Browsing NTNU Open by Author "Lie, Halvor"
Now showing items 1-6 of 6
-
A Time-Domain Method for Hydroelastic Analysis of Floating Bridges in Inhomogeneous Waves
Fu, Shixiao; Wei, Wei; Ou, Shaowu; Moan, Torgeir; Deng, Shi; Lie, Halvor (Chapter; Peer reviewed, 2017)Based on the three dimensional potential theory and finite element method (FEM), this paper presented a method for time-domain hydroelastic analysis of a floating bridge in inhomogeneous waves. A floating bridge in both ... -
Data-Driven Prediction of Vortex-Induced Vibration Response of Marine Risers Subjected to Three-Dimensional Current
Riemer-Sørensen, Signe; Wu, Jie; Lie, Halvor; Sævik, Svein; Kim, Sangwoo (Chapter, 2019)Slender marine structures such as deep-water marine risers are subjected to currents and will normally experience Vortex Induced Vibrations (VIV), which can cause fast accumulation of fatigue damage. The ocean current is ... -
Dominant parameters for vortex-induced vibration of a steel catenary riser under vessel motion
Wang, Jungao; Fu, Shixiao; Larsen, Carl Martin; Baarholm, Rolf; Wu, Jie; Lie, Halvor (Journal article; Peer reviewed, 2017)Recent research has confirmed a new type of vortex-induced vibration (VIV) in steel catenary risers (SCRs), purely caused by vessel motion. Vessel motion-induced VIV occurs because the SCR is exposed to the equivalent ... -
Hydrodynamic modelling and estimating response of a glacial ice near a drilling rig
Ommani, Babak; Berthelsen, Petter Andreas; Lie, Halvor; Aksnes, Vegard Øgård; Løland, Geir (Chapter, 2019)Impact scenarios involving a typical drilling rig and glacial ice are studied. The goal is to better identify the important physical effects in modelling the dynamics of glacial ice in presence of waves and a floating ... -
On the significance of the higher-order stress in riser vortex-induced vibrations responses
Wu, Jie; Yin, Decao; Lie, Halvor; Larsen, Carl Martin; Baarholm, Rolf Jarle; Liapis, Stergios (Journal article; Peer reviewed, 2019)Vortex-induced vibrations (VIV) can lead to fast accumulation of fatigue damage and increased drag loads for slender marine structures. VIV responses mainly occur at the vortex shedding frequency, while higher harmonics ... -
Teknisk/økonomisk analyse av roterende kompensatorer: Et bidrag til effektiv utnyttelse av det norske sentralnettet
Lie, Halvor (Master thesis, 2008)Det er perioder behov for økt robusthet i sentralnettet. Kombinasjonen lav last med høy import gir kritisk lave kortslutningsverdier. Det kan føre til svært uheldige konsekvenser for driften av de to HVDC-omformerne i ...