Abstract
The air turbine installed in the oscillating water column type wave energy converter is analyzed linearizing in order to usually work as nonlinear load. On the other hand, it is possible solving directly nonlinear characteristic in more detailed analysis, and the nonlinear time series analysis using the impulse response function is performed. The advantage of the formation of equivalent linearization is treatment by the frequency domain, and is that statistical processing is possible, there are few amounts of calculation, and a solution is uniquely determined to an irregular wave. In this paper the error treated by the formation of equivalent linearization is validated by comparison with the nonlinear time series analysis for the orifice which is of nonlinear load damping.
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