Blar i Institutt for marin teknikk på forfatter "Nielsen, Ulrik Dam"
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Sea state estimation using multiple ships simultaneously as sailing wave buoys
Nielsen, Ulrik Dam; Brodtkorb, Astrid H.; Sørensen, Asgeir Johan (Journal article; Peer reviewed, 2019)The article presents initial ideas towards a network-based approach for sea state estimation used for marine operations and other maritime applications. In principle, all available means, ranging from in situ buoys, fleet ... -
Sea state estimation using vessel response in dynamic positioning
Brodtkorb, Astrid H.; Nielsen, Ulrik Dam; Sørensen, Asgeir Johan (Journal article; Peer reviewed, 2018)This paper presents a novel method for estimating the sea state parameters based on the heave, roll and pitch response of a vessel conducting station keeping automatically by a dynamic positioning (DP) system, i.e., without ... -
Ship motion-based wave estimation using a spectral residual-calculation
Nielsen, Ulrik Dam; Brodtkorb, Astrid H. (Chapter, 2018)This paper presents a study focused on a newly developed procedure for wave spectrum estimation using wave-induced motion recordings from a ship. The particular procedure stands out from other existing, similar ship ... -
Simultaneous sea state estimation and transfer function tuning using a network of dynamically positioned ships
Mounet, Raphaël Emile Gilbert; Nielsen, Ulrik Dam; Brodtkorb, Astrid H.; Tannuri, Eduardo A.; de Mello, Pedro C. (Peer reviewed; Journal article, 2022)This paper presents a study focused on wave spectrum estimation in practical scenarios where multiple ships operate in the same geographical area, potentially forming a network of wave recorders. A novel methodology is ... -
Spatio-temporal variation in sea state parameters along virtual ship route paths
Nielsen, Ulrik Dam (Peer reviewed; Journal article, 2021)The article presents a study investigating the level of variation in sea state parameters encountered by sailing ships crossing the oceans. The sea state parameters have been obtained from a reanalysis, in this case the ... -
Tuning of transfer functions for analysis of wave–ship interactions
Nielsen, Ulrik Dam; Mounet, Raphaël Emile Gilbert; Brodtkorb, Astrid H. (Peer reviewed; Journal article, 2021)Transfer functions are often used together with a wave spectrum for analysis of wave–ship interactions, where one application addresses the prediction of wave-induced motions or other types of global responses. This paper ... -
Validation and correction of auto-logged position measurements
Ikonomakis, Angelos; Nielsen, Ulrik Dam; Holst, Klaus Kähler; Dietz, Jesper; Galeazzi, Roberto (Journal article; Peer reviewed, 2022)