A non-linear model of an adjustable automotive damper is developed, which includes the compressibility of the ̄uid, trapped gas and expansion of the cylinder. The parameters for the model are selected by ®tting the model to experimentally obtained data from the damper. The model is shown to give an excellent representation of the damper under investigation. The performance of the damper model i...

the present article seek to investigate the function of elliptical steel damper function in steel frames seismic resisting. the elliptical damper is a kind of earthquake energy dissipater in structure which acts based on the steel yielding feature. thus, this damper in frame lateral displacement mechanism is expected to have a satisfying hysteretic behavior in terms of energy absorption is on a...

additional dampers are employed in order to decrease the dynamic response of structure against the earthquake and wind loading recently. in this study, two types of systems related to waste of inactive energy, i.e. frictional damper which is categorized in dampers dependent on movement and viscoelastic damper which is categorized in dampers dependent on velocity, in making steel structures resi...

During the earthquake phase, dampers were used to dissipate energy as well stop Deformation of Structure. We may reduce buckling and failure columns beams by increasing stability frame with help dampers. earthquakes, high-rise buildings are destroyed, there is significant deformation. shaking reinforcement cement concrete structures during an using various types in this analysis determine suita...

The aim of this study was to validate different theoretical performance models using subscale wave tank tests. The device modeled is a heaving point absorber working against a submerged reaction plate. This type of device has been pursued by a number of commercial and is therefore relevant as a benchmark for future efforts on similar devices. A set of model tests were carried out at 1:33 scale ...

This paper outlines a mathematical framework to determine the upper bound on extractable power as a function of the forcing vibrations. In addition, the method described provides insight into the dynamic transducer forces required to attain the upper bound. The relationship between vibration parameters and transducer force gives a critical first step in determining the optimal transducer archit...

In a damage avoidance design perspective, seismic rocking of rigid-like blocks, such as masonry walls, precast r.c./timber panels, art objects, etc., can be controlled through viscous elastic dampers. This paper discusses how to perform risk assessment walls undamped and damped by viscous-elastic dampers installed at the top them. Firstly, preliminary fragility analysis allows understanding rol...

Title of Dissertation: DEVELOPMENT OF MAGNETORHEOLOGICAL FLUID ELASTOMERIC DAMPERS FOR HELICOPTER STABILITY AUGMENTATION Wei Hu, Doctor of Philosophy, 2005 Dissertation directed by: Professor Norman M. Wereley Department of Aerospace Engineering Conventional lag dampers use passive materials, such as elastomers, to dissipate energy and provide stiffness, but their damping and stiffness levels d...