Non Linear Dynamic
Mostrando 13-24 de 143 artigos, teses e dissertações.
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13. Multi-model MPC with output feedback
In this work, a new formulation is presented for the model predictive control (MPC) of a process system that is represented by a finite set of models, each one corresponding to a different operating point. The general case is considered of systems with stable and integrating outputs in closed-loop with output feedback. For this purpose, the controller is bas
Braz. J. Chem. Eng.. Publicado em: 2014-03
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14. Buckling configurations and dynamic response of buckled Euler-Bernoulli beams with non-classical supports
Exact solutions of buckling configurations and vibration response of post-buckled configurations of beams with non-classical boundary conditions (e.g., elastically supported) are presented using the Euler-Bernoulli theory. The geometric nonlinearity arising from mid-plane stretching (i.e., the von Kármán nonlinear strain) is considered in the formulation.
Lat. Am. j. solids struct.. Publicado em: 2014
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15. General exact harmonic analysis of in-plane timoshenko beam structures
The exact solution for the problem of damped, steady state response, of in-plane Timoshenko frames subjected to harmonically time varying external forces is here described. The solution is obtained by using the classical dynamic stiffness matrix (DSM), which is non-linear and transcendental in respect to the excitation frequency, and by performing the harmon
Lat. Am. j. solids struct.. Publicado em: 2014
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16. 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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17. Modelagem do comportamento dinâmico de edifícios mistos (aço-concreto) submetidos à ação do vento. / Modeling of the dynamic behaviour of steel-concrete composite buildings submited to wind actions.
Based on a favorable economic scenario and technological advances of material sciences and construction processes, in the last three decades, the Brazilian cities have presented a substantial growth, with respect to construction of residential and commercial multi-storey buildings. Nowadays, these buildings present greater slenderness and have been construct
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/05/2012
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18. Relação dinâmica entre a estrutura de propriedade e controle e o valor de mercado corporativo no Brasil: análise da primeira década do século XXI / Dynamic relationship between ownership and control structure and corporate market value in Brazil: Analysis of first decade of XXI century
The Brazilian model of corporate governance is characterized by the ownership and control concentration of most publicly traded companies. In this context, the academic literature points to the existence of a positive and a negative impacts of this shares accumulation by controller (s) on corporate performance, known respectively as incentive effect (or alig
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/04/2012
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19. Experiência, narrativa e intersubjetividade : o processo de restabelecimento ("recovery") na perspectiva de pessoas com o diagnóstico de esquizofrenia em tratamento nos centros de atenção psicossocial / Experience, narrative and intersubjectivity : the process of recorvery in the perspective of persons with the diagnosis of shizophrenia in treatment at the psychosoial care centers
The recovery process, in the perspective of persons who received the diagnosis of schizophrenia, it has been increasingly studied worldwide. Since the 1960 s, different studies has been questioned the kraepelin´s legacy in which schizophrenia is seen as necessarily degenerating and chronic disorder. Such studies reveal the existence of a wide and heterogene
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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20. Criação e performance musical no contexto dos instrumentos musicais digitais / Music creation and performance in the context of digital musical instruments
This work presents a study about the computer as an instrument for musical performance. Based on this study we developed processes of music creation using the algorithmic representation and the computer code. The two main technical resources we applied in our works were: a sound synthesis method based on the generation of waveforms by non-linear equations; a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/01/2012
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21. In-situ quasi-static and dynamic behavioural response of steel tubular frames subjected to lateral impact loads
Steel tubular members are widely used as primary and secondary structural framing members in offshore oil and gas platforms. A platform is inherently liable to collisions from ships which can create severe structural damages in the rig. The effect of this damage has been studied by a number of researchers through investigating the impact behaviour isolated t
Lat. Am. j. solids struct.. Publicado em: 2012-06
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22. Dynamics of rotating non-linear thin-walled composite beams: analysis of modeling uncertainties
In this article a non-linear model for dynamic analysis of rotating thin-walled composite beams is introduced. The theory is deduced in the context of classic variational principles and the finite element method is employed to discretize and furnish a numerical approximation to the motion equations. The model considers shear flexibility as well as non-linear
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012
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23. Identificação inversa de sistemas dinâmicos não-lineares com parâmetros dependentes do deslocamento / Inverse identification for non-linear dynamic systems with displacement dependent parameters
As simulações físicas em laboratórios da indústria automotiva são realizadas utilizando informações colhidas de veículos que são submetidos a ciclos de testes em rotas urbanas. Medir as respostas em pontos específicos durante uma rota de teste, não significa conhecer as excitações a que o veículo esta sendo submetido, visto que este normalment
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/07/2011
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24. Análise da interação solo-estrutura aplicada a riser rígido em catenária através da formulação co-rotacional / Analysis of the soil-structure interaction applied to steel catenary riser using corotational formulation
A explotação de petróleo em ambientes off-shore possui inúmeras dificuldades, dentre as quais lâminas d águas cada vez mais profundas. Neste contexto, as linhas submarinas são componentes de grande importância nesta atividade, pois estabelecem a comunicação entre as unidades de produção e os equipamentos submarinos. Este trabalho estuda a intera�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/06/2011