Reproduction of ocean waves for large-scale model seakeeping measurement: The case of coastal waves in Puerto Rico & Virgin Islands and Gulf of Maine

Abstract

The novel testing technique for ship seakeeping behavior, which includes conducting large-scale model trial in realistic sea waves, has been given special attention by naval architects in recent years. Large-scale model measurement provides obvious advantages in the investigation of ship hydrodynamics in many aspects. However, there still exist some challenges that need addressing to improve this kind of testing technique. One of the great challenges is the reproduction of full-scale ocean waves when conducting downscaled model experiments in natural sea environment. This paper aims to explore the possibility of reproduction of full-scale wave states in coastal sea areas. Criteria, such as significant wave height, mean period, spectral shape and directional spreading, are involved in the wave similarity judgment. Various factors including season, climate, model scaling, coastal space and time are taken into account to determine suitable waves for model measurement. The wave selection principle and methodology proposed in this paper are demonstrated through a case study using coastal wave data of the Puerto Rico & Virgin Islands and the Gulf of Maine.