Passive Vibration Control
Mostrando 1-12 de 20 artigos, teses e dissertações.
-
1. Effects of soil-structure interaction in seismic analysis of buildings with multiple pressurized tuned liquid column dampers
Abstract In this paper soil-structure interaction (SSI) effects are investigated while an array of Pressurized Tuned Liquid Column Dampers (PTLCD) is employed for seismic vibration control of buildings. This device represents the most general case of a passive damper, with different reduction options to other control devices obtained by simplifying the invol
Lat. Am. j. solids struct.. Publicado em: 12/09/2019
-
2. ON AN INTEGRATED DYNAMIC CHARACTERIZATION OF VISCOELASTIC MATERIALS BY FRACTIONAL DERIVATIVE AND GHM MODELS
Abstract The passive vibration control of mechanical systems under unwanted vibrations can be accomplished in a very effective way by using devices incorporating viscoelastic materials. The design of such devices requires a broad knowledge of the dynamic properties of the employed viscoelastic material, usually supplied by adequate mathematical models. Among
Lat. Am. j. solids struct.. Publicado em: 14/03/2019
-
3. Passive vibration control using a metaconcrete thin plate
Abstract We investigated the band structure of flexural waves propagating in a metaconcrete thin plate, consisting of a concrete matrix reinforced by steel inclusions coated by rubber in square and triangular lattices. We considered the classical Kirchhoff-Love thin plate theory. We also studied the influence of inclusion geometry - circular, square and rota
Cerâmica. Publicado em: 2019-01
-
4. Control of input delayed pneumatic vibration isolation table using adaptive fuzzy sliding mode
AbstractPneumatic isolators are promising candidates for increasing the quality of accurate instruments. For this purpose, higher performance of such isolators is a prerequisite. In particular, the time-delay due to the air transmission is an inherent issue with pneumatic systems, which needs to be overcome using modern control methods. In this paper an adap
Lat. Am. j. solids struct.. Publicado em: 2015-08
-
5. Estudo do ruído de rodagem estrutural através da análise dos caminhos de transferência de energia - TPA / Structure-borne road noise study using transfer path analysis, TPA
The road noise, vibration and harshness (Road NVH) present from 20 Hz to 1000 Hz approximately, begins from the tires vibration and acoustic propagation and their interactions with the road surfaces. In these noise sources, both structural-borne and air-borne noise contributions are relevant to vehicle refinement. The constant efforts to study the vehicle as
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/05/2011
-
6. Self-Tuning Multimodal Piezoelectric Shunt Damping
Piezoelectric shunt damping is a well known structural vibration control technique that consists in connecting an electrical circuit to a piezoelectric transducer attached to the structure. In the case of a resonant shunt, the network consisting of an inductor-resistor network when combined with the capacitive nature of the piezoelectric transducer impedance
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-12
-
7. Structural vibration control using extension and shear active-passive piezoelectric networks including sensitivity to electrical uncertainties
Active-Passive Piezoelectric Networks (APPN) integrate active voltage sources with passive resistance-inductance shunt circuits to a piezoelectric patch. This technique allows to simultaneously passively dissipate vibratory energy through the shunt circuit and actively control the structural vibrations. This work presents an analysis of active-passive dampin
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-09
-
8. Modelagem numérico-computacional e avaliação experimental do autoaquecimento de materiais viscoelásticos / Computational modeling and experimental validation of self-heating effects in viscoelastic materials
Neste trabalho foi desenvolvida uma metodologia de simulação numérica do fenômeno de auto-aquecimento, tendo como objetivo a realização e a validação de um modelo a ser aplicado à predição do comportamento termomecânico de estruturas incluindo materiais viscoelásticos. O modelo de elementos finitos proposto leva em conta a dependência das propr
Publicado em: 2010
-
9. Proposição, avaliação numérica e experimental de um absorvedor dinâmico de vibrações multimodal / Proposal, Numerical and Experimental Evaluation of a Multimodal Vibration Dynamic Absorber
Dynamic Vibration Absorbers (DVA) have been widely used for passive control of structural vibrations. In their simplest configurations, those devices have their mitigation capacity confined to narrow frequency bands, which limits, to a large extent, their practical effectiveness. In this work, it is proposed a methodology for the optimal design of a multimod
Publicado em: 2009
-
10. Controle de estruturas flexíveis levando em conta o projeto simultâneo da estrutura e do controlador / Flexible structures control considering the simultaneous design of structure and controller
This work proposes techniques for the design of smart structures, that is, those structures that consider simultaneously the design of some of its parameters and the design of the controller. This type of approach allows to find a global design that will result either in a structure without the active controller requirement (i.e. a passive design) or the opt
Publicado em: 2009
-
11. Reduction of structural vibration induced by solar array drive mechanisms using input shaping control techniques / Redução de vibrações estruturais induzidas pelo mecanismo de acionamento da asa de painéis solares, usando a técnica de formatação do sinal de entrada
The input shaping technique was employed in this work to reduce the vibration effect at a flexible beam, caused by a step motor actuator. The technique is based on the cancellation of poles of the system by allocating zeros on or near poles. The switching sequence of the step motor was designed in a strategic way so that the vibration produced by the train o
Publicado em: 2008
-
12. Structural vibration control using piezoceramics in extension and shear connected to hybrid active-passive circuits / Controle de vibrações estruturais usando cerâmica piezoelétricas em extensão e cisalhamento conectadas a circuitos híbridos ativo-passivos
Esta dissertação apresenta uma análise numérica do controle de vibrações estruturais através de cerâmicas piezoelétricas em extensão e em cisalhamento conectadas a circuitos ativo-passivos compostos por resistência, indutância e fonte de tensão. Para tal, um modelo de elementos finitos de vigas sanduíche com três camadas elásticas e/ou piezoe
Publicado em: 2008