TOTAL ANALYSIS SYSTEM FOR SHIP STRUCTURAL STRENGTH

This paper outlines a total analysis system for ship hull structures. It integrates a wide variety of analysis functions to realize practical applications of rational methods in the assessment of ship structural strength. It is based on direct calculations of wave-induced load as well as three-dimensional structural analysis of an entire ship or hold structure. Three major analysis functions of the total system are ship motion and wave load analysis, ship structural analysis and statistical analysis. In addition to these major functions it is essential for realization of a wave-induced response analysis of an entire ship structure to develop a powerful load translator, which can effectively link a hydrodynamic analysis model to a structural analysis model. The load translator is multifunctional in order to be capable of dynamic load generation of liquid, granular and container cargos and ballast waters as well as wave pressure conversion in both frequency and time domains. Pointed out are some practical and essential features that are to be resolved when performing such a total analysis using three-dimensional ship structural analysis. Typical examples of its practical application to double hull tankers and large container carriers are shown.