Non Linear Dynamic Theory
Mostrando 13-21 de 21 artigos, teses e dissertações.
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13. Avaliation of cracking process in concrete beams considering dinamics aspects / Avaliação do processo de ruptura em vigas de concreto considerando os aspectos dinâmicos
The concrete is a quasibrittle and heterogeneous material. These attributes are favourable to arise cracks that could propagate with time in a loaded structures. Some advances of the fracture mechanics theory applied to concrete have been already achieved. Nowadays, there are three basics models of constitutive diagrams used to simulate the concrete behaviou
Publicado em: 2006
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14. Vibrações ressonantes não-lineares em estruturas tipo viga sob excitação paramétrica e combinada / Nonlinear resonance vibrations in beam type structures under parametric and combined excitations
This document presents results of theoretical and experimental investigations on the non-linear vibration characteristics of an important class of flexible structures. The motivation for such a study arises mainly from the increasing need for lightweight structural members. The weight reduction associated to the use of novel materials contribute to the incre
Publicado em: 2006
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15. Modelo de gestão não-linear: a teoria do caos e complexidade aplicada à gestão de empresas de alto crescimento em ambientes dinâmicos e imprevisíveis / Non linear management model: the chaos and complexity theory aplied to the management of high growth companies operating in dynamic and unforeseeable environment
Este estudo aborda a aplicação da teoria do caos e complexidade na gestão de empresas que operam em ambientes dinâmicos e imprevisíveis. O objetivo geral do estudo consiste no desenvolvimento conceitual de um modelo de gestão não-linear, tendo como base os conceitos da teoria do caos e complexidade. Os objetivos específicos consistem em avaliar o gra
Publicado em: 2005
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16. Modelagem e analise de digestores Kraft descontinuo
Global1y, the Kraft pulping process is beginning to get use of the benefits of the recent developments in the modeling area and process control. Advanced techniques of simulation and control offer tools that allow the analysis and efficient design of multivariable non-linear process, involving the optimization and the advanced control of the process. The pul
Publicado em: 2004
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17. Non-Linear Unsteady Aerodynamic Response Approximation Using Multi-Layer Functionals
Non-linear functional representation of the aerodynamic response provides a convenient mathematical model for motion-induced unsteady transonic aerodynamic loads response, that accounts for both complex non-linearities and time-history effects. A recent development, based on functional approximation theory, has established a novel functional form; namely, th
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2002-03
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18. Analise não linear de sistemas dinamicos holonomos não ideais / Nonlinear anaIysis of non ideals holonomic dynamical systems
Several times the mechanical systems join the behavior described by laws of motion to the dynamic of their operation. Their solution pass by adopted simplified hypotheses in order to obtain a representative and helpful mathematical model. When the energy source used in the bringing to the action of the motion has limited power, i.e., there is not sufficient
Publicado em: 2002
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19. Um estudo de placas sob cargas dinamicas estacionarias e com o efeito da não linearidade geometrica sob cargas estaticas usando o metodo dos elementos de contorno
The Boundary Element Method was used to study plates with small strain hypotheses under classical theory. The geometrical non-linearity effect was considered to obtain in plane critical loads for homogeneous and isotropic plates. On the other hand, the natural frequencies of the plates were computed using the free vibration theory. Several plates were analyz
Publicado em: 2001
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20. Identificação e controle de processos não lineares utilizando redes neurais artificiais
Considering that most of the industrial processes of interest to Chemical Engineering present a certain degree of inherent non-linearity or one introduced by systems of automatic control, an important necessity of inquiring about the performance the new techniques derived from artificial intelligence, whose interest here is in the artificial neural networks,
Publicado em: 2001
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21. Dinamica e controle de colunas de destilação : aplicação a sistemas de elevada pureza
The main objective of the present study is the mathematical modelling, simulation and control of distillation columns processing high-purity overhead products. The phenomenological aspects of the dynamic behavior of columns are analysed at first to obtain a model which takes into account the main variables, beeing also flexible, reliable and practical. The n
Publicado em: 1993