Browsing NTNU Open by Author "Alsos, Hagbart Skage"
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3D motion dynamics of axisymmetric bodies falling through water
Alsos, Hagbart Skage; Faltinsen, Odd Magnus (Journal article; Peer reviewed, 2018)A new simplified method for analysis of 3D motion dynamics of axisymmetric slender bodies falling from air through water is presented. Slender-body theory for potential flow of incompressible water is combined with 2D + t ... -
Effect of modelling inhomogeneous wave conditions on structural responses of a very long floating bridge
Dai, Jian; Stefanakos, Christos; Leira, Bernt Johan; Alsos, Hagbart Skage (Peer reviewed; Journal article, 2021)Floating bridges are suitable for connecting land parcels separated by wide and deep waterbodies. However, when the span of the crossing becomes very long, the water environment exhibits inhomogeneities which introduce ... -
Effect of wave inhomogeneity on fatigue damage of mooring lines of a side-anchored floating bridge
Dai, Jian; Leira, Bernt Johan; Moan, Torgeir; Alsos, Hagbart Skage (Peer reviewed; Journal article, 2020)Mooring systems are important structural components of very long floating bridges. They effectively limit the transverse motions of the bridge under environmental loads. They also add viscous hydrodynamic damping to the ... -
Evaluation of Nonlinear Material Behavior for Offshore Structures Subjected to Accidental Actions
Amdahl, Jørgen; Storheim, Martin; Alsos, Hagbart Skage (Journal article; Peer reviewed, 2018)Evaluation of the nonlinear structural response of any structure is a challenging task; a range of input parameters are needed, most of which has significant statistical variability and the evaluations require a high degree ... -
Hydroplastic response of a square plate due to impact on calm water
Abrahamsen, Bjørn Christian; Alsos, Hagbart Skage; Aune, Vegard; Fagerholt, Egil; Faltinsen, Odd Magnus; Hellan, Øyvind (Peer reviewed; Journal article, 2020)This paper investigates large, plastic deflections of a square plate due to impact on calm water. Most research in the area has examined linear elastic structural responses to such impact, but hydrodynamic responses during ... -
On Common Research Needs for the Next Generation of Floating Support Structures
Aksnes, Vegard Øgård; Alsos, Hagbart Skage; Bachynski-Polic, Erin Elizabeth; Berthelsen, Petter Andreas; Delhaye, Virgile Roger; Furevik, Birgitte Rugaard; Jostad, Hans Petter; Kristiansen, Trygve; Ommani, Babak (Chapter, 2022) -
Ship Grounding: Analysis of Ductile Fracture, Bottom Damage and Hull Girder Response
Alsos, Hagbart Skage (Doktoravhandlinger ved NTNU, 1503-8181; 2008:250, Doctoral thesis, 2008)The present work is concerned with problems related to grounding of ships. This ranges from prediction of fracture to analysis of hull girder loads during grounding. The thesis is composed as a collection of articles and ... -
Structural Response Analysis and Fatigue Damage Estimation of a Floating Bridge Subjected to Inhomogeneous Wave Loads
Dai, Jian; Leira, Bernt Johan; Moan, Torgeir; Alsos, Hagbart Skage (Chapter, 2020)In this paper, a computational study of the structural responses of a floating bridge for crossing of the Bjørnafjord in Norway is presented. The study employs an idealized floating bridge model developed based on the phase ...