Estudio numérico de la propagación de ondas guiadas en rieles ferroviarios

Detalhes bibliográficos
Ano de defesa: 2017
Autor(a) principal: Idzi, Javier Luis
Orientador(a): Iturrioz, Ignacio
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: spa
Instituição de defesa: Não Informado pela instituição
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Propagação de ondas
Trilhos ferroviários
Ensaios não-destrutivos
Palavras-chave em Inglês:
Dispersion curves
Guided waves
Nondestructive testing
Rail
Link de acesso: http://hdl.handle.net/10183/172119
Resumo: In recent decades techniques related to the measurement of elastic waves have advanced significantly. It is now possible with relatively inexpensive equipment to record amplitudes and frequency bands that were unthinkable two decades ago. This has led to the development of theoretical topics which application was questionable until not long ago, to profit from new technological potential in obtaining more and better experimental information. In this context the study of the propagation of guided waves in solids is presented as a knowledge that allows to detect damage with efficiency and economy in a number of structures in which at least one dimension is much larger than the other two. This is the case for rails, tubulations and pressure vessels among others. In this work, guided waves propagation characteristics are studied, first in a prismatic bar and then within the geometry of a rail. In both cases, dispersion curves were computed according two different work methodologies, first using an axisymmetric model and then corroborated with a model of periodic conditions. Finally propagation of a Tone-Burst waves were simulated on the analyzed geometries, leading to the discussion of how the waves scatter along its propagation. The results obtained were the dispersion curves of both sections.
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spelling Idzi, Javier LuisIturrioz, Ignacio2018-01-23T02:24:19Z2017http://hdl.handle.net/10183/172119001055611In recent decades techniques related to the measurement of elastic waves have advanced significantly. It is now possible with relatively inexpensive equipment to record amplitudes and frequency bands that were unthinkable two decades ago. This has led to the development of theoretical topics which application was questionable until not long ago, to profit from new technological potential in obtaining more and better experimental information. In this context the study of the propagation of guided waves in solids is presented as a knowledge that allows to detect damage with efficiency and economy in a number of structures in which at least one dimension is much larger than the other two. This is the case for rails, tubulations and pressure vessels among others. In this work, guided waves propagation characteristics are studied, first in a prismatic bar and then within the geometry of a rail. In both cases, dispersion curves were computed according two different work methodologies, first using an axisymmetric model and then corroborated with a model of periodic conditions. Finally propagation of a Tone-Burst waves were simulated on the analyzed geometries, leading to the discussion of how the waves scatter along its propagation. The results obtained were the dispersion curves of both sections.En las últimas décadas técnicas relacionadas con la medición de ondas elásticas han avanzado sensiblemente. Actualmente, con equipamientos relativamente económicos es posible registrar amplitudes y franjas de frecuencia que eran impensables dos décadas atrás. Este hecho ha motivado que tópicos teóricos que hasta hace un tiempo tenían una aplicación cuestionable tengan que ser desarrollados para poder aprovechar las nuevas potencialidades tecnológicas en la obtención de mayor y mejor información experimental. En este contexto, el estudio de la propagación de ondas guiadas en sólidos se presenta como un conocimiento que posibilita detectar daño con eficiencia y economía en una serie de estructuras en las cuales por lo menos una dimensión es mucho mayor que las otras dos. Es el caso de estructuras tubulares, rieles o recipientes sometidos a presión entre otras. En el presente trabajo se estudian las características de propagación de ondas guiadas primeramente una barra rectangular y posteriormente en la geometría de un riel. En ambos casos, fueron calculadas las curvas de dispersión obtenidas con por dos metodologías de trabajo por elementos finitos, la primer metodología fue emplear un