Particle packing strategies for modelling granular media
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da Universidade Federal de Alagoas (UFAL) |
Texto Completo: | http://www.repositorio.ufal.br/handle/riufal/6091 |
Resumo: | This work presents strategies for modeling numerical granular media that reproduce characteristics present in real particulate aggregates, such as soils. The presented methodologies have the objective to achieve homogeneous granular models respecting prescribed filling rate and grain size distributions. The strategies can be used by simulators of particulate media to create the initial particle arrangement, such as those used in the Discrete Element Method (DEM). Examples of DEM applications are numerical simulations of fragmentation, fracturing, impact and collision phenomena, as well as those involving soils and rocks as integral media of geomechanical problems. The literature divides techniques for generating particulate media into two categories: geometric and dynamic procedures three alternative methodologies to those present in the literature are explored in this work: i) distance minimization; ii) serial geometric separation technique; and iii) parallel alternative geometric separation technique. The presented approaches deal with geometric procedures starting from an input model with particles in random positions. The overlapping between the particles is eliminated during the proposed methodology procedures, and an output model is delivered. An important contribution of this work is the development of techniques that improve the processing time for modeling using parallel implementation with a focus on GPUs (Graphics Processing Units). Granular models generated from real soil data are presented for validation of the proposed strategies. The results show that the techniques are capable of generating granular models with characteristics close to those of real aggregates. The use of parallel strategies in GPU also presents significant gains, reaching speedups above 200. |
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Particle packing strategies for modelling granular mediaEstratégias de empacotamento de partículas para modelagem de meios granularesModelagem de meios granularesGeração de partículasMétodo dos elementos discretosOtimizaçãoComputação de alto desempenhoGranular Media ModelingParticle GenerationDiscrete Element MethodOptimizationHigh Performace ComputingCNPQ::ENGENHARIAS::ENGENHARIA CIVILThis work presents strategies for modeling numerical granular media that reproduce characteristics present in real particulate aggregates, such as soils. The presented methodologies have the objective to achieve homogeneous granular models respecting prescribed filling rate and grain size distributions. The strategies can be used by simulators of particulate media to create the initial particle arrangement, such as those used in the Discrete Element Method (DEM). Examples of DEM applications are numerical simulations of fragmentation, fracturing, impact and collision phenomena, as well as those involving soils and rocks as integral media of geomechanical problems. The literature divides techniques for generating particulate media into two categories: geometric and dynamic procedures three alternative methodologies to those present in the literature are explored in this work: i) distance minimization; ii) serial geometric separation technique; and iii) parallel alternative geometric separation technique. The presented approaches deal with geometric procedures starting from an input model with particles in random positions. The overlapping between the particles is eliminated during the proposed methodology procedures, and an output model is delivered. An important contribution of this work is the development of techniques that improve the processing time for modeling using parallel implementation with a focus on GPUs (Graphics Processing Units). Granular models generated from real soil data are presented for validation of the proposed strategies. The results show that the techniques are capable of generating granular models with characteristics close to those of real aggregates. The use of parallel strategies in GPU also presents significant gains, reaching speedups above 200.FAPEAL - Fundação de Amparo à Pesquisa do Estado de AlagoasEste trabalho apresenta estratégias para modelagem de meios granulares que mimetizam características presentes em agregados particulados reais, sobretudo solos. Busca-se alcançar modelos granulares homogêneos que respeitem taxas de preenchimento e tamanhos de grãos estabelecidos. As estratégias podem ser utilizadas por simuladores de meios particulados na criação do arranjo inicial dos grãos, como aqueles que utilizam Método dos Elementos Discretos (MED). Simulações numéricas de fenômenos de fragmentação, fraturamento, impacto e colisão, que envolvem solos e rochas como meios integrantes de problemas geomecânicos são exemplos de aplicações do MED. A literatura divide as técnicas de geração de meio particulado em duas categorias: procedimentos geométricos e dinâmicos. Neste trabalho são exploradas três metodologias alternativas às existentes na literatura: i) minimização da distâncias; ii) técnica de separação geométrica serial; e iii) técnica de separação geométrica alternativa paralela. As abordagens apresentadas tratam de procedimentos geométricos a partir de um modelo de entrada com partículas em posições aleatórias. As sobreposições entre as partículas é eliminada durante os procedimentos das metodologias propostas, e um modelo de saída é alcançado. Uma importante contribuição deste trabalho é o desenvolvimento de técnicas que melhoram o tempo de processamento para modelagem utilizando uma implementação paralela com foco nas GPUs (Graphics Processing Units). Modelos granulares gerados a partir de dados reais do solo são apresentados para validação das estratégias propostas. Os resultados mostram que as técnicas são capazes de gerar modelos granulares com características próximas a de agregados reais. A utilização de estratégias paralelas em GPU também apresenta ganhos significativos, alcançando speedups acima de 200.Universidade Federal de AlagoasBrasilPrograma de Pós-Graduação em Engenharia CivilUFALLira, William Wagner Matoshttp://lattes.cnpq.br/2111322410973385Cintra, Diogo Tenóriohttp://lattes.cnpq.br/4855428416881790Peixoto, Hélvio de Farias Costahttp://lattes.cnpq.br/3009384405230104Vieira, Thales Miranda de Almeidahttp://lattes.cnpq.br/8181104476035846Lopes, Lucas Gouveia Omena2019-10-23T15:29:18Z2019-10-232019-10-23T15:29:18Z2019-10-03info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfLOPES, Lucas Gouveia Omena. Particle packing strategies for modelling granular media. 2019. 82 f. Dissertação (Mestrado em Engenharia Civil) – Centro de Tecnologia, Programa de Pós Graduação em Engenharia Civil, Universidade Federal de Alagoas, Maceió, 2019.http://www.repositorio.ufal.br/handle/riufal/6091porinfo:eu-repo/semantics/embargoedAccessreponame:Repositório Institucional da Universidade Federal de Alagoas (UFAL)instname:Universidade Federal de Alagoas (UFAL)instacron:UFAL2019-10-23T15:29:18Zoai:www.repositorio.ufal.br:riufal/6091Repositório InstitucionalPUBhttp://www.repositorio.ufal.br/oai/requestri@sibi.ufal.bropendoar:2019-10-23T15:29:18Repositório Institucional da Universidade Federal de Alagoas (UFAL) - Universidade Federal de Alagoas (UFAL)false |
dc.title.none.fl_str_mv |
Particle packing strategies for modelling granular media Estratégias de empacotamento de partículas para modelagem de meios granulares |
title |
Particle packing strategies for modelling granular media |
spellingShingle |
Particle packing strategies for modelling granular media Lopes, Lucas Gouveia Omena Modelagem de meios granulares Geração de partículas Método dos elementos discretos Otimização Computação de alto desempenho Granular Media Modeling Particle Generation Discrete Element Method Optimization High Performace Computing CNPQ::ENGENHARIAS::ENGENHARIA CIVIL |
title_short |
Particle packing strategies for modelling granular media |
title_full |
Particle packing strategies for modelling granular media |
title_fullStr |
Particle packing strategies for modelling granular media |
title_full_unstemmed |
Particle packing strategies for modelling granular media |
title_sort |
Particle packing strategies for modelling granular media |
author |
Lopes, Lucas Gouveia Omena |
author_facet |
Lopes, Lucas Gouveia Omena |
author_role |
author |
dc.contributor.none.fl_str_mv |
Lira, William Wagner Matos http://lattes.cnpq.br/2111322410973385 Cintra, Diogo Tenório http://lattes.cnpq.br/4855428416881790 Peixoto, Hélvio de Farias Costa http://lattes.cnpq.br/3009384405230104 Vieira, Thales Miranda de Almeida http://lattes.cnpq.br/8181104476035846 |
dc.contributor.author.fl_str_mv |
Lopes, Lucas Gouveia Omena |
dc.subject.por.fl_str_mv |
