抄録
In this study, to gain an assessment referring to the number of waves of irregular wave used in the laboratory tests, the influence of wave signal length on the damage level of armour layer is investigated by the experiments. Furthermore, the statistical properties of the high wave and its wave grouping relating to the damage of armour layers are investigated by changing the wave signal length.
The appearance probability of high wave exceeding the critical wave height that brings about the damage of armour model has been analyzed using the Rayleigh distribution. It may be found from this analysis and experiments that 600 waves give a tentative criterion for the number of waves of irregular wave train used in the laboratory tests. Furthermore, to explore a better insight into the criteria for the number of waves, statistical evaluations of the run length of the high wave exceeding the critical wave height in every irregular wave train are provided.
