It is possible to estimate on-site wave spectra using measured ship responses applied to Bayesian Modelling based on two prior information: the wave spectrum must be smooth both directional-wise and frequency-wise. This paper introduces two hyperparameters into Bayesian Modelling and, hence, a proper formulation of ABIC (a Bayesian Information Criterion) is given, in contrast to the improper formulation given of ABIC when only one hyperparameter is included. From a numerical example, the paper illustrates that the optimum pair of hyperparameters, determined by use of ABIC, corresponds to the best estimate of the wave spectrum. In addition, full-scale motion measurements are analysed and the estimated wave spectra are compared with estimations made by wave radar measurements and satellite measurements. The agreement is reasonable.
|Title of host publication||10th International Symposium on Practical Design of Ships and Other Floating Structures|
|Publication status||Published - 2007|
|Event||10th International Symposium on Practical Design of Ships and Other Floating Structures - Houston, TX, United States|
Duration: 1 Oct 2007 → 5 Oct 2007
Conference number: 10
|Conference||10th International Symposium on Practical Design of Ships and Other Floating Structures|
|Period||01/10/2007 → 05/10/2007|