hal-03263362
https://hal.science/hal-03263362
https://hal.science/hal-03263362/document
https://hal.science/hal-03263362/file/preprint.pdf
[UNIV-BREST] Université de Bretagne occidentale - Brest (UBO)
[ENSTA-BRETAGNE] ENSTA Bretagne
[CNRS] CNRS - Centre national de la recherche scientifique
[UNIV-UBS] Université de Bretagne Sud
[IFREMER] IFREMER - Institut français de recherche pour l'exploitation de la mer
[UBS] Université de Bretagne Sud
[ENIB] Ecole Nationale d'Ingénieurs de Brest
[IRDL] Institut de Recherche Dupuy de Lôme - CNRS FRE 3744
[ENSTA-BRETAGNE-MECA] Département Mécanique
[TEST-HALCNRS] Collection test HAL CNRS
[ENSTA-BRETAGNE-PTR3-IRDL] ENSTA-BRETAGNE-PTR3-IRDL
Effect of forward speed on the level-crossing distribution of kinematic variables in multidirectional ocean waves
Hascoët, Romain
Raillard, Nicolas
Jacques, Nicolas
[PHYS.MECA.MEFL] Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph]
UNDEFINED
water wave
Gaussian
level crossing
Doppler effect
forward speed
slamming
The influence of forward speed on stochastic free-surface crossing, in a Gaussian wave field, is investigated. The case of a material point moving with a constant forward speed is considered; the wave field is assumed stationary in time, and homogeneous in space. The focus is on up-crossing events, which are defined as the material point crossing the free surface, into the water domain. The effect of the Doppler shift (induced by the forward speed) on the up-crossing frequency, and the related conditional joint distribution of wave kinematic variables is analytically investigated. Some general trends are illustrated through different examples, where three kinds of wave direction distribution are considered: unidirectional, short-crested anisotropic, and isotropic. The way the developed approach may be used in the context of slamming on marine structures is briefly discussed.
2021-06-17
2021-06-17
en