On the Geometrical Non-Linearities of the Ship Load Expressions

In the structural analysis a fundamental rule is played by the internal forces and moments: they are the only variables on which the study for the primary level of the ship structural response is based, in accordance with beam theory. First of all, based on the usual decomposition of loads general expressions for the distributed still water, inertial and restoring loads have been revisited. Additionally, the influence of the non-linearity arising from the hull geometry on loads has been studied. Particular attention has been also given to the evaluation of loads due to the dynamic pressure in wave. Finally, two numerical examples have been carried out in order to verify the aforementioned influence on loads. The results obtained have been particularly discussed.