Overview
Modelling of diffraction and radiation effects on large offshore support structure, using Boundary Element Method hydrodynamics.
The Advanced Hydrodynamics module allows both first- and second-order hydrodynamic loading on the structure to be calculated from a set of hydrodynamic body properties obtained using a boundary element method (BEM) flow solver code. This is particularly important when modelling offshore fixed or floating support structures where the size or shape of the member means that Morison elements are not sufficient. This allows the calculation of both diffraction and radiation effects.
The support structure can be represented as a single hydrodynamic body or as a collection of bodies connected using a flexible modal frame.
Any commercial flow solver may be used to provide the hydrodynamic properties provided it produces the required outputs, but Bladed includes a tool for importing flow solver properties from WAMIT, AQWA and WADAM, including the sum- and difference-frequency QTF information needed for second-order load calculations.
Workflows where the platform structural analysis can be performed using Bladed inputs in Sesam are also supported.
The mesh used for the BEM flow solver code