Parametric Design
Mostrando 37-48 de 119 artigos, teses e dissertações.
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37. Study on the capacity of cold-formes steel built-up battened colums under axial compression
This paper presents the theoretical and numerical investigation results of the pin ended cold-formed steel built-up battened columns under axial compression. The finite element model was developed using the finite element software ABAQUS. The comparison of finite element analysis results match with the test results available in the literature shows that the
Lat. Am. j. solids struct.. Publicado em: 2014
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38. Investigation of the heave dynamics of Air Cushion Vehicles (ACV): parametric and chaotic studies
A highly non-linear model for the dynamics behavior of Air Cushion Vehicles (ACV) is presented. In this model the compressible Bernoulli's equation, the Newton's second law of motion, and the nonlinear isentropic relations are used to predict the dynamics behavior of only the vertical response of the ACV in both time and frequency domains. In this paper the
Lat. Am. j. solids struct.. Publicado em: 2013-07
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39. Design of four-wave mixing frequency-shift-free amplitude regenerators
Frequency-shift-free all-optical amplitude regenerators based on fiber-four-wave mixing were investigated by means of simulations. These regenerators, comprised of two stages of highly nonlinear dispersion-shifted fiber, were designed using a heuristic procedure that implements a routine based on a genetic algorithm to optimize the device performance. A bit
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-06
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40. Transverse load distribution of skew cast-in-place concrete multicell box - girder bridges subjected to traffic condition
Concrete multicell box-girder bridges are a common choice among the designers for various ranges of bridges. In order to provide safer and greater speed of traffic, the roadway is built as straight as possible. The use of skewed bridges has increased considerably in the recent years for roadway. The skewed bridges have quite different mechanical behavior fro
Lat. Am. j. solids struct.. Publicado em: 2013-03
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41. NUMERICAL ANALYSIS OF THE BEHAVIOR OF FLAT SLABS PRESTRESSED CONCRETE FLOORS / ANÁLISE NUMÉRICA DO COMPORTAMENTO DE PAVIMENTOS CONSTITUÍDOS DE LAJES LISAS DE CONCRETO PROTENDIDO
Concrete flat slabs prestressed with unbounded greased strands have been used in building floors over the last years. This structural solution is ideal when the columns are regularly distributed. In addition, it is known that prestressed floors have some technical advantages when compared to the traditional solution in reinforced concrete, mainly in cases of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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42. Controle ativo de vibrações em estruturas flexíveis com incertezas paramétricas / Active vibration control of flexible structures with parametric uncertainties
The aim of this dissertation is to study the H-infinity robust control techniques for linear dynamic systems with parametric uncertainties. The finite element method was employed to find the model of the flexible structure. When dealing with the model, parametric uncertainties were considered for natural frequencies and for damping of the structure. The para
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2012
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43. Bonded Joints Design Aided by Computational Tool
Abstract: In order to aid the design of bonded joints, a computational tool named System of Analysis for Joints (SAJ) was developed. The software can analyze single and double lap bonded joint with composite-composite or metal-composite materials as adherent parts. Thus, SAJ can calculate the stress distribution, loads and displacements. Their results were c
J. Aerosp. Technol. Manag.. Publicado em: 2012-09
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44. Performance of broilers experimentally inoculated with Salmonella Typhimurium and fed diets with addition of lactulosis
The objective of this experiment was to evaluate the influence of lactulose on performance as well as its ability to prevent colonization by Salmonella Typhimurium in broilers orally inoculated with this pathogen. The design adopted was completely randomized, with 630 one-day-old male chicks distributed into six treatments, with seven replications and 15 bir
R. Bras. Zootec.. Publicado em: 2012-08
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45. Modelling of fertilizer drying in a rotary dryer: parametric sensitivity analysis
This study analyzed the influence of the following parameters: overall volumetric heat transfer coefficient, coefficient of heat loss, drying rate, specific heat of the solid and specific heat of dry air on the prediction of a model for the fertilizer drying in rotary dryers. The method of parametric sensitivity using an experimental design was employed in t
Brazilian Journal of Chemical Engineering. Publicado em: 2012-06
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46. A procedure for the parametric identification of viscoelastic dampers accounting for preload
Passive vibration isolators are usually made of viscoelastic materials. These materials have non-linear characteristics that change their dynamical properties with temperature, frequency and strain level. The vibration isolator's mathematical modeling and optimal design require the prior knowledge of the stiffness and damping of the applied viscoelastic mate
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2012-06
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47. Conforto e orientação na percepção da acessibilidade urbana : área central de Pelotas - RS
This research analyses the factors that affect the comfort and spatial orientation in the universal accessibility in urban centers, according to the perception of different groups of users, under distinct mobility conditions. The main objective was to contribute to the comprehension of how and which factors can contribute for the universal accessibility of u
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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48. Um sistema de ensino de projeto baseado no conhecimento : sistemas generativos e ontologias aplicados no ensino de arquitetura paisagística / Developing a knowledge based design education method : using generative systems and onthology to teach landscape design
The purpose of this research is to present a case based system to support students during the search for a solution to a landscape design problem. The system model is based on computational theories applied to design, such as Alexander s pattern language, shape grammar and parametric modeling. In the system, a design concept, also called pattern, can be repr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/10/2011