A Study on Application of Wave Inputs to Ship Design

Abstract

From a viewpoint of ship design, wave properties which are closely related to practical prediction of statistical ship responses and wave loads, were studied by making use of results from wave measurements and observations on the North Pacific and the West Pacific Ocean. The measured results were analyzed by means of spectral analysis. The analyzed results were compared with the results of visual observation on board and with those measured and observed on the North Atlantic Ocean. The estimated wave spectra were normalized and the spectral form thus obtained was compared with that of Pierson-Moskowitz type wave spectrum. Furthermore, influences of wave properties and spectral form on the practical accuracy of statistical prediction of ship rcsponses in rough seas were discussed by quoting an example of typical design problem. The above wave measurements and observations were carried out using throw-in type wave meters which had been developed through the sponsorship of SR-132 Committee of J.S.R.A..