Flexible Structures
Mostrando 25-36 de 235 artigos, teses e dissertações.
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25. Comparison between numerical and experimental results on the dynamics of floating system coupled with risers. / Confrontação numérico-experimental da dinâmica de sistema flutuante, considerando seu acoplamento com linhas de produção.
This research aims to present analysis and comparisons, intended to make part of the constant improvement of the oil platform analysis software, called Numerical Offshore Tank (Tanque de Provas Numérico - TPN). For this purpose, small-scale model tests were performed, and the results compared with the numerical model in TPN. The standard unit used in these
Publicado em: 2010
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26. Arquitetura modular de processador multicore, flexível, segura e tolerante a falhas, para sistemas embarcados ciberfísicos. / Modular multicore processor architecture, flexible, securi and fault tolerant, to embedded cyber-physical systems.
Cyber-physical Systems (CPS) are systems where there is an union between computing and physics. The CPS will be used in several areas, forming a new era of systems or devices and could be anywhere, being used by anyone and anything. Applications for CPS include highly reliable medical systems and devices, traffic control and security, advanced automotive, pr
Publicado em: 2010
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27. Reusing of fine quarries in paving: a technical and economical approach / Reaproveitamento de finos de pedreiras em pavimentação: uma abordagem técnica e econômica
The wastes generated by the quarry companies from civil construction represent an activity that has been outstanding because of the countless problems that appear with their stockpiling and maintenance. The great concern with those wastes is linked to the capacity to generate social and environmental effects that can harm the ambient through the appearance o
Publicado em: 2010
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28. Controle de estruturas flexíveis levando em conta o projeto simultâneo da estrutura e do controlador / Flexible structures control considering the simultaneous design of structure and controller
This work proposes techniques for the design of smart structures, that is, those structures that consider simultaneously the design of some of its parameters and the design of the controller. This type of approach allows to find a global design that will result either in a structure without the active controller requirement (i.e. a passive design) or the opt
Publicado em: 2009
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29. Modificação do LLDPE através de silanos viabilizando a aplicação em camadas plásticas de linhas flexíveis / Study of silane grafting reactions of low density polyethylene for pipe applications
The flexible lines are flexible structures manufactured through plastic and steel layers that allows its use in order to permit fluid flow in exploration and production of hydrocarbon between offshore oil units and sea bed and/or coast. Nowadays these pipes are one of the main ways to permit the exploration of hydrocarbon in deepwater. The present study aims
Publicado em: 2009
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30. Stiffness Study of Closed Kinematics Chains / Estudo de rigidez de cadeias cinemáticas fechadas
Multibody systems consist on a kinematic chain composed of links that can be rigid or flexible, interconnected by joints. The multibody systems are of great importance and are used in various applications such as in aerospace and automobile engineering, machine tools, mechanisms, sea exploration, medicine and robotics. An example of multibody system that has
Publicado em: 2009
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31. Study foliated quartzite waste to be the used in structures pavements. / Estudo do resíduo de quartzito foliado para emprego em estruturas de pavimentos.
The purpose of this study is to present an alternative use for quartzite mining wastes as base or subbase materials of flexible pavements. This proposition may not only reduces environmental impacts of quartzite extraction, but also valorises the quartzite aggregates, mainly for road applications. In Brazil quartzite extraction process produces about 90% of
Publicado em: 2009
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32. Modelagem e controle ativo de vibrações de painéis flexíveis de satélites artificiais empregando transdutores piezelétricos / Modeling and Active Vibration Control of Flexible Panels of Artificial Satelites Using Piezoelectric Transducers
Neste trabalho foram desenvolvidos procedimentos de modelagem do comportamento dinâmico de satélites artificiais contendo painéis flexíveis, objetivando o controle de vibrações destes painéis através da ação combinada de uma roda de reação e de atuadores piezelétricos colados às suas superfícies. São primeiramente apresentados alguns elemento
Publicado em: 2009
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33. Dynamic analysis of a cantilever beam excited by a non ideal source / Análise dinâmica de uma viga engastada excitada por uma fonte não ideal
Studies about the dynamic behaviour of nonlinear structures have been to this date subject of extensive research all around the world. Since the beginning of the development of the nonlinear oscillation theory one has tried to understand the basic mechanisms, like disruptions that would cause complex answers on flexible structures. This paper presents a theo
Publicado em: 2009
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34. Análise dos canais de distribuição do etanol carburante brasileiro: um estudo exploratório
The development of flexible-fuel engines and the necessity of an alternative source of energy to the oil (Petroleum) have leaded the ethanol distribution process into a new configuration. These changes brought forth new opportunities to the Brazilian sugarcane ethanol fuel industry and new directions to the development of ethanol marketing channels in the na
Publicado em: 2009
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35. Experimental study of structural behavior of curved bars. / Estudo experimental do comportamento estrutural de barras curvas.
This dissertation deals with an experimental study on the structural behavior of bars supported on a helical cylindrical surface and subject to compressive loads. A special experimental apparatus was designed and built for this purpose. The design, as well as the adjustment of such an apparatus is described in details. The device allows one adjusting the bar
Publicado em: 2009
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36. Pharmacognostic and gastroprotective activity of aqueous leaf extract of Celtis iguanaea (Jacq.) Sargent / Caracterização farmacognóstica e atividade gastroprotetora do extrato aquoso das folhas de Celtis Iguanaea (Jacq.) Sargent
Celtis iguanaea (Jacq.) Sargent is a small postage plant belonging to the Ulmaceae family, it has very flexible branches, usually in a crossed and overcoated form armed with spines. The leaves are short-petioled, ovals and have sizes that vary from 5-13 cm long and 3-7 cm wide. The tea obtained through it leaves is popularly used for body pain, rheumatism, c
Publicado em: 2009