TY - GEN
T1 - Abnormal Waves Modelled as Second-order Conditional Waves
AU - Jensen, Jørgen Juncher
PY - 2005
Y1 - 2005
N2 - The paper presents results for the expected second order short-crested wave conditional of a given wave crest at a specific point in time and space. The analysis is based on the second order Sharma and Dean shallow water wave theory. Numerical results showing the importance of the spectral density, the water depth and the directional spreading on the conditional mean wave profile are presented. Application of conditional waves to model and explain abnormal waves, e.g. the well-known New Year Wave measured at the Draupner platform January 1st 1995, is discussed. Whereas the wave profile can be modelled quite well by the second order conditional wave including directional spreading and finite water depth the probability to encounter such a wave is still, however, extremely rare. The use of the second order conditional wave as initial condition to a fully non-linear three-dimensional analysis is suggested as computational efficient procedure for the analysis of extreme wave events.
AB - The paper presents results for the expected second order short-crested wave conditional of a given wave crest at a specific point in time and space. The analysis is based on the second order Sharma and Dean shallow water wave theory. Numerical results showing the importance of the spectral density, the water depth and the directional spreading on the conditional mean wave profile are presented. Application of conditional waves to model and explain abnormal waves, e.g. the well-known New Year Wave measured at the Draupner platform January 1st 1995, is discussed. Whereas the wave profile can be modelled quite well by the second order conditional wave including directional spreading and finite water depth the probability to encounter such a wave is still, however, extremely rare. The use of the second order conditional wave as initial condition to a fully non-linear three-dimensional analysis is suggested as computational efficient procedure for the analysis of extreme wave events.
M3 - Article in proceedings
T3 - 2005 Conference and Training Programme
SP - 39
EP - 45
BT - Design and Operational for Abnormal Conditions III
PB - The Royal Institution of Naval Architects
T2 - Design and Operational for Abnormal Conditions III
Y2 - 1 January 2005
ER -