Data analysis

Wave data with turning points, 
i.e. local maxima and minima. Local maxima (=crests) and local minima (= troughs) are identified in a recorded wave data series. These form the turning points, which can be extracted and analysed further to give wave cycles, wave lengths, amplitudes, etc.

Rainflow cycles are identified; 
small cycles can be removed. Rainflow cycles are identified. Small cycles can be removed by means of rainflow filtering. The figure shows rainflow cycles with amplitude exceeding one standard deviation of the wave data.

A cycle plot shows pairs of maxima 
and minima. A cycle plot shows pairs of maxima and minima as points in the plane.

WAT examples