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Mostrando ítems 21-30 de 2084
On the control of vibrations using synchrophasing
(2013-09-30)
This paper describes the application of a technique, known as synchrophasing, to the control of machinery vibration. It is applicable to machinery installations, in which several synchronous machines, such as those driven ...
MODE SATURATION, MODE COUPLING AND ENERGY HARVESTING FROM AMBIENT VIBRATION IN A PORTAL FRAME STRUCTURE
(Amer Soc Mechanical Engineers, 2014-01-01)
There has been much recent interest in the concepts of electro-mechanical systems that are able to scavenge, or harvest energy from their operating environment. Here, we present the extraction of energy from a simple portal ...
Mode saturation, mode coupling and energy harvesting from ambient vibration in a portal frame structure
(2014-01-01)
There has been much recent interest in the concepts of electro-mechanical systems that are able to scavenge, or harvest energy from their operating environment. Here, we present the extraction of energy from a simple portal ...
A Note on the Influence of Intermediate Restraints and Hinges in Frequencies and mode shapes of beams
(International Institute of Acoustics and Vibration, 2014-12)
This note deals with the free transverse vibration of a beam with two arbitrarily located internal hinges, four intermediate elastic restraints, and ends elastically restrained against rotation and translation. The method ...
Analysis of the vibrational spectrum of the dihydrogen complex [W(CO)3(n2-H2)(P{isopropyl}3)2]: A model for the vibrational spectrum of dihydrogen surface species
(Facultad Experimental de Ciencias de la Universidad del Zulia, 2011)
An approach to reduce vibration and avoid shimmy on landing gears based on an adapted eigenstructure assignment theory
(2020-01-01)
Landing gear shimmy is a self excited vibration phenomenon which must be avoided during aircraft design due to its potentially catastrophic behaviour. In a preliminary specification of structural properties of a landing ...
Zinc oxide nanoparticles with incorporated silver: Structural, morphological, optical and vibrational properties
(Elsevier, 2015)
Zinc oxide nanoparticles with different amounts of incorporated silver (ZnO:Ag; 0.6, 3, 6, and 9 at.% Ag) have been successfully synthesized by a simple sol gel method. The effect of Ag content on the properties of ZnO ...
An hp Adaptive Strategy to Compute the Vibration Modes of a Fluid-Solid Coupled System
(Tech Science Press, 2012-07)
In this paper we propose an hp finite element method to solve a two-dimensional fluid-structure vibration problem. This problem arises from the computation of the vibration modes of a bundle of parallel tubes immersed in ...