Effects of hull damage on global loads acting on a trimaran ship

Abstract

This paper focuses on the calculation of global loads on a trimaran in intact and damage conditions. Validated numerical methods, including strip theory and panel method, are used to predict still water static and wave-induced dynamic loads acting on the intact and damaged ship in the frequency domain. The analysis is carried out using ShipX (VERES) and MAESTRO-Wave codes. Comparison of the results shows a good agreement, particularly in vertical loads. The results demonstrate that an imposed damage changes not only the distribution of global still water static loads, but also that of the global wave-induced dynamic loads. It is also observed that in some cases the loads acting on the undamaged cross sections increase considerably compared to the intact condition. This is due to the change in the distribution of loads acting on the ship under damage condition.