Estimation of wind sea and swell using shipboard measurements – A refined parametric modelling approach

Montazeri, Najmeh; Nielsen, Ulrik Dam; Jensen, Jørgen Juncher

doi:10.1016/j.apor.2015.11.004

Cited by 44 publications

(42 citation statements)

References 17 publications

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“…Three responses: vertical motion at the port side of the midship section, pitch motion and wave induced vertical bending moment at midship section are used for estimation of the sea state. In this study, cross spectral analysis, [3], is not implemented.…”

Section: Wave Estimation Methodsmentioning

confidence: 99%

“…The optimisation of the sea state parameters is carried out through the spectral moments of the responses spectra. For complete description of the estimation procedure, see [3]. The basic cost function for estimation of a simplified short crested unimodal wave spectrum using one specific response can be written as:…”

Section: Wave Estimation Methodsmentioning

confidence: 99%

“…Following the procedure in Sec. II and [3] the wave parameters of the considered cases are estimated using vertical motion, pitch and vertical bending moment as mentioned before. These parameters are used as input to the JONSWAP spectrum and the uncertainties are calculated from Eq.(10).…”

Section: ∂Smentioning

confidence: 99%

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Uncertainties in ship-based estimation of waves and responses

Montazeri

Jensen

Nielsen

2015

OCEANS 2015 - MTS/IEEE Washington

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Abstract-Real time estimation of waves and ship responses using onboard measurements has been under investigation in recent years. This has been done using different methods, including parametric and non-parametric models. Since none of the methods are believed to be fully accurate, it is important to assign an uncertainty measure to the waves and responses that are being estimated. In this paper, a parametric model approach based on moments of responses is considered for wave estimation. A method based on linear error propagation is introduced to assess the uncertainty of wave estimations. The uncertainty of response calculation based on the estimated wave is also quantified.

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Section: Wave Estimation Methodsmentioning

confidence: 99%

Section: Wave Estimation Methodsmentioning

confidence: 99%

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Uncertainties in ship-based estimation of waves and responses

Montazeri

Jensen

Nielsen

2015

OCEANS 2015 - MTS/IEEE Washington

Self Cite

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“…The left-hand side of Eq. (1) is measured in encounter frequency domain whereas the right-hand side is the theoretical spectra calculated in wave frequency domain [9].…”

Section: Moment-based Wave Estimationmentioning

confidence: 99%

“…The wave estimation method used in this paper is based on the approach in [9,10]; a study on optimisation of parametric wave spectrum through the spectral moments of ship responses. Analysis of full-scale measurements of a large in-service container ship is carried out herein as a case study for the presented estimation and prediction approaches.…”

Section: Introductionmentioning

confidence: 99%

Trend modelling of wave parameters and application in onboard prediction of ship responses

Montazeri

Nielsen

Jensen

2015

OCEANS 2015 - MTS/IEEE Washington

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Abstract-This paper presents a trend analysis for prediction of sea state parameters onboard ships during voyages. Given those parameters, a JONSWAP model and also the transfer functions, prediction of wave induced ship responses are thus made. The procedure is tested with full-scale data of an in-service container ship. Comparison between predictions and the actual measurements, implies a good agreement in general. This method can be an efficient way to improve decision support onboard ships.

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Measurement of Sea Waves

Piscopo

Rossi

Crenna

et al. 2022

Measurement for the Sea

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This chapter focuses on the analysis and measurement of sea waves. After a brief review about the generation and propagation of ocean waves, the most common wave spectra are briefly described. Subsequently, the spectral analysis of sea waves is discussed focusing on the most promising techniques that allow obtaining the sea state parameters starting from the wave elevation time history. Finally, two techniques useful to measure the sea wave parameters are outlined. The former is based on the reverse analysis of the motions a ship advancing at a constant speed in a seaway, and the latter focuses on the employment of coastal high-frequency radars.

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Estimation of wind sea and swell using shipboard measurements – A refined parametric modelling approach

Cited by 44 publications

References 17 publications

Uncertainties in ship-based estimation of waves and responses

Uncertainties in ship-based estimation of waves and responses

Trend modelling of wave parameters and application in onboard prediction of ship responses

Measurement of Sea Waves

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