Application of Gaussian wave packets for seakeeping tests of offshore structures

Abstract

Describes how a Gaussian modulated amplitude spectrum can be used in sea keeping tests of a semisubmersible and a crane vessel. The Gaussian wave packets are characterized by the amplitude function at various locations and by the accompanying Fourier spectra. Shows for the semisubmersible RS tests, that the transfer functions for the Gaussian wave train technique are not as distorted as those using a Fourier spectral approach. Tests with the crane semisubmersible DB 102 indicate use of the Gaussian wave packet technique is valid providing appropriate wave packets are selected. (C.J.U.)