Estimation of wind sea and swell using shipboard measurements – A refined parametric modelling approach. (January 2016)

• Record Type: Journal Article
• Authors: Montazeri, Najmeh; Nielsen, Ulrik Dam; Juncher Jensen, Jørgen
• Is Part Of: Applied ocean research. Volume 54(2016:Jan.)
• Page Start: 73
• Page End: 86
• Publication Date: 2016-01
• Subjects: Sea state estimation -- Shipboard measurements -- Parametric method -- Wind sea -- Swell; Ocean engineering -- Periodicals; 620.416205
• DOI: 10.1016/j.apor.2015.11.004
• Languages: English
• ISSNs: 0141-1187

Abstract

Abstract : Highlights: A method for estimation of wind sea and swell using ship responses is proposed. The estimation method is based on JONSWAP model for double-peaked spectra. The estimated main integral parameters of waves are fairly close to the true values. Abstract: Shipboard wave estimation has been of interest in recent years for the purpose of decision support. In this paper, estimation of sea state is studied using ship responses and a parametric description of directional wave spectra. A set of parameters, characterising a given wave spectrum is estimated through an optimisation problem using global search basin with proper constraints. The cost function is established based on the difference between the energies of a set of measured ship responses and the corresponding theoretical spectral moments. A partitioning procedure is applied, which is able to separate swell components from wind seas.