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Record W1523966678

Cyclic Ice Loading on the Molikpaq

2013· article· en· W1523966678 on OpenAlexaffabout
Sarah Mapplebeck

Bibliographic record

VenueThe Journal of Macrodynamic Analysis (Memorial University of Newfoundland) · 2013
Typearticle
Languageen
FieldEngineering
TopicOffshore Engineering and Technologies
Canadian institutionsMemorial University of Newfoundland
Fundersnot available
KeywordsBeaufort seaGeologySea iceSubmarine pipelineBermArcticOceanographyLiquefactionDrillingEngineeringGeotechnical engineering
DOInot available

Abstract

fetched live from OpenAlex

The Beaufort Sea is located north of Northwest Territories, the Yukon and Alaska, and west of Banks Island.The centre and northern part of this sea is frozen solid all year round, and the sea is exposed to considerable ice scour.Petroleum exploration in the ice packed Beaufort Sea in the 1960's led companies to develop offshore structures that would withstand extreme ice loading.In 1984 Gulf Canada Resources Ltd. deployed a mobile arctic caisson into the Beaufort Sea called the Molikpaq.The Molikpaq was installed on an artificially constructed berm, where it completed exploratory drilling during four subsequent winters.At the time that the Molikpaq was designed, ice loading on structures was a little known matter.To alleviate this knowledge gap, hundreds of sensors were installed on the Molikpaq to observe and attempt to predict behaviour due to loading.In 1986 the Molikpaq platform was brought to within minutes of failure due to cyclic loading.In this particular event the ice loading occurred at such a frequency that vibration occurred, causing liquefaction of the inner sand core.The sensor readings and detailed observations of this event and the various other loading encounters on the Molikpaq have provided a considerable amount of information for future projects.This paper compiles information on the design and installation of the Molikpaq in the Beaufort Sea.This drilling structure had various successes in regards to resisting ice loading, but eventually came near failure due to the unfamiliar characteristics of cyclic loading.This event will be explored, noting the lessons learned, and how this has affected and will continue to affect other offshore structures deployed in ice-filled waters. 1

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: Simulation or modeling
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.066
Threshold uncertainty score0.377

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.001
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0010.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.006
GPT teacher head0.170
Teacher spread0.164 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designSimulation or modeling
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2013
Admission routes2
Has abstractyes

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