instacron:ITA |
| reponame_str |
Biblioteca Digital de Teses e Dissertações do ITA |
| collection |
Biblioteca Digital de Teses e Dissertações do ITA |
| instname_str |
Instituto Tecnológico de Aeronáutica |
| instacron_str |
ITA |
| institution |
ITA |
| repository.name.fl_str_mv |
Biblioteca Digital de Teses e Dissertações do ITA - Instituto Tecnológico de Aeronáutica |
| repository.mail.fl_str_mv |
|
| subject_por_txtF_mv |
Topologia Otimização Estruturas Matemática Engenharia estrutural |
| _version_ |
1706809291663474688 |