Nowadays it is commonly considered that high damping materials which have both the good mechanical properties as structural materials and the high damping capacity for vibration damping are the most direct vibration damping solution. In metals and alloys however, exhibiting simultaneously high damping capacity and good mechanical properties has been noted to be normally incompatible because the...

Structural vibration mitigation using semiactive control strategies has received special attention recently due to the attractive properties of semiactive devices. The main restriction of a semiactive device is that it can only produce dissipative forces, which may be expressed in mathematical terms as a nonlinear inequality constraint. Standard active control algorithms do not generally accoun...

The impedance spectrum presented by the PEP-I1 RF cavity to the beam is calculated using a 3D MAFIA model which includes the damping waveguides and the input coupler. The simulation assumes that all the ports leading out of the cavity, including the beam pipes, are terminated in matched loads. The effect of the external loading on the longitudinal impedances will be examined. This study takes i...

The impedance spectrum presented by the PEP-II RF cavity to the beam is calculated using a 3D MAFIA model which includes the damping waveguides and the input coupler. The simulation assumes that all the ports leading out of the cavity, including the beam pipes, are terminated in matched loads. The effect of the external loading on the longitudinrd impedances will be examined. This study takes i...

Expressions for piezoelectric inductive-resistive shunt tuning to a targeted structure mode are obtained by explicit frequency response functions, derived from combined short- and open-circuit modal representation that accounts inherent structural damping. The influence of external loading is further included accounting the short-circuit dynamic quasi-static contributions modes below above targ...

As the world’s need for renewable energy has grown in recent years, possibility of creating and collecting deep-sea wind become a research hotspot. Floating turbines damping devices to provide stable working state structural safety. Damping systems are often used offshore floating constructions based on various operating principles locations. technology sorts is continually being researched dem...