Large-scale laboratory experiments have been carried out to measured the total breaking wave force on a slender vertical and inclined pile. The main objective of this project is the validation of simplifying engineering approaches. In the first part of the paper, the sophisticated analysis program of the measured data to reach this goal is presented The analysis procedure consists of the estimation of the breaking point by the use of the Hilbert -^sTransformation of the measured water surface elevation, the breaker type definition due to the breaker tilt angle and the separation of the quasi-static and dynamic force. The validation of the Morison approach for shallow water breaking waves is made for a plunging and a collapsing breaker. The water particle velocity is approximated with a high order periodic wave theory and shows good results in the case of plunging breakers. The more pronounced asymmetry of collapsing breakers leads to poor agreement with measured data and to the recommendation that a periodic theory should not be used for the description of this kind of wave.
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