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Calculation of Wave Forces on Gravity Platforms and Submerged Tunnels

The general method of Chapter 10 for calculating the largest wave forces on large isolated bodies of arbitrary shape is applied. This method (being based on QD theory and SSFEs) is much simpler than the commonly applied methods using Green's functions, which are summarized in the conclusive notes to the chapter. The first part of the chapter deals with an estimate of the largest wave loads on a gravity offshore platform, in a design sea state. A worked example is given, and a FORTRAN program is supplied that calculates the resultant wave force as a function of time. The second part of the chapter deals with an estimate of the largest wave loads on a submerged tunnel, in a design sea state. Here too, a worked example is given and a FORTRAN program is supplied. This program gives the distributions of the wave force per unit length, at a number of time instants, during the transit of the wave group of the maximum expected wave height.


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