Experimental studies were carried out to investigate the possibility of utilization of auto-parametrically excited oscillation based on the Mathieu instability. For the simplicity, the subject is limited to the heaving motion of a spar-buoy type point absorber. The device consists of an inner cylinder and 12 outer cylinders. Each outer cylinder is equipped a movable floating column controlled by a ball screw mechanism and the buoyancy of the outer cylinders can be dynamically changed to induce the Mathieu instability. Based on results of the numerical simulation and the model tests, the possibility of utilization of auto-parametrically excited oscillation for WEC was shown.
Volume Subject Area:
Ocean Renewable Energy
Topics:
Buoys,
Oscillations,
Spar platforms,
Wing spars,
Cylinders,
Buoyancy,
Computer simulation,
Screws
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