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Keywords: keel
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Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1260
... strength old ice ridge salinity ice feature upstream oil & gas average value porosity proceedings drilling operation ice density ice ridge keel thickness characteristic average thickness local strength level ice first-year ice ridge drilling profile internal structure...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1264
... of the consolidated layer distribution are shown depending on the study region and the ridge-building conditions. Averaged profiles of the cross-section of the ice ridge are shown, the nature of the change in the thickness of the consolidated layer concerning the sail and keel of the ice ridge is shown. Averaged...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-334
... in the ice ridge is considered. Dependence of the CL thickness change on the external ice ridge parameters (sail, keel, total thickness) is determined. It is shown that the largest CL thickness is observed in the zone, combining the maximum sail and keel. The averaged porosity distribution by vertical...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-339
... of ice features made it possible to identify four characteristic types of stamukha keel shapes. Drift of stamukhas with the maximum duration of thirty days was recorded. INTRODUCTION Stamukhas - grounded ridged ice features (WMO, 2017) present typical forms of immobile ice in the shallow offshore...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-421
... for calculating fatigue damage to a ship s structure as it navigates in ridged ice fields. A semi-empirical method is introduced to develop the numerical model of ship ice interaction in level ice and consolidated layer in ice ridges. Rankine s plasticity model is applied to calculate ice loads in ridge keels...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-079
... ABSTRACT This paper aims to numerically simulate the loading process when a moored ship is intruded by an ice ridge. Ice force caused by ice keel is calculated based on suggestions from ISO while the ice force due to consolidated layer is taken as level ice and simulated with circumferential...
Proceedings Papers

Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-469
...¶V NL, Canada ABSTRACT Punch tests were carried out on manufactured freshwater ice rubble keels during the Pipeline Ice Risk and Mitigation (PIRAM) and Development of Ice Ridge Keel Strength (DIRKS) projects. The majority of the tests were carried out while the keel was still in contact...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-256
... instrument drilling result level ice laser keel oikkonen ice block information ice formation dimension ice ridge 2 ice ridge void Fast methods for measuring ice ridges in full-scale Teemu Heinonen Testing & Research, Aker Arctic Technology Inc Helsinki, Finland Annu Oikkonen Marine Research...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-818
... Sea. The seasonal characteristics of the massive ice deformation episodes are presented for each region including the frequency of occurrence of deformed ice. The variation in ice types (large individual keels, hummocky ice) area also analyzed as to their seasonal characteristics. massive ice...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-038
... keel offshore wind turbine cone lake erie thickness platform design Significance of Ice Impact on Structural Integrity of a Monopile Offshore Wind Turbine in The Great Lakes Mahdi Norouzi, Eric Wells, Sorin Cioc, Efstratios Nikolaidis and Abdollah Afjeh MIME Department, The University of Toledo...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-135
... of reducing the cost of protection, among them the choice of route, combinations of horizontal drilling and conventional construction, and protecting the pipeline in situ. INTRODUCTION Seabed gouging by ice keels has long been recognized as a threat to the security of Arctic seabed pipelines. Investigation...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-483
... ABSTRACT: This paper presents a validated methodology to calculate the oscillatory loads on bilge keels of ships operating at zero forward speed in irregular sea states. To calculate these loads, the local relative fluid velocities acting normal to the bilge keel are combined with a KC...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-129
... ABSTRACT Ice gouging demands trenches of appropriate depths to protect pipelines and other seabed facilities from loads associated with ice keel impacts and subgouge soil deformations. Design trenches are a sensitive decision in terms of development economics, hence, the rationale...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-222
... ABSTRACT This paper summarizes the compilation of information on physical simulations of seabed scouring by ice keels, and the resulting database. Physical simulations are critical for a proper understanding of ice scouring phenomena. A total of 487 scour simulations from twenty-eight studies...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-098
... ABSTRACT In this study, soil failure mechanisms and subgouge soil deformations for ice keel/seabed interactions are examined. Consideration of soil constitutive model, ice-soil interface contact mechanics and the assumed ice keel geometry and their effects on soil response are discussed. While...
Proceedings Papers

Paper presented at the The Twenty-first International Offshore and Polar Engineering Conference, June 19–24, 2011
Paper Number: ISOPE-I-11-270
... analysis predictions against field measurements. For a Spar with pulltubes the riser behavior is dictated by vessel motions at the keel. Hence, the measured vessel motions have to be transferred to the keel prior to conducting riser analysis. The limitations of existing spar vessel monitoring systems...
Proceedings Papers

Paper presented at the The Twentieth International Offshore and Polar Engineering Conference, June 20–25, 2010
Paper Number: ISOPE-I-10-651
... performance rudder sensor vector resultant vector equation water current equilibrium equation fluid force brake calculation real time system sea surface keel masuyama rudder angle Steady Sailing Performance of Spilled Oil Tracking Autonomous Buoy with Yacht Shape Masahiro Hiratsuka*, Naomi...
Proceedings Papers

Paper presented at the The Eighteenth International Offshore and Polar Engineering Conference, July 6–11, 2008
Paper Number: ISOPE-I-08-358
... ABSTRACT In this work the flow field around an America's cup class Keel is studied by the numerical solution of the Reynolds Averaged Navier-Stokes equations (RANSE). An analysis is carried out in order to assess the efficiency of the winglet in reducing the induced resistance of the keel...
Proceedings Papers

Paper presented at the The Eighteenth International Offshore and Polar Engineering Conference, July 6–11, 2008
Paper Number: ISOPE-I-08-004
... be in main danger of ice piles formation on the shore and the seabed exaration by the ice formations, such as hummocks, ridges rows, grounded hummocks, icebergs, etc. As a result of this process, the keels (i.e. the underwater parts) of the ice features leave long trenches in the seabed named gouges. Direct...
Proceedings Papers

Paper presented at the The Seventeenth International Offshore and Polar Engineering Conference, July 1–6, 2007
Paper Number: ISOPE-I-07-478
... think also apply much more widely. Detailed consideration is given to possible roles of lateral keels and rows of scutes located on and near the caudal peduncles in many different elasmobranchs (sharks) and bony fishes, also to the peduncular keels found in all cetaceans. Similar structures in some...

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