Centrifugal Forces
Mostrando 1-12 de 33 artigos, teses e dissertações.
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1. Dynamic analysis of gun barrel vibrations due to effect of an unbalanced projectile considering 2-D transverse displacements of barrel tip using a 3-D element technique
Abstract In this paper, dynamic analysis of two different weapon systems (35 mm Anti-Aircraft Barrel (AAB) and 120 mm Grooved Tank Barrel (GTB)) under the effect of statically unbalanced projectile has been performed with a new 12 DOF 3-D element technique using Finite Element Method (FEM). The muzzle deviations, which negatively affect the barrel shooting a
Lat. Am. j. solids struct.. Publicado em: 06/08/2018
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2. Modal Parameter Extraction of a Huge Four Stage Centrifugal Compressor Using Operational Modal Analysis Method
Abstract In recent years, modal analysis has become one of the essential methods for modification and optimization of dynamic characteristics of engineering structures. This is the first published study to identify modal parameters of a complex four-stage centrifugal compressor using Operational Modal Analysis (OMA). Vibrational response was measured contin
Lat. Am. j. solids struct.. Publicado em: 03/05/2018
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3. Vibration Analysis of Rotating Functionally Graded Cylindrical Shells with Orthogonal Stiffeners
Abstract In this paper, free vibration analysis of rotating functionally graded cylindrical shells with orthogonal stiffeners is presented. Based on Love's first approximation theory and smeared stiffeners technique, the governing equations of motion which take into account the effects of initial hoop tension and also the centrifugal and Coriolis forces due
Lat. Am. j. solids struct.. Publicado em: 2016-12
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4. Design of a new high lateral resistance sleeper and performance comparison with conventional sleepers in a curved railway track by means of finite element models
The lack of lateral resistance in a curved railway track can produce misalignment problems due to the centrifugal forces when the trains pass through. Moreover, most of the times continuous welded rails (CWR) are used in nowadays railway tracks, which can induce the track buckling as a result of thermal loads caused by high temperature gradients. A new sleep
Lat. Am. j. solids struct.. Publicado em: 2014-12
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5. Vibrations of beams with a variable cross-section fixed on rotational rigid disks
The work is focused on the problem of vibrating beams with a variable cross-section fixed on a rotational rigid disk. The beam is loaded by a transversal time varying force orthogonal to an axis of the beam and simultaneously parallel to the disk's plane. There are many ways of usage of the technical moveable systems composed of elements with the variable cr
Lat. Am. j. solids struct.. Publicado em: 2013-01
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6. Jornal Correio Paulistano - constituição e mudança do gênero anúncio de emprego (1854 a 1900) sob a perspectiva crítico-discursiva / Newspaper Correio Paulistano - Constitution and change in Job Advertisements genre (from 1854 to 1900) under a critical-discursive perspective
The aim of this thesis is to present a diachronic analysis of the speech genre job advertisements published in the newspaper Correio Paulistano from 1854 to 1900. Based on the perspective of Mikhail Bakhtin, we will emphasize their constitutive aspects and their relative stability, because speech genres are the product of a dialogic tension between two force
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/08/2012
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7. O conceito de língua/linguagem em 1984 de Orwell
Este trabalho discute o conceito de língua/linguagem em 1984 de George Orwell e relaciona esse conceito com o da linguística oficial russa das décadas de 1920/1930. Para tanto, selecionamos, especificamente, a novilíngua como corpus de pesquisa. A novilíngua consiste em um sistema linguístico elaborado pelos detentores do poder da ficção orwelliana q
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/11/2011
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8. The resigned qualification: the bad formation of workforce how a structural problem of Brazilian development / A qualificação resignada : A má formação da força de trabalho como um problema estrutural do desenvolvimento brasileiro
This work makes a diagnosis of training policy and professional education system in Brazil. The subject had never been so professional education on the agenda in the sociology of work and labor economics, but came to light at the end of the twentieth century, when the new stage of accumulation explained the decline of Fordism-Taylorism, also denouncing the n
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2011
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9. Experimental study of a rotating packed bed distillation column
The purpose of this work was to study the mass transfer performance of rotating packed beds applying the "Higee" process. The operations were carried out with the n-hexane/n-heptane distilling system at atmospheric pressure and under total reflux conditions. The rotating speed could be varied between 300 and 2500 rpm, which provided centrifugal forces from 5
Brazilian Journal of Chemical Engineering. Publicado em: 2009-03
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10. The rhetoric action of book reviewing in the journalistic community: a study of communicative purposes and of the appraisal / A ação retórica de resenhar na comunidade jornalística: um estudo dos propósitos comunicativos e da avaliação
Situated in the field of Text Linguistics, this study aims to discuss the overall relationship between genre,(specifically book reviews,) and community (specifically the journalistic one), throught the analysis of communicative purpose and appraisal categories. In order to achieve this objective, I used the theoretical background of Genre analysis theory (SW
Publicado em: 2009
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11. Análise numérica e experimental dos efeitos da não-uniformidade da espessura em cascas finas cilíndricas rotativas. / Numerical and experimental analysis of the thickness non-uniformity effects in rotating circular cylindrical shells.
Circular cylindrical shells with small thickness variations along their body, when submitted to rotation, present, in some cases, elastic displacements of their outside surface induced by centrifugal forces leading to final oval like shapes. The main purpose of this study is to establish relationships between thickness variation of the cylindrical shells wit
Publicado em: 2007
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12. Aeroservoelastic analysis of the blade-sailing phenomenon in the helicopter-ship dynamic interface.
This thesis proposes a Rotary-Wing Aeroservoelasticity approach to the modeling, analysis and control of the blade-sailing phenomenon in the helicopter-ship dynamic interface (DI), based on the identification, response evaluation and control of flow and ship motion induced loads, during the engagement/disengagement flight regimes, in order to establish some
Publicado em: 2007