Flexible Structures
Mostrando 13-24 de 235 artigos, teses e dissertações.
-
13. High Order Impact Elastic Analysis of Circular Thick Cylindrical Sandwich Panels Subjected to Multi-mass Impacts
Abstract This study dealt with the dynamic model of composite cylindrical sandwich panels with flexible cores and simply supported boundary conditions under low velocity impacts of multiple large or small masses using a new improved higher order sandwich panel theory (IHSAPT). In-plane stresses were considered for the core and face sheets. Formulation was ba
Lat. Am. j. solids struct.. Publicado em: 2015-12
-
14. Numeric reconstruction of 2D cellular actomyosin network from substrate displacement
Introduction: One of the fundamental structural elements of the cell is the cytoskeleton. Along with myosin, actin microfilaments are responsible for cellular contractions, and their organization may be related to pathological changes in myocardial tissue. Due to the complexity of factors involved, numerical modeling of the cytoskeleton has the potential to
Res. Biomed. Eng.. Publicado em: 27/11/2015
-
15. Modal Shape Analysis Using Thermal Imaging
ABSTRACT: In recent years, advances in aeronautical engineering field include, among others, the development of increasingly lightweight and flexible materials, allowing better performance of systems in applications such as Unmanned Aerial Vehicles, photographic model airplanes, light weight aircraft etc. This progress, however, can cause difficulties in des
J. Aerosp. Technol. Manag.. Publicado em: 2015-06
-
16. Bounded creativity: understanding the restrictions on creative work in advertising agencies
The theme of creativity has gained prominence among practitioners and academics, and the emergence of creative industries, which combine creativity and commercial logic, has rendered the topic even more relevant. Creativity is frequently associated with the existence of flexible organizational structures and organizational cultures that favor autonomy and fr
BAR, Braz. Adm. Rev.. Publicado em: 2015-03
-
17. 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
-
18. Posicionamento de sensores/atuadores e escolha de funções de ponderação no controle H-infinito de vibrações / Placement of sensors/actuators and selection of weighting functions in H-infinity control of vibrations
In this work it was used the H infinite control to atenuate vibrations in mechanical structures. Linear matrix inequalities are used to find the optimal controller. Sensors and actuators are incorporated into the project. To determine the best place to allocate them in the structure two methods are used: the first is based on the highest closed-loop H infini
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2012
-
19. Modeling random corrosion processes via polynomial chaos expansion
Polynomial Chaos Expansion (PCE) is widely recognized as a flexible tool to represent different types of random variables/processes. However, applications to real, experimental data are still limited. In this article, PCE is used to represent the random time-evolution of metal corrosion growth in marine environments. The PCE coefficients are determined in or
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012
-
20. Caracterização batimétrica e fisicooceanográfica do canal de acesso ao porto de Cabedelo/PB: uma análise ambiental ao derrame de óleo
The State of Paraíba is one of the most dynamic states of Brazil, strategically located in the northeast, is notable for the excellent potential for integration of different transportation modes forming the states of Rio Grande do Norte, Pernambuco and Alagoas. The dynamic that occurs with port activity causes changes in the space where it is installed. And
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/06/2011
-
21. Modelagem em geometria digital aprimorada por técnicas adaptativas de segmentos de retas. / Digital geometry modelling enhancement by straight line segment adaptive techniques.
For the representation of digital straight lines, digitized straight line segments and arcs, each of the available research approaches has its advantages and suitable applications. However, taking into account the complexities of real-world scenarios, the use of these representations is not so popular in situations that require flexible models or involving s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/05/2011
-
22. Model uncertainties of flexible structures vibrations induced by internal flows
In many situations analysts use incomplete models to design a system, or to make decisions. These models are incomplete due to unmodeled phenomena, which means that some features are not included in the model (either because it was not previously thought about or because it would be too expensive to include). These uncertainties related to the model are diff
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-09
-
23. Estudo de Filmes Automontados de látex de borracha natural, Carboximetil-quitosana e nanopartículas magnéticas / Study of Self-Assembling Films of Natural Rubber Latex, carboxymethyl chitosan and magnetic nanoparticles
In this work, we investigated the fabrication of ultrathin films of natural rubber latex (NRL), carboxymethyl-chitosan (CMC) and magnetite (Fe3O4) nanoparticles (MNP) in different supramolecular architectures. The materials choice was based on the mechanical properties and biocompatibility of NRL, antimicrobial action of CMC and magnetic properties of MNP, w
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/11/2010
-
24. MODELING AND SIMULATION OF FLEXIBLE STRUCTURES: CABLES AND PLATES / MODELAGEM E SIMULAÇÃO DE ESTRUTURAS FLEXÍVEIS: CABOS E PLACAS
Este texto pode ser dividido em duas partes: a primeira trata da modelagem de sistemas dinâmicos, passando da chamada formulação forte ao conceito de formulação variacional, sem antes deixar de apresentar ferramentas básicas do cálculo variacional e o Princípio de Hamilton. Os conceitos são exemplificados por duas estruturas que acompanham todo o te
Publicado em: 2010