Rail
Mostrando 1-12 de 93 artigos, teses e dissertações.
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1. Performance of a diesel engine using different biodiesel blends and injection configurations
RESUMO Os motores ciclo diesel são amplamente empregados para a execução das mais diversas atividades agrícolas. Recentemente, com o incremento da utilização do biodiesel em mistura ao diesel de petróleo e o início da vigência da regulamentação de emissões de poluentes em máquinas agrícolas e rodoviárias, ocorreu uma crescente migração do si
Revista Brasileira de Engenharia Agrícola e Ambiental. Publicado em: 2023
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2. Use of dynamic ballast testing equipment for analysis of rail aggregate breakdown
Abstract The granulometric range used has a direct influence on the life of the ballast layer when subjected to the load generated by rail traffic. However, in Brazil, we have only two size ranges to be used. The publications related to the subject matter under study express the need for a continuous grain size strip, different from the ones usually used in
REM, Int. Eng. J.. Publicado em: 2021-06
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3. Method to assess the atmospheric pollutant emissions generated by railway track maintenance
Abstract Paper aims Propose a method to calculate and evaluate the pollutants emissions generated by the track maintenance process considering the life cycle of the three components: ballast, sleepers and rail. Originality After the literature review, we did not find any published research that quantifies, in an integrated way, the atmospheric pollutants e
Prod.. Publicado em: 13/12/2019
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4. Selection of a Hyper-Elastic Material Model - a Case Study for a Polyurethane Component
Abstract The aim of this study was to select an appropriate material model for a polyurethane rail pad. The considered material was assumed to be hyper-elastic, and model selection was limited only to the Mooney-Rivlin (M-R) material models available in the MSC.Marc/Mentat system. The selection of the most appropriate material model was based on the most acc
Lat. Am. j. solids struct.. Publicado em: 27/06/2019
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5. Modelo matemático para planejamento da distribuição de locomotivas para atendimento à demanda de formação de trens
Resumo O custo operacional para distribuir locomotivas ao longo dos pátios ferroviários com o objetivo de atender às demandas de formação de trens é muito alto. assim, este artigo propõe um modelo matemático para planejamento da distribuição de locomotivas que visa atender às requisições dos pátios, Locomotive Scheduling Problem (LSP), com o in
Gest. Prod.. Publicado em: 09/05/2019
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6. A Intermodalidade no Transporte de Etanol Brasileiro: aplicação de um modelo de equilíbrio parcial
Resumo: A busca por fontes de energia renováveis tem aumentado a demanda mundial de etanol. O Brasil é o segundo maior produtor; porém, os custos para transportar a produção são cada vez mais altos. O objetivo do presente artigo é analisar as alternativas de transporte para o etanol frente às condições da logística vigentes no Brasil. Para tanto,
Rev. Econ. Sociol. Rural. Publicado em: 06/05/2019
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7. Center of mass of a system of variable mass particles
Abstract We study the dynamics of the center of mass (CM) of a set of particles when the number of particles in the system varies during a short interval of time, or when the value of the mass of one of the particles depends on time. We show that in both situations, while the population or mass of the system varies, the linear momentum of the CM differs from
Rev. Bras. Ensino Fís.. Publicado em: 21/02/2019
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8. Wheel-flat detection on trams using envelope analysis with Hilbert transform
Abstract The wheel-flat defect is one of the many issues decreasing the level of and comfort in light rail vehicles. The two main causes of wheel-flats are temporary or complete wheel blocking. The negative effect is the increase of the dynamic phenomenons in the wheel-rail interaction, which are impulsive in their nature. It could prove to be dangerous for
Lat. Am. j. solids struct.. Publicado em: 18/02/2019
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9. Development of a Heavy Containment Level Bridge Rail for Istanbul
Abstract The international highways within the city limits of Istanbul are used to transit more than 15 million trucks and other heavy good vehicles per year. According to the statistics, the number of single truck run of the road accidents is in the rise. Recent accidents on bridges showed that currently used bridge rails specified by Istanbul Metropolitan
Lat. Am. j. solids struct.. Publicado em: 02/07/2018
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10. Efeito imediato de uma sessão de treinamento do método Pilates sobre o padrão de cocontração dos músculos estabilizadores do tronco em indivíduos com e sem dor lombar crônica inespecífica
RESUMO Este estudo teve por objetivo analisar o efeito imediato de uma sessão de exercícios do método Pilates sobre o padrão de cocontração (agonista/antagonista) dos músculos superficiais (iliocostal lombar e reto abdominal) e profundos (oblíquo interno e multífido) do tronco em indivíduos com e sem dor lombar durante teste de resistência muscula
Fisioter. Pesqui.. Publicado em: 2018-06
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11. Rolling Contact Fatigue Life of Rail for Different Slip Conditions
Abstract A three-dimensional elastic-plastic finite element analysis (FEA) is carried out to estimate the rolling contact fatigue (RCF) crack initiation life for varied slip range on the rail arising from operational variations. The wheel load produces Hertzian contact pressure. Variation in engine traction induces slip variations that evolves thermal load i
Lat. Am. j. solids struct.. Publicado em: 2017-12
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12. Chemical and mineralogical characterization of silicon manganese iron slag as railway ballast
Abstract In nature, metal ores such as iron, lead, aluminum and others are found in an impure state, sometimes oxidized and mixed with silicates of other metals. During casting, when the ore is exposed to high temperatures, these impurities are separated from the molten metal and can be removed. The mass formed by these compounds is slag. Slag is the co-prod
REM, Int. Eng. J.. Publicado em: 2017-12