PROBABILISTIC MODEL FOR WAVE-FORCES ACTING ON A CYLINDER IN RANDOM WAVES

Generally, the sea-state (random waves) is best described by a wave spectrum. A number of statistical models for wave spectra has been well established and a sea-state can be specified. Once the specified sea-state is established, the corresponding model for wave forces acting on a single cylinder or a group of cylinders can be formulated. Since peak force is of more practical value, a multivariate or joint probability density function for wave forces has been developed for the peak force distribution of wave forces. This theoretical force model derives the tri-variate probability density function P(F, F', F), where F is the peak force defined by Morison equation. This model is of wide-band in nature and is tested by wave flume experiments.