... iceberg failure processes and the second evaluated the transverse flowline motion when a free-floating keel snags a flexible pipe laid on the seabed. marginal field development flowline offshore pipeline grand bank displacement interaction cable strength technology conference investigate...

... Abstract Numerous field studies show that mature first-year (FY) ridges consist of a solid ice consolidated layer (CL) below which is a keel of ice rubble. The CL is generally thicker than the ambient level ice. With the decrease in multi-year ice in the Arctic, FY ridges may become...

... flowline due to interaction with free-floating and gouging icebergs. Large deformation finite element analysis is utilized to simulate the iceberg-flowline-soil interaction scenario. The iceberg keel is idealized with shape and dimensions based on analysis of recent iceberg profiles. A sensitivity study...

...-Arctic. Important components of a ridge creating ice loads are the consolidated layer at the surface (which is considered as solid ice) and the ridge keel below consisting of ice rubble, but much thicker. The load due to the consolidated layer is usually derived as if it is thick level ice. On a cone...

... Abstract When icebergs touch and scour through unconsolidated seafloor sediment the keel ice may fracture and crush, creating individual ice blocks that may rotate independently of each other under confining pressure. Blocks of ice also may be forced into and embedded in the seafloor beneath...

... interaction iceberg upstream oil & gas floating production system shaft radius subsea system illustration caisson iceberg cg artificial intelligence application topsides scour force spar fpu rotation keel iceberg impact scour depth References References Baraff , D . 1997a...

... measurements to be a complete and robust characterization of potentially hazardous features. In this paper, we apply algorithms that detect different types of sea ice features: large singular ice keels, hummocky ice, thick brash ice, old or multi-year ice and marine glacial ice (icebergs and ice islands...

... was selected and vertical loads were monitored; the other with a pre-set vertical load and where keel heaving is allowed. Soil type and normal versus high simulated gravity are two other decisive parameters in test design. The results of this compilation are summarized. Parametric analysis of variables...

... contains information on 206 runs from 18 major numerical studies. Using the database, knowledge gaps have been assessed. A list has been made of topics which were given little attention despite their probable importance, including deformable ice keel, different-from-seabed trench backfill soil...

... Abstract The Development of Ice Ridge Keel Strengths is a four-year collaborative venture between the C—CORE Centre for Arctic Resource Development (CARD) and the National Research Council – Ocean, Coastal & River Engineering (NRC-OCRE). The main focus of the project is to investigate...

... of ice gouging has been developed and exercised to better understand how the environmental conditions affect the gouging process. Further, numerical simulations of the keel-soil-pipe interaction have been performed, relating to the input and output of the ice gouging model. The ice gouging simulations...

... Abstract Typical rock berms used to protect submarine pipelines may be damaged under shear by a first year grounded ice rubble keel. Physical model tests in a centrifuge have indicated that such damage occurs under loads less than those typical of actual design conditions. These novel tests...

... Abstract A simple, rectangular sub-surface caisson was evaluated using physical andnumerical modeling to develop a method for protecting subsea installationsagainst scouring keels of icebergs on the Grand Banks. This protection strategywas developed to assess the feasibility of the structure...

... processesbased on the relationship of maximum ice thickness as a function ofsimultaneous values of undeformed ice thickness. Using the more extensive ULSice keel data sets now available, these methods were re-evaluated and updated. Similar analyses were carried out on ice thickness measurements obtained...

... Abstract The Pipeline Ice Risk Assessment & Mitigation JIP (PIRAM) developed aset of engineering models and design procedures for implementation intoindustry best practices for risk mitigation and protection of pipelineinfrastructure from ice keel loading. The models established...

... Abstract A test program, undertaken as part of a C-CORE led Joint Industry Program(JIP), was carried out to investigate the limiting strength and failuremechanisms of seabed gouging ice ridge keels. A test frame was designed, fabricated, commissioned and used in the test program. During tests...

... displacement horizontal displacement deformation test data soil deformation keel displacement spring model offshore pipeline cel model constitutive model eulerian lagrangian OTC 23764 Ice Gouge Interaction with Buried Pipelines Assessment Using Advanced Coupled Eulerian Lagrangian Sherif El...

... frequency water depth riser mooring system resonance keel operation turret buoy stability subsea system moon pool otc 22136 hull natural period turret water plane area spectrum fpso upstream oil & gas OTC 22136 Circular FPSO for Arctic Deepwater Nagan Srinivasan, Consultant...

... Abstract Offshore Arctic pipelines must be designed to withstand unique loading conditions of seafloor gouging by drifting sea ice ridge keels and icebergs. Due to the high cost of offshore pipeline burial, determination of the required burial depth is a critical factor for economical designs...