A key component in bringing ocean wave energy converters from concept to commercialization is the building and testing of scaled prototypes to provide model validation. A one quarter scale prototype of an autonomous two body heaving point absorber was modeled, built, and tested for this work. Wave tank testing results are compared with two hydrodynamic and system models—implemented in both ANSY...

Fast sea transportation of passengers must considered safety and comfort requirements. Due to waves, there are heaving and pitching motions. These motions originate sea-sickness and can have negative effects on the ship. By means of submerged actuators, vertical motions can be smoothed. This paper considers the real case of a fast ferry with a T-foil and flaps. This is a control problem that al...

In this paper, we investigate the mutual hydrodynamic interactions between two different kinds of devices, namely, an Oscillating Wave Surge Converter modeled as an oscillating flap and a generic Heaving Wave Energy Converter modeled as a vertical truncated cylinder. A three-dimensional mathematical model based on linear potential flow theory is developed. It is assumed that the effects of the ...

An experimental investigation is reported of the unsteady forces d ue to heaving motion of fully wetted hydrofoils of unity aspect ratio and also in two-dimensiona l flow. The tests covered a broad range of reduced frequency and determined the effects of variation in submergence depth, angle of attack, oscillation amplitude, and flow velocity. In genera l, the findings agree well with available...

In tall buildings where there is heaving traffic, the service offered by multi-car lift systems is qualitatively sufficent. Besides, the lifts are expected to work fast, efficiently and without waiting and not affecting the activities of the building negatively. It has become possible to apply computer-based group control systems for the liftts to function with high performance quantitatively. ...