• Bilge keel induced roll damping of an FPSO with sponsons 

      Ommani, Babak; Fonseca, Nuno; Kristiansen, Trygve; Bakksjø, Hanne (ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering - Volume 1: Offshore Technology;Offshore Geotechnics;OMAE2016-54420, Chapter, 2016-06)
      The bilge keel induced roll damping of an FPSO with sponsons is investigated numerically and experimentally. The influence of the bilge keel size, on the roll damping is studied. Free decay tests of a three-dimensional ...
    • Calibration of a Time-Domain Numerical Hydrodynamic Model for Mooring Analysis of a Semi-Submersible 

      Fonseca, Nuno; Stansberg, Carl Trygve (ASME digital collection;OMAE2018-78753, Chapter, 2018-06-25)
      The paper presents calibration of a time domain numerical model for the motions of the Exwave Semi in high seastates with current. The time domain equations of motion combine linear radiation, linear diffraction and second ...
    • Committee I.2: Loads 

      Ogawa, Yoshitaka; Bai, Wei; de Hauteclocque, Guillaume; Dhavalikar, Sharad; Fang, Chih-Chung; Fonseca, Nuno; Hänninen, Satu; Johannessen, Thomas B.; Lien, Van; Morooka, Celso; Mumm, Holger; Prpic-Orsic, Jasna; Song, Kang Hyun; Tian, Chao; Ugurlu, Bahadir; Wang, Sue (Chapter, 2018-09)
      Concern for the environmental and operational loads from waves, wind, current, ice, slamming, sloshing, green water, weight distribution and any other operational factors. Consideration shall be given to deterministic and ...
    • Experimental and Numerical Study of the Free Surface Elevation Over the Pontoons of a Semisubmersible Platform in Waves 

      Pessoa, João; Stansberg, Carl Trygve; Fonseca, Nuno; Laranjinha, Manuel (ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering - Volume 1: Offshore Technology;OMAE2018-78009, Chapter, 2018-06-25)
      The region over the pontoons, especially in the vicinity of columns, is typically a critical area in terms of upwell when analyzing the air gap of semisubmersible platforms. There is indication that numerical computations ...
    • Experimental and Numerical Study on the Hydrodynamic Properties of a Simplified Floating Hydrocarbon Storage Facility 

      Zhang, Chi; Fonseca, Nuno; Magee, Allan R.; Ren, Nianxin (OMAE2019;96753, Chapter, 2019-06)
      A compliant modular floating hydrocarbon storage facility (FHSF) has been proposed for ocean space utilization. The FHSF consists of many floating hydrocarbon storage tanks (FHST) and several surrounding barges. These ...
    • Hydrodynamic Model Tests With a Large Floating Hydrocarbon Storage Facility 

      Fonseca, Nuno; Chi, Zhang; Rodrigues, José Miguel; Ren, Nianxin; Hellan, Øyvind; Magee, Allan R. (OMAE2019;96761, Chapter, 2019-06)
      The paper presents model tests with a floating hydrocarbon storage facility performed in SINTEF Ocean’s basin. The system may be considered a very large floating structure with a footprint of 300m × 310m. Hydrocarbons are ...
    • Identification of wave drift force QTFs for the INO WINDMOOR floating wind turbine based on model test data and comparison with potential flow predictions 

      Fonseca, Nuno; Thys, Maxime; Berthelsen, Petter Andreas (Peer reviewed; Journal article, 2021)
      The paper presents a comparison between empirical and numerical quadratic transfer functions (QTFs) of the horizontal wave drift loads on the INO WINDMOOR floating wind turbine. The empirical QTFs are determined from cross ...
    • LFCS Review report – Environmental loads Methods for the estimation of loads on large floating bridges 

      Fonseca, Nuno; Bachynski, Erin Elizabeth (SINTEF Ocean rapport;OC2018 A-073 - WP2, Research report, 2018-02)
      The document presents a review of state-of-the-art methods to calculate environmental loads on large floating bridges. It is a deliverable from WP2 of the Design and verification of Large Floating Costal Structures (LFCS) ...
    • Low Frequency Excitation and Damping of Four MODUs in Severe Seastates With Current 

      Fonseca, Nuno; Stansberg, Carl Trygve; Larsen, Kjell; Bjørkli, Rune; Vigesdal, Tjerand; Dalane, Oddgeir (ASME digital collection;OMAE2018-77873, Chapter, 2018-06-26)
      Model tests have been performed with four mobile offshore drilling units (MODUs) with the aim of identifying wave drift forces and low frequency damping. The MODUs configuration is different, namely on the number and ...
    • Numerical modelling of hydrodynamic responses of Ocean Farm 1 in waves and current and validation against model test measurements 

      Jin, Jingzhe; Su, Biao; Dou, Rui; Luan, Chenyu; Li, Lin; Nygaard, Ivar; Fonseca, Nuno; Gao, Zhen (Peer reviewed; Journal article, 2021)
      With the continuous growing of the aquaculture industry and increasingly limited fish farming sites at close to shore areas both in Norway and worldwide, there is a need to develop fish farms suitable for aquaculture ...
    • Simulation of Low Frequency Motions in Severe Seastates Accounting for Wave-Current Interaction Effects 

      Ommani, Babak; Fonseca, Nuno; Stansberg, Carl Trygve (ASME Proceedings | Offshore Technology;OMAE2017-62550, Chapter, 2017-06-25)
      Today’s industry practice assumes wave drift forces on floating structures can be computed from zero current wave drift force coefficients for the stationary floater, while simplified correction models introduce current ...
    • Wave Drift Forces and Low Frequency Damping on the Exwave FPSO 

      Fonseca, Nuno; Stansberg, Carl Trygve (ASME Proceedings | Offshore Technology;OMAE2017-62540, Chapter, 2017-06-25)
      A method is followed in the present analysis to estimate realistic surge and sway wave drift force coefficients for the Exwave FPSO. Model test data is used to identify the difference frequency wave exciting force coefficients ...
    • Wave Drift Forces and Low Frequency Damping on the Exwave Semi-Submersible 

      Fonseca, Nuno; Stansberg, Carl Trygve (ASME Proceedings | Offshore Technology;OMAE2017-62539, Chapter, 2017-06-25)
      The paper presents realistic horizontal wave drift force coefficients and low frequency damping coefficients for the Exwave semi-submersible under severe seastates. The analysis includes conditions with collinear waves and ...
    • Wave-Current Interaction Effects on Airgap Calculations 

      Hermundstad, Elin Marita; Hoff, Jan Roger; Fonseca, Nuno; Bjørkli, Rune (ASME Proceedings | Offshore Technology;OMAE2017-62548, Chapter, 2017-06-25)
      The importance of wave-current interaction effects on the determination of mean drift forces on floating offshore structures is well documented. Wave-current interaction effects will also influence the first-order motions ...