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Results: Load RAOs |
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Results: Load RAOs |
These quantities are reported on the load RAOs (Haskind) and load RAOs (diffraction) sheets of the results tables. Both forms of load RAO are reported in body coordinates $\Bxyz$.
| Note: | The two forms are mathematically equivalent; they differ only because the integral equations have been solved using a discrete mesh. The difference between them can be a useful metric for the level of the discretisation errors in your results. Discretisation errors can be reduced by using a finer mesh. |
The load experienced by a body in degree of freedom $i$ in the incoming wave field, $\phi_I$, is calculated by pressure integration of the diffraction potential\begin{equation} F_i = -\textrm{i}\omega\rho \int_{\SB} (n_{\textrm{vel}})_i \phi_D \ud S \end{equation} A modified formula for diffraction load RAO holds in the presence of dipole panels.
The equivalent Haskind formula for the load RAO is calculated in terms of the incoming wave field, $\phi_I$, and the radiation potentials, $\phi_i$ \begin{equation} F_i = -\textrm{i}\omega\rho \int_{\SB} \left\{(n_{\textrm{vel}})_i\phi_I - \phi_i\PD{\phi_I}{n}\right\} \ud S \end{equation} A modified formula for the Haskind load RAO holds in the presence of a damping lid or dipole panels.