Response of a Small Array due to Irregular Waves: Comparison to Predictions Based on Measured Regular Wave Response (original) (raw)

Many studies have been published concerning numerical predictions of wave energy device and array responses in both idealised and realistic wave-fields. However, there are few comparisons of predicted array response to experimental measurements, particularly for irregular waves. Although time domain models are widely used for modelling the behaviour of isolated devices, the response of arrays has typically been predicted by assuming linear superposition of steady-state response to regular waves. In this experimental study, the validity of approaches based on linear theory is investigated for an isolated device and array of two devices at 4-and 3-radius centre-to-centre spacing. A range of regular wave frequencies over which response is linear with wave height is identified and these response measurements are used to predict time-varying response to an irregular wave. In irregular waves, the influence of previous wave cycles, the time required for the device to reach a steady respons...