This paper is concerned with the free and forced vibration responses of a magneto/electroactive dielectric elastomer, emphasizing chaotic phenomena. The elastomers under external magnetic electrical excitations undergo large elastic deformation. magnetodielectric elastomer modeled based on Gent–Gent strain energy function to incorporate influence second invariant stiffening. viscoelasticity act...

Elastic structures of buildings and machines, the dynamic behavior mathematical model which is problem longitudinal vibrations rods, are widespread in modern technology. In this regard, study issues related to rods also an urgent currently. terms solving such problems, we considered formulation (free forced) vibration obtained spectra natural frequencies ω n own forms φ (x) vibration, u(x, t) –...

The issues surrounding the use of ambient vibration modes for the location of structural damage via dynamically measured flexibility are examined. Several methods for mass-normalizing the dynamic mode shapes extracted from ambient modal data are implemented and compared. The methods are applied to data from a series of ambient modal tests on an actual highway bridge. The results indicate that t...

Comfort, reliability, functionality performance which provide a longer life cycle requires thourogh understanding and analysis of the vibrations, this is a general rule for most of the static and dynamic when studying the functionality performance of any application. Vibrations is an extremely important issue to consider when designing various systems.The hysteresis in the dampers is very impor...

The dynamic responses of membrane are completely dependent on Pre-tensioned forces which are applied over a boundary of arbitrary curvilinear shape. In most practical cases, the dynamic responses of membrane structures are undesirable. Whilst they can be designed as vibration-based energy harvesters. In this paper a smart flat membrane sheet (SFMS) model for vibration-based energy harvester is ...

1. Abrams, Daniel Strogatz, Steven H. Cornell University McRobie, Allan Cambridge University A Coupled Oscillator Model of the Millennium Bridge Instability On June 10, 2000, London's new footbridge across the Thames opened to great acclaim. Within 48 hours authorities were forced to close the bridge, citing a dangerous lateral vibration induced by the large crowds. Using methods taken from mat...