A rigid body and a master-master contact formulation for multibody railway applications.
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Biblioteca Digital de Teses e Dissertações da USP |
Texto Completo: | http://www.teses.usp.br/teses/disponiveis/3/3144/tde-01112018-150928/ |
Resumo: | In computer simulation the term \"multibody system\" is usually employed to describe a system of interconnected bodies. Several examples of multibody systems can be found in railway engineering. A wheelset interacting with a track through a contact interface is just one example of practical interest. Modelling mechanical systems in a virtual environment contributes to the understanding of subjects such as dynamic behaviour, stability, durability, wear, fatigue, etc. In the context of a rigid-flexible multibody system mathematically described by a weak-form, the purpose of the present work is to evaluate the contributions due to rigid bodies considering their contact interactions. Inertial contributions due to distribution of mass of a rigid body are fully developed, considering a general pole position associated with a single node, representing a rigid body element. Rodrigues rotation parameters are used to describe finite rotations, by an updated Lagrangian description. Then, the so-called master-surface to master-surface contact formulation is adapted to be used in conjunction with the rigid body element and flexible bodies, aiming to consider their interaction in a rigid-flexible multibody environment. New surface parameterizations are proposed to establish contact pairs, permitting pointwise interaction in a frictional scenario. The proposed formulation is used to represent mechanical systems from different contexts, including a numerical example of the wheel-rail contact interface. The obtained results show the robustness and applicability of the methods. |
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A rigid body and a master-master contact formulation for multibody railway applications.Uma formulação de corpo rígido e contato master-master para aplicações ferroviárias multicorpos.ContactContatoDinâmica das estruturasMaster-masterMaster-masterMultibody systemsRoda-trilhoSistemas mecânicosSistemas multicorposWheel-railIn computer simulation the term \"multibody system\" is usually employed to describe a system of interconnected bodies. Several examples of multibody systems can be found in railway engineering. A wheelset interacting with a track through a contact interface is just one example of practical interest. Modelling mechanical systems in a virtual environment contributes to the understanding of subjects such as dynamic behaviour, stability, durability, wear, fatigue, etc. In the context of a rigid-flexible multibody system mathematically described by a weak-form, the purpose of the present work is to evaluate the contributions due to rigid bodies considering their contact interactions. Inertial contributions due to distribution of mass of a rigid body are fully developed, considering a general pole position associated with a single node, representing a rigid body element. Rodrigues rotation parameters are used to describe finite rotations, by an updated Lagrangian description. Then, the so-called master-surface to master-surface contact formulation is adapted to be used in conjunction with the rigid body element and flexible bodies, aiming to consider their interaction in a rigid-flexible multibody environment. New surface parameterizations are proposed to establish contact pairs, permitting pointwise interaction in a frictional scenario. The proposed formulation is used to represent mechanical systems from different contexts, including a numerical example of the wheel-rail contact interface. The obtained results show the robustness and applicability of the methods.Em simulação computacional o termo \"sistema multicorpos\" é usualmente empregado para descrever um sistema de corpos interconectados. Diversos exemplos de sistemas multicorpos podem ser encontrados no campo da engenharia ferroviária. Um rodeiro interagindo com a via através de uma interface de contato é apenas um dos exemplos de interesse prático. A modelagem de sistemas mecânicos em um ambiente virtual contribui para o entendimento de assuntos como comportamento dinâmico, estabilidade, durabilidade, desgaste, fadiga, etc. No contexto de um sistema multicorpos rígido-flexível descrito matematicamente por uma forma fraca, o propósito do presente trabalho é avaliar as contribuições devido à presença de corpos rígidos considerando interações de contato. Contribuições inerciais devido à distribuição de massa do corpo rígido são desenvolvidas e apresentadas em totalidade, considerando um polo genérico associado a um único nó, representando o corpo rígido. Parâmetros de rotação de Rodrigues são usados para descrever rotações finitas em uma descrição Lagrangiana atualizada. A formulação de contato master-surface to master-surface é adaptada para ser usada em conjunto com o elemento de corpo rígido e corpos flexíveis, estabelecendo a interação entre esses corpos em um ambiente de simulação multicorpos. Novas parametrizações de superfícies de contato são desenvolvidas para estabelecer os pares de contato, assumindo-se interações pontuais, em um cenário de contato com atrito. A formulação proposta é usada para representar sistemas mecânicos em diferentes contextos, incluindo um exemplo numérico do caso de contato roda-trilho. Os resultados obtidos mostram a robustez e a aplicabilidade dos métodos.Biblioteca Digitais de Teses e Dissertações da USPGay Neto, AlfredoRefachinho de Campos, Paulo Roberto2018-09-13info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://www.teses.usp.br/teses/disponiveis/3/3144/tde-01112018-150928/reponame:Biblioteca Digital de Teses e Dissertações da USPinstname:Universidade de São Paulo (USP)instacron:USPLiberar o conteúdo para acesso público.info:eu-repo/semantics/openAccesseng2019-04-10T00:06:19Zoai:teses.usp.br:tde-01112018-150928Biblioteca Digital de Teses e Dissertaçõeshttp://www.teses.usp.br/PUBhttp://www.teses.usp.br/cgi-bin/mtd2br.plvirginia@if.usp.br|| atendimento@aguia.usp.br||virginia@if.usp.bropendoar:27212019-04-10T00:06:19Biblioteca Digital de Teses e Dissertações da USP - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
A rigid body and a master-master contact formulation for multibody railway applications. Uma formulação de corpo rígido e contato master-master para aplicações ferroviárias multicorpos. |
title |
A rigid body and a master-master contact formulation for multibody railway applications. |
spellingShingle |
A rigid body and a master-master contact formulation for multibody railway applications. Refachinho de Campos, Paulo Roberto Contact Contato Dinâmica das estruturas Master-master Master-master Multibody systems Roda-trilho Sistemas mecânicos Sistemas multicorpos Wheel-rail |
title_short |
A rigid body and a master-master contact formulation for multibody railway applications. |
title_full |
A rigid body and a master-master contact formulation for multibody railway applications. |
title_fullStr |
A rigid body and a master-master contact formulation for multibody railway applications. |
title_full_unstemmed |
A rigid body and a master-master contact formulation for multibody railway applications. |
title_sort |
A rigid body and a master-master contact formulation for multibody railway applications. |
author |
Refachinho de Campos, Paulo Roberto |
author_facet |
Refachinho de Campos, Paulo Roberto |
author_role |
author |
dc.contributor.none.fl_str_mv |
Gay Neto, Alfredo |
dc.contributor.author.fl_str_mv |
Refachinho de Campos, Paulo Roberto |
dc.subject.por.fl_str_mv |
Contact Contato Dinâmica das estruturas Master-master Master-master Multibody systems Roda-trilho Sistemas mecânicos Sistemas multicorpos Wheel-rail |
topic |
Contact Contato Dinâmica das estruturas Master-master Master-master Multibody systems Roda-trilho Sistemas mecânicos Sistemas multicorpos Wheel-rail |
description |
In computer simulation the term \"multibody system\" is usually employed to describe a system of interconnected bodies. Several examples of multibody systems can be found in railway engineering. A wheelset interacting with a track through a contact interface is just one example of practical interest. Modelling mechanical systems in a virtual environment contributes to the understanding of subjects such as dynamic behaviour, stability, durability, wear, fatigue, etc. In the context of a rigid-flexible multibody system mathematically described by a weak-form, the purpose of the present work is to evaluate the contributions due to rigid bodies considering their contact interactions. Inertial contributions due to distribution of mass of a rigid body are fully developed, considering a general pole position associated with a single node, representing a rigid body element. Rodrigues rotation parameters are used to describe finite rotations, by an updated Lagrangian description. Then, the so-called master-surface to master-surface contact formulation is adapted to be used in conjunction with the rigid body element and flexible bodies, aiming to consider their interaction in a rigid-flexible multibody environment. New surface parameterizations are proposed to establish contact pairs, permitting pointwise interaction in a frictional scenario. The proposed formulation is used to represent mechanical systems from different contexts, including a numerical example of the wheel-rail contact interface. The obtained results show the robustness and applicability of the methods. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-09-13 |
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 |
http://www.teses.usp.br/teses/disponiveis/3/3144/tde-01112018-150928/ |
url |
http://www.teses.usp.br/teses/disponiveis/3/3144/tde-01112018-150928/ |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
|
dc.rights.driver.fl_str_mv |
Liberar o conteúdo para acesso público. info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Liberar o conteúdo para acesso público. |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.coverage.none.fl_str_mv |
|
dc.publisher.none.fl_str_mv |
Biblioteca Digitais de Teses e Dissertações da USP |
publisher.none.fl_str_mv |
Biblioteca Digitais de Teses e Dissertações da USP |
dc.source.none.fl_str_mv |
reponame:Biblioteca Digital de Teses e Dissertações da USP instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Biblioteca Digital de Teses e Dissertações da USP |
collection |
Biblioteca Digital de Teses e Dissertações da USP |
repository.name.fl_str_mv |
Biblioteca Digital de Teses e Dissertações da USP - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
virginia@if.usp.br|| atendimento@aguia.usp.br||virginia@if.usp.br |
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1815256592113729536 |