Correlation between Wave Pressures and Water Surface Elevations for Irregular Waves

Abstract

This study aims to develop efficient methods for an estimation of wave pressures under irregular waves by using time series of water surface elevations. Two methods are presented in this study. One is a linear filter approximation method which is extended from an original way to calculate water particle velocities from the water surface elevations. The other one is a local approximation method which is also extended from an original way to obtain non linear water surface elevations by using time series of subsurface pressures. The validity of each method is verified comparing with experimental results for simultaneous measurements of water surface elevations and subsurface pressures under progressive and standing irregular waves in 2-D wave flume.