Development and Validation of a Coupled Eulerian Lagrangian Finite Element Ice Scour Model

Abdalla, Basel; Pike, Kenton; Eltaher, Ayman; Jukes, Paul; Duron, Billy

doi:10.1115/omae2009-79553

Cited by 11 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ref 1,10,12) of advanced numerical modelling of ice-soil-pipe interaction using explicit finite element analysis techniques, such as Coupled Eulerian Lagrangian (CEL) analysis and Arbitrary Lagrangian Eulerian (ALE) adaptive meshing. Ref 1,10,12) of advanced numerical modelling of ice-soil-pipe interaction using explicit finite element analysis techniques, such as Coupled Eulerian Lagrangian (CEL) analysis and Arbitrary Lagrangian Eulerian (ALE) adaptive meshing.…”

Section: Coupled Eulerian Lagrangian Methodsmentioning

confidence: 99%

Ice Gouge Interaction with Buried Pipelines Assessment Using Advanced Coupled Eulerian Lagrangian

et al. 2012

View full text Add to dashboard Cite

Ice gouging of the seabed is an issue in cold regions where sea ice pressure ridge keels or icebergs can contact the seabed. This creates a design challenge as pipelines must be buried to a sufficient depth to resist loads transferred through the soil to the pipeline. However, as trenching and backfilling is expensive and technically challenging, a goal needs to be to optimize the depth of burial during design.Conventional methods to evaluate the ice gouge loading on a buried pipeline rely on decoupled analysis of the icesoil and soil-pipe responses, which is believed to be a conservative approach and not adequately representative. In this paper, ice gouging is investigated using advanced numerical modelling techniques to reduce this conservatism and better quantify the loads experienced by the pipeline due to ice gouges.The Coupled Eulerian Lagrangian (CEL) finite element method is utilized in a series of comparative studies based upon available centrifuge and full scale test data. The CEL analysis results in relatively smaller sub-gouge deformation depth than the current guidance suggests, based on centrifuge tests. The shallow sub-gouge deformation zone indicated appears to correlate well with the limited amount of full scale test data available. If the less conservative CEL result can be validated, significant burial depth reductions can be achieved.CEL technology originally developed in the early 1960s, however, it has not been widely used until the late 1990s. The soil behaviour in this matter is critical, thus the paper investigates the CEL capabilities to implement geotechnical soil models i.e. Mohr-coulomb soil model. Furthermore, the paper assesses the benefits and limitations of using advanced finite element methods to investigate ice-soil-pipe interaction, highlighting the constraints and the required further developments for the current technology to enable the industry to better evaluate the risk of ice gouging.

show abstract

Section: Coupled Eulerian Lagrangian Methodsmentioning

confidence: 99%

Ice Gouge Interaction with Buried Pipelines Assessment Using Advanced Coupled Eulerian Lagrangian

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Konuk & Yu (2007), Liferov et al (2007) and Abdalla et al (2009) compared their numerical modelling predictions to the physical model test data produced from PRISE. The Pressure Ridge Ice Scour Experiment (PRISE) joint industry research program was led by C-CORE, Phillips et al (2005).…”

Section: Physical Model Test Datamentioning

confidence: 99%

“…Woodworth-Lynas et al (1996) developed conservative empirical equations (1) and (2) for SGD under steady state gouging in soft to medium clays based only on the rectangular gouge cross sectional geometry for flat faced indenters with attack angles in the range 15 to 30 degrees: Supplemented by continuum finite element analysis, the experimental program investigated the effects of soil type (e.g.…”

Section: Physical Model Test Datamentioning

confidence: 99%

“…The lateral and vertical deformations, u and v are assessed at depth, z below the gouge level of width, W and depth, D. Lateral deformations, equation (2), are described as a cosine attenuation where 'y' is measured positively from centerline (y = 0).…”

Section: Physical Model Test Datamentioning

confidence: 99%

“…Continuum explicit finite element eulerian-based analyses provide an adequate framework for consideration of the iceseabed -pipe interaction as demonstrated by Nobahar et al (2007), Liferov et al (2007), Konuk & Yu (2007) and Abdalla et al (2009). These analyses focused on clay seabeds and can be calibrated using appropriate material parameters, but need to be validated against physical data.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

SS: Atlantic Canada

Phillips

Barrett²,

Al-Showaiter

2010

All Days

View full text Add to dashboard Cite

Moving ice features impose significant challenges on engineering aspects of offshore oil