Shape Optimization Method
Mostrando 13-24 de 35 artigos, teses e dissertações.
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13. Application of the Complex Variable Semi-analytical Method for Improved Displacement Sensitivity Evaluation in Geometrically Nonlinear Truss Problems
AbstractThe application of gradient-based methods to structural optimization problems usually requires the determination of displacement sensitivities with respect to design variables. In this regard, it is important to have at hand comprehensive methods for sensitivity analysis, which show stability, efficiency and accuracy. Particularly, application of the
Lat. Am. j. solids struct.. Publicado em: 2015-05
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14. âNova rota de sÃntese de nanopartÃculas de NiMn2O4 usando o MÃtodo Sol-Gel ProtÃicoâ / "New route of synthesis nanoparticles NiMn2O4 method using sol-gel protein."
This work presents a new route for the synthesis of nickel manganate (NiMn2O4) through the sol-gel protein method, using gelatin as an organic precursor. The synthesis of nanoparticles was performed by dilution of inorganic salts (NiCl2.6H2O, MnCl2.4H2O) and gelatin in distilled water with the addition of sodium hydroxide (NaOH). This solution was then place
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/01/2011
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15. Modelo computacional de cortes para otimizar o potencial de geração de usinas hidrelétricas / Computacional model of cuts to optimize the potential to generate hydro power plants
The repowering of hydro power plants increases their generating capacity by improving the structure or changing equipment. It is a low cost alternative to improve the generation capacity comparing with the building of new plants. Repowering by changing the hydro-turbines is the focus of this work. By doing that, the efficiency of the energy generation proces
Publicado em: 2011
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16. Determination of stall and choke limits of a transonic axial flow compressor using the straemline curvature method
The necessity for high performance axial compressors for various applications is shown. The basic theory associated with the study of these machines is presented. A method for calculating the properties of the flow along the compressor is presented. Depending on the design requirements the number of stages is selected and an appropriate shape of the channel
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/10/2010
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17. Investigation of the adjoint method in aerodynamic optimization using various shape parameterization techniques
This paper studies the effect of design variables vector on automatic aerodynamic shape optimization in the adjoint method. Three shape techniques are studied: surface points, relations of the NACA 4-digit airfoil series and Hicks-Henne "Bump" Functions. First, this paper presents the complete formulation of the optimal design problem for the Euler equations
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-06
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18. Otimização de forma de cascas via deformação livre de forma baseado em NURBS / Shape optimization of shell via free-form deformation NURBSbased
Neste trabalho buscou-se consolidar a união entre três áreas do conhecimento: a parametrização de curvas e superfícies do tipo B-spline racionais não-uniformes (NURBS), a otimização matemática e a análise estrutural por elementos finitos. A união destas três áreas é realizada neste trabalho através da otimização de formas de cascas, devido
Publicado em: 2010
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19. Proposta de procedimentos de desenvolvimento de suportes aplicados em chassi veicular. / Proposal of bracklets development procedures applied in vehicle chassis.
The objective of this work is to achieve a procedure for structural design optimized metal brackets used in the chassis of commercial vehicles, which have in the most of the cases limitations related to product design and manufacturing. Was carried out a bibliographic review of structural optimization main methods, covering problems and solutions related to
Publicado em: 2009
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20. Problema de reagrupamento capacitado / Redistricting capacitated problem
The aim of this dissertation is to develop an eficient methodology to solve the multicriteria redistricting capacitated problem (PACM), in which objects with associated weights are given, which must be partitioned into groups with limited capacity. In this work, the PACM is inserted in to a reassignment problem of urban clusters of clients, in which the read
Publicado em: 2009
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21. Otimização de forma aplicando B-splines sob critério integral de tensões
Neste trabalho propõe-se uma metodologia computacional para resolver problemas de Otimização de Forma para projeto estrutural. A aplicação é particularizada para problemas bidimensionais em estado plano de tensões, de modo a minimizar a massa atendendo um critério de tensão. Para atender ao critério paramétrico de tensões é proposto um critério
Publicado em: 2009
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22. Análise de sensibilidade topológica de segunda ordem / Second order topological sensitivity analysis
The topological derivative provides the sensitivity of a given shape functional with respect to an infinitesimal non-smooth domain pertubation (insertion of hole or inclusion, for instance). Classically, this derivative comes from the second term of the topological asymptotic expansion, dealing only with inifinitesimal pertubations. However, for pratical app
Publicado em: 2008
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23. Minimização da variação do erro de transmissão de pares engrenados atraves da modificação da superficie dos dentes / Minimization of transmission error excitation of gear pairs through tooth surface modification
Noise that comes from geared systems can be annoying, and in some cases unacceptable by users of those systems. Gear noise is dose to pure tone, presents high amplitude, and its frequency is near to most sensitive region of human ear. Transmission error (TE) excitation is recognized as one of the main sources of gear noise and vibration. It is well-known tha
Publicado em: 2007
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24. Moisture effective diffusivity in porous solid mixtures / Difusividade efetiva de agua em misturas de solidos porosos
Porous solids have been applied in several industrial sectors, mainly as mixture of different solids. The physical characterization as well as the effective diffusivity of these materiaIs are important to the optimization of industrial processes that apply mass transport in porous solids. Investigations about effective diffusivity in solid mixture indicated
Publicado em: 2007