Damping Mechanics
Mostrando 1-9 de 9 artigos, teses e dissertações.
-
1. Respiratory mechanics do not always mirror pulmonary histological changes in emphysema
OBJECTIVE: To verify the accordance of functional and morphometric parameters during the development of emphysema. METHODS: BALB/c mice received a nasal drop of either papain or saline solution and were studied after 1, 3, 15, 28, and 40 days. Functional parameters, such as airway resistance, tissue damping, and tissue elastance, were analyzed. To evaluate t
Clinics. Publicado em: 2011
-
2. Estudo de amortecedor de suspensão veicular eletronicamente parametrizável / Sdudy of a automotive suspension shock absorber electronically parameterized
Este trabalho analisa e compara diferentes conceitos de amortecedores de suspensão automotiva existentes, dentre elas os amortecedores passivos, semi-ativos e os atuadores do sistema de suspensão ativa, propondo um amortecedor eletronicamente parametrizável de forma a permitir o ajuste manual da curva de amortecimento do sistema, como sendo esta uma alter
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2010
-
3. Análise por elementos finitos da influência de descontinuidades geométricas sobre o comportamento dinâmico de rotores flexíveis.
This work deals with a finite element analysis of the dynamic behavior of cracked flexible rotors supported by hydrodynamic journal bearing. Geometric discontinuities such as cracks, holes, undercuts, etc. can strongly affect the vibrational response of rotating systems due to the rotor local flexibility changes. The rotor model is based on the Timoshenko be
Publicado em: 2007
-
4. AnÃlise topolÃgica de redes de ligaÃÃes de hidrogÃnio em um sistema modelo
An analysis of the local and global topological properties of the hydrogen bonds networks between water molecules, generated by Monte Carlo (MC-NPT) simulations near to supercritical conditions and using the TIP5P model potential for water-water interactions, indicates the appearance of small worlds patterns with large clustering coefficient and small path l
Publicado em: 2006
-
5. Modeling of a vehicle suspension with non linear elements and performance comparison to a semi-active model / Modelagem de uma suspensão veicular com elementos não lineares e comparação de seu desempenho com um modelo semi-ativo
This work describes the analysis and comparison of a vehicle suspension semi-active controlled to a non linear passive system. The mathematic model of a suspension system, detailed in this work, has seven degrees of freedom in order to represent a full vehicle system. The two semi-active control laws used in this work are based on the skyhook theory. In the
Publicado em: 2005
-
6. Contribuição ao emprego da mecânica do dano para a análise do comportamento dinâmico não-linear de vigas em concreto armado / Contribution to the application of damage mechanics in non-linear dynamic behaviour analysis of reinforced concrete beams
O trabalho trata da formulação e implementação numérica de um modelo de dano para o concreto. O objetivo é o de reproduzir laços de histerese observados experimentalmente em diagramas de tensão-deformação uniaxiais quando, a partir de um certo nível de solicitação, e dano correspondente, passam-se a realizar ciclos de descarregamento e recarrega
Publicado em: 2003
-
7. Microengineered hydromechanical cochlear model
Micromachined fluid-filled variable impedance waveguides intended to mimic the mechanics of the passive mammalian cochlea have been fabricated and experimentally examined. The structures were microfabricated with dimensions similar to those of the biological system. Experimental tests demonstrate acoustically excited traveling fluid-structure waves with phas
National Academy of Sciences.
-
8. Neonatal oxygen adversely affects lung function in adult mice without altering surfactant composition or activity
Despite its potentially adverse effects on lung development and function, supplemental oxygen is often used to treat premature infants in respiratory distress. To understand how neonatal hyperoxia can permanently disrupt lung development, we previously reported increased lung compliance, greater alveolar simplification, and disrupted epithelial development i
American Physiological Society.
-
9. Dynamic control of muscle stiffness and H reflex modulation during hopping and jumping in man.
1. The objective of the study was to evaluate the functional effects of reflexes on muscle mechanics during natural voluntary movements. The excitability of the H (Hoffmann) reflex was used as a measure of the excitability of the central component of the stretch reflex. 2. We recorded EMG, ground reaction forces and the H reflex in the soleus muscle in human