Page 66 - Marine Structural Design
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Chapter 3 Loads and Dynamic Response for qshore Structures             43


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                                             -W156          W391

                            Figure 3.3   Wave Directional Probabilities (Zhao, Bai & Shin, 2001)




















                            Figure 3.4   Wave grid of A Wave Database and Two Sample Service
                                        Routes (Zhao, Bai & Shin, 2001)


                 An example of a two-dimensional wave scatter diagram for the Northern North Sea is shown
                 in Table 3.1.
                 A wave scatter diagram provides a long-term wave description for only one specific region. In
                 order  to  assess  the  fatigue  damage  for  a  ship  on  past  service,  it  is  necessary  to  obtain
                 additional wave information along the routes.  For this purpose, a global wave database can be
                 used, from which wave data for any wave zone on the service route can be retrieved.
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