Modelagem de meios granulares Geração de partículas Método dos elementos discretos Otimização Computação de alto desempenho Granular Media Modeling Particle Generation Discrete Element Method Optimization High Performace Computing CNPQ::ENGENHARIAS::ENGENHARIA CIVIL |
topic |
Modelagem de meios granulares Geração de partículas Método dos elementos discretos Otimização Computação de alto desempenho Granular Media Modeling Particle Generation Discrete Element Method Optimization High Performace Computing CNPQ::ENGENHARIAS::ENGENHARIA CIVIL |
description |
This work presents strategies for modeling numerical granular media that reproduce characteristics present in real particulate aggregates, such as soils. The presented methodologies have the objective to achieve homogeneous granular models respecting prescribed filling rate and grain size distributions. The strategies can be used by simulators of particulate media to create the initial particle arrangement, such as those used in the Discrete Element Method (DEM). Examples of DEM applications are numerical simulations of fragmentation, fracturing, impact and collision phenomena, as well as those involving soils and rocks as integral media of geomechanical problems. The literature divides techniques for generating particulate media into two categories: geometric and dynamic procedures three alternative methodologies to those present in the literature are explored in this work: i) distance minimization; ii) serial geometric separation technique; and iii) parallel alternative geometric separation technique. The presented approaches deal with geometric procedures starting from an input model with particles in random positions. The overlapping between the particles is eliminated during the proposed methodology procedures, and an output model is delivered. An important contribution of this work is the development of techniques that improve the processing time for modeling using parallel implementation with a focus on GPUs (Graphics Processing Units). Granular models generated from real soil data are presented for validation of the proposed strategies. The results show that the techniques are capable of generating granular models with characteristics close to those of real aggregates. The use of parallel strategies in GPU also presents significant gains, reaching speedups above 200. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-23T15:29:18Z 2019-10-23 2019-10-23T15:29:18Z 2019-10-03 |
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 |
LOPES, Lucas Gouveia Omena. Particle packing strategies for modelling granular media. 2019. 82 f. Dissertação (Mestrado em Engenharia Civil) – Centro de Tecnologia, Programa de Pós Graduação em Engenharia Civil, Universidade Federal de Alagoas, Maceió, 2019. http://www.repositorio.ufal.br/handle/riufal/6091 |
identifier_str_mv |
LOPES, Lucas Gouveia Omena. Particle packing strategies for modelling granular media. 2019. 82 f. Dissertação (Mestrado em Engenharia Civil) – Centro de Tecnologia, Programa de Pós Graduação em Engenharia Civil, Universidade Federal de Alagoas, Maceió, 2019. |
url |
http://www.repositorio.ufal.br/handle/riufal/6091 |
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por |
language |
por |
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info:eu-repo/semantics/embargoedAccess |
eu_rights_str_mv |
embargoedAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Alagoas Brasil Programa de Pós-Graduação em Engenharia Civil UFAL |
publisher.none.fl_str_mv |
Universidade Federal de Alagoas Brasil Programa de Pós-Graduação em Engenharia Civil UFAL |
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reponame:Repositório Institucional da Universidade Federal de Alagoas (UFAL) instname:Universidade Federal de Alagoas (UFAL) instacron:UFAL |
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Universidade Federal de Alagoas (UFAL) |
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UFAL |
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UFAL |
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Repositório Institucional da Universidade Federal de Alagoas (UFAL) |
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Repositório Institucional da Universidade Federal de Alagoas (UFAL) |
repository.name.fl_str_mv |
Repositório Institucional da Universidade Federal de Alagoas (UFAL) - Universidade Federal de Alagoas (UFAL) |
repository.mail.fl_str_mv |
ri@sibi.ufal.br |
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