DEVELOPMENT OF AN ONBOARD SYSTEM FOR WAVE DATA ANALYSIS AND APPLICATION TO SHIP OPREAT1ON

摘要

An onboard system for wave data analysis and application to ship operation is developed. The system consists of wave probes, accelerometers, a soft ware of wave directionality analysis and a wave data display tool. The former two are used to estimate the encountering wave surface elevations on ship hull. The wave directionality, i.e. the main wave direction and the directional wave spectrum, is calculated by using the encounter wave elevation data, applying various soft wares developed recently as Nonlinear Programming Method, Maximum Likelihood Method, etc. The significant wave height and wave period is determined simultaneously. The analyzed results are used to show the situation of own ship in the figures of operational guidance, so that the master can judge how to change the ship course or speed for preventing dangerous situations. This paper presents the research procedures for developing the system through numerical simulations and model experiments.