In a structural analysis of a ship the first step is to determine the wave-induced loads on the hull. Of interest is both the extreme loads the hull will be exposed to during its lifetime as well as the load sequences which can led to fatique damages. The aim of the project is to develop methods to determine the statistical distribution of the extreme wave induced loads considering the non-linearities in the hydrodynamic loads, including slamming and green water. The waves will be described by stationary sea states weighted with different discrete and continous types of spreading. The load modelling will use the strip approach (2D) for analysis in the frequency domain as well as in the time domain. In the time-domain analysis methods will be used where the wave-signal consists of a deterministic average-wave-description superposed with a ordinary stochastic wave. The determination of the extreme values is expected to be more efficient than methods available. The hull is modelled as a non-prismatic Timoshenko beam and the combined stresses from bending and torsion is determined. The result of the project will on the basis of results from several ship types give proposals to the estimation of the design loads on ships and estimation of the influence of the different parameters.
|Effective start/end date||01/02/1996 → 31/01/1999|