Despite several wave energy converters (WECs) having been developed to present, no particular concept has emerged yet. The existing inventions vary significantly in terms of the operation principle and complexity WECs. tethered point absorbers (PAs) are among most known devices that, thanks their simplicity, appear be cost-effective reliable for offshore installation. These need advanced furthe...

The paper aims to design and simulation of a wave energy harvesting system commonly known as point absorber for Ennore port located in the coastal area Chennai, India. geographical condition India, which is surrounded by three sides with seas ocean, has enormous opportunity power production through system. converter device two-body floating its both parts are connected take-off unit acts spring...

Suppression of Random Vibration in Flexible Structures using a Hybrid Vibration Absorber M.H. Tso, J. Yuan, W.O. Wong Abstract A design method is proposed to suppress stationary random vibration in flexible structures using a hybrid vibration absorber (HVA). While the traditional vibration absorber can damp down the vibration mainly at the pre-tuned mode of the primary structure, active damping...

P.S. FROG is a bi-directional (dipole-like) point-absorber, consisting of a floating flap or paddle, facing the waves and reacting against them by means of a large interior moving mass housed in an enlar ed section at the bottom (Fig. l). The dynamics were reported in 1986(1) , but have since been simplified by formulating them in terms of the motion in surge of the centre of wave pressure. It ...

Gianluca Brando 1,*, Domenico Pietro Coiro 2, Marino Coppola 1, Adolfo Dannier 1, Andrea Del Pizzo 1 and Ivan Spina 1 1 Department of Electrical Engineering and Information Technology, University of Naples Federico II, Via Claudio 21, 80125 Naples, Italy; [email protected] (M.C.); [email protected] (A.D.); [email protected] (A.D.P.); [email protected] (I.S.) 2 Department of Indust...

Abstract: Passive vibration control solutions are often limited to working reliably at one design point. Especially applied to lightweight structures, which tend to have unwanted vibration, active vibration control approaches can outperform passive solutions. To generate dynamic forces in a narrow frequency band, passive single-degree-of-freedom oscillators are frequently used as vibration abso...

We propose a classification scheme for the circumnuclear medium of AGNs based on their location in the A V −N H plane (related to dust absorption and gas absorption, respectively). We present evidence that the A V /N H ratio is often lower than the Galactic value. This is shown by the broad line ratios of a sample of intermediate Seyferts, and by the optical/X–ray ratio of line selected (as opp...

In order to design and evaluate the behaviour of a numerically optimised wave energy converter (WEC), recommended procedure is initially study small scale models in controlled laboratory conditions then progress further up until full-scale reached. At any point, an important step correct selection theory model dynamical WEC. Most authors recommend based on dimensional parameters, which usually ...

The Chandra AO1 HETGS observation of the micro-quasar GRS 1915+105 in the low hard state reveals (1) neutral K absorption edges from Fe, Si, Mg, and S in cold gas, and (2) highly ionized (Fe xxv and Fe xxvi) absorption attributed to a hot disk, disk wind, or corona. The neutral edges reveal anomalous Si and Fe abundances which we attribute to surrounding cold material in/near the environment of...