To conduct a ship structural response analysis, it is very important to estimate correctly the wave force in strong nonlinear phenomena. Therefore, a method for a ship structural response analysis is proposed. The pressure distribution making the large ship motion with slamming is directly simulated by computational fluid dynamics, and the ship structural analysis is calculated using this pressure distribution. This paper reports the calculation method of the pressure acting on a hull as the first report. The proposed calculation method is validated by simulation of a forced oscillation test in waves.
In recent years, the marine transportation volume has been significantly increasing. Ships are upsized to handle the massive quantity of maritime transportation. To meet this trend, large container ships, which are capable of carrying in excess of 10,000 TEU, have appeared. Such container ships generally have a large bow flare. As a result, the stiffness of large container ships coming into service has become relatively low. It is a concern that whipping or springing from slamming loads on the bow flare has an effect on the ship structural response. Therefore, to conduct an accurate ship structural analysis, it is very important to estimate correctly the wave force in strong nonlinear phenomena. As the calculation method of the hydroelastic response in nonlinear problems, the nonlinear strip method was extended to deal with the non linearity of the time domain. Proposed by Yamamoto, Fujino and Fukasawa (1978a, 1978b, 1979), the nonlinear strip method is also useful for the hydroelastic response in a strong nonlinear phenomenon such as slamming. The ship motion and the wave load can be calculated to be accurate with the nonlinear strip method. However, the nonlinear strip method cannot calculate the pressure distribution acting on a hull.
