Geometric Non Linear Analysis
Mostrando 13-24 de 37 artigos, teses e dissertações.
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13. Structural analysis of bending stiffeners with complex geometries utilized in offshore operations. / Análise estrutural de enrijecedores à flexão de geometria complexa utilizados em operações offshore.
The bending stiffeners discussed in this work are ancillary structural components installed on flexible lines at their connections with floating units in offshore oil production systems. The configuration of these accessories must provide the installation with a gradual variation of the bending stiffness near the lines attaching point, smoothing the curvatur
Publicado em: 2008
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14. MODELAGEM E SIMULAÇÃO DA DINÂMICA DE BÓIAS DE SUPERFÍCIE ANCORADAS / MODELING AND SIMULATION OF THE DYNAMIC OF SURFACE MOORED BUOYS
In this work a method for two-dimensional dynamic analysis of a cylindrical buoy under surfaced waves and moored to the seafloor by a flexible riser is presented. The finite element model used to describe the dynamics of the maritime line was developed by Lustosa (2002). This is a two node beam element based on the Euler-Bernoulli theory, with the element ki
Publicado em: 2008
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15. Desenvolvimento de programa livre para análise de pórticos tridimensionais considerando-se a não linearidade geométrica, fissuração do concreto e ligações semi-rígidas
Structural analysis of framed structures using discrete method, wherein, splitting them into elements with simplified considerations, can bring not satisfactory results or end up using very high safety coefficient to the structure. With the growth of computing and microcomputers it is feasible the resolution of structures considering all parts, therefore thr
Publicado em: 2007
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16. Structural behaviour of steel beams with web opening / Comportamento estrutural de vigas de aço com abertura na alma
Limitações de altura são frequentemente impostas à edificações de múltiplos pavimentos por regulamentos de zoneamento urbano, aspectos econômicos e considerações estéticas. Um pé-direito alto é normalmente requerido para se permitir a passagem de tubulações e dutos de grande diâmetro sob vigas de aço, conduzindo muitas vezes à alturas inace
Publicado em: 2007
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17. Otimização de estruturas reticuladas planas com comportamento geometricamente não linear / Optimization of plane frame structures with behavior geometrically nonlinear
The aim of this work is to present a formulation and corresponding computational implementation for sizing optimization of plane frames and cable-stayed columns considering geometric non liner behavior. The structural analysis is based on the finite element method using the updated lagrangian approach for plane frame and cable elements, which are represented
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/10/2006
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18. Topological sensivity analysis in problems with geometric non-linearities and nonlinear nearly-incompressible hiperelasticity / Analise de sensibildade topologica em problemas de não-linearidade geometrica e hiperelasticidade não-linear quasi-incompressivel
The aim of the present work is to optimize the topology of elasticity problems with geometric nonlinearities (large displacement and rotation) and material nonlinearities, in this case, nonlinear nearly-incompressible hyperelasticity applying the concept of Topological Sensitivity Analysis (TSA) and a total Lagrangian formulation. The TSA results in a scalar
Publicado em: 2006
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19. Theoretical and experimental analysis of cold-formed steel members under compression / Análise teórica e experimental de perfis de aço formados a frio submetidos à compressão
Cold-formed steel members present, in general, higher local slenderness than classical hot- rolled ones, which make them more prone to local buckling. Besides, thin-walled open sections have small torsional stiffness, and hence global torsional and flexural-torsional instability modes are many times more critical than global flexural ones. Also, distortional
Publicado em: 2006
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20. Aplicação da descrição cinemática co-rotacional na análise não-linear geométrica de estruturas discretizadas por elementos finitos de treliças, vigas e cascas / The application of the co-rotational kinematic description to the geometrically non-linear analysis of structures modeled by truss, beam and shell finite elements
The co-rotational formulation was used as the kinematic description to evaluate the geometrically non-linear behavior of different types of structures on a static analysis. Along the current research, it was aimed to demonstrate the basic concepts of the co-rotational approach that is based on the separation of the total motion into rigid body and deformatio
Publicado em: 2006
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21. VIBRATION CONTROL OF SLENDER TOWERS WITH A PENDULUM ABSORBER / ABSORSOR PENDULAR PARA CONTROLE DE VIBRAÇÕES DE TORRES ESBELTAS
In the present work the performance of a pendulum absorber in the vibration control of tall and slender towers, caused by dynamic loads, such as, environmental loads, is studied in detail. Due to the possibility of large amplitude oscillations, the non-linearity of the pendulum is considered in the modeling of the problem. The main objective of this research
Publicado em: 2006
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22. Análise da base de pilares pré-moldados na ligação com cálice de fundação / Analysis of the precast concrete column base in the connection socket
The study presents the analysis of precast concrete column base in the connection socket. This research follows previous studies on this connection type. The research aim to fill out the lack of information about column base in the embedded length, because almost do not exist recommendations about this subject. An experimental investigation was developed wit
Publicado em: 2006
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23. CONECTOR DE CISALHAMENTO EM PERFIL FORMADO A FRIO: ANÁLISE VIA MODELAGEM COMPUTACIONAL
In a composite system, a steel beam (laminated, welded or cold formed) is associated with a concrete slab, forming a composite beam. The interaction between concrete and steel can be mechanical, by friction or, in some cases, only by adherence. One of the major advantages of the composite beams is the increase in strength and stiffness due to association of
Publicado em: 2006
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24. STATIC AND DYNAMIC INSTABILITY OF PLANE FRAMES WITH SEMI-RIGID CONNECTIONS / INSTABILIDADE ESTÁTICA E DINÂMICA DE PÓRTICOS PLANOS COM LIGAÇÕES SEMI-RÍGIDAS
The main objective of this thesis is to develop a numerical methodology for the nonlinear static and dynamics analysis of plane frames with semi-rigid connections. Initially, the formulations of the adopted finite elements are presented and implemented together with numerical methodologies for the solution of the non-linear equilibrium equations. Then, some
Publicado em: 2004