cálculo aplicando un modelo axisimétrico, y luego corroborado con un modelo de condiciones periódicas y posteriormente fue simulada la propagación de una onda tipo Toneburst sobre las geometrías analizadas discutiendo cómo dicha onda se dispersa durante su propagación. Los resultados obtenidos fueron las curvas de dispersión de ambas secciones.application/pdfspaPropagação de ondasTrilhos ferroviáriosEnsaios não-destrutivosDispersion curvesGuided wavesNondestructive testingRailEstudio numérico de la propagación de ondas guiadas en rieles ferroviariosinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisUniversidade Federal do Rio Grande do SulEscola de EngenhariaPrograma de Pós-Graduação em Engenharia MecânicaPorto Alegre, BR-RS2017mestradoinfo:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL001055611.pdf001055611.pdfTexto completo (espanhol)application/pdf4575489http://www.lume.ufrgs.br/bitstream/10183/172119/1/001055611.pdf8fd5e1d12ae22197c0030d2ac9e3a410MD51TEXT001055611.pdf.txt001055611.pdf.txtExtracted Texttext/plain111323http://www.lume.ufrgs.br/bitstream/10183/172119/2/001055611.pdf.txt58d3ffea3fcef2ca91d90fd27f9e164fMD52THUMBNAIL001055611.pdf.jpg001055611.pdf.jpgGenerated Thumbnailimage/jpeg1077http://www.lume.ufrgs.br/bitstream/10183/172119/3/001055611.pdf.jpg9fea027c87fb835f739dd5c900f98411MD5310183/1721192021-05-26 04:37:26.107687oai:www.lume.ufrgs.br:10183/172119Biblioteca Digital de Teses e Dissertaçõeshttps://lume.ufrgs.br/handle/10183/2PUBhttps://lume.ufrgs.br/oai/requestlume@ufrgs.br||lume@ufrgs.bropendoar:18532021-05-26T07:37:26Biblioteca Digital de Teses e Dissertações da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Estudio numérico de la propagación de ondas guiadas en rieles ferroviarios
title Estudio numérico de la propagación de ondas guiadas en rieles ferroviarios
spellingShingle Estudio numérico de la propagación de ondas guiadas en rieles ferroviarios
Idzi, Javier Luis
Propagação de ondas
Trilhos ferroviários
Ensaios não-destrutivos
Dispersion curves
Guided waves
Nondestructive testing
Rail
title_short Estudio numérico de la propagación de ondas guiadas en rieles ferroviarios
title_full Estudio numérico de la propagación de ondas guiadas en rieles ferroviarios
title_fullStr Estudio numérico de la propagación de ondas guiadas en rieles ferroviarios
title_full_unstemmed Estudio numérico de la propagación de ondas guiadas en rieles ferroviarios
title_sort Estudio numérico de la propagación de ondas guiadas en rieles ferroviarios
author Idzi, Javier Luis
author_facet Idzi, Javier Luis
author_role author
dc.contributor.author.fl_str_mv Idzi, Javier Luis
dc.contributor.advisor1.fl_str_mv Iturrioz, Ignacio
contributor_str_mv Iturrioz, Ignacio
dc.subject.por.fl_str_mv Propagação de ondas
Trilhos ferroviários
Ensaios não-destrutivos
topic Propagação de ondas
Trilhos ferroviários
Ensaios não-destrutivos
Dispersion curves
Guided waves
Nondestructive testing
Rail
dc.subject.eng.fl_str_mv Dispersion curves
Guided waves
Nondestructive testing
Rail
description In recent decades techniques related to the measurement of elastic waves have advanced significantly. It is now possible with relatively inexpensive equipment to record amplitudes and frequency bands that were unthinkable two decades ago. This has led to the development of theoretical topics which application was questionable until not long ago, to profit from new technological potential in obtaining more and better experimental information. In this context the study of the propagation of guided waves in solids is presented as a knowledge that allows to detect damage with efficiency and economy in a number of structures in which at least one dimension is much larger than the other two. This is the case for rails, tubulations and pressure vessels among others. In this work, guided waves propagation characteristics are studied, first in a prismatic bar and then within the geometry of a rail. In both cases, dispersion curves were computed according two different work methodologies, first using an axisymmetric model and then corroborated with a model of periodic conditions. Finally propagation of a Tone-Burst waves were simulated on the analyzed geometries, leading to the discussion of how the waves scatter along its propagation. The results obtained were the dispersion curves of both sections.
publishDate 2017
dc.date.issued.fl_str_mv 2017
dc.date.accessioned.fl_str_mv 2018-01-23T02:24:19Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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