This Demonstration simulates a floating wave energy converter, which consists of a buoy containing a winch anchored to the bottom of the seabed by a cable.
The linear up and down motion of the buoy is converted into the rotational motion of the winch. The winch is spring-loaded and is connected to separate generators for each direction of its rotation, thus converting mechanical energy into electricity.
The equation of motion expresses the equilibrium of forces acting on the buoy: the downward force of gravity, the upward buoyancy, the upward drag force, and the up or down reactive torque of the winch that drives the generators.
For the wave motion, a periodic trochoidal wave model is used .
For a concrete example of a wave energy conversion project by similar buoys, see .