| Popis: |
Transportation studies in unidirectional waves are usually thought to provide a conservative approach to the design of jacket structures and their sea-fastenings. Model tests in multidirectional waves have, however, shown that the presence of directional spread sometimes increases motions, accelerations, and loads. This conclusion is supported by computer calculations using the NMI Wave diffraction and motions program, and can largely be explained by linear seakeeping theory. Several distinct causes have been identified. |
