Abstract

In this paper, a nonlinear snap-through Power-Take-Off system is applied to a hemispherical wave energy converter oscillating in heave direction in regular waves. The nonlinear Power-Take-Off system is consisted of two symmetrically oblique springs and a linear damper, which is characteristic of negative stiffness and double-well potential. The dynamic response of the converter with nonlinear Power-Take-Off system is numerically calculated using 4th order Runge-Kutta method. Results shows that the nonlinear snap through mechanism, compared with linear mechanism, can enhance power capture of the converter, especially in low frequency regular waves.

Keywords:
oscillation, nonlinear snap-through power-take, pto system, sustainability, power capture, mechanism, sustainable development, characteristic, nonlinear converter, hemisphere
Subjects:
Environment, Sustainability/Social Responsibility, Sustainable development
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2014. International Society of Offshore and Polar Engineers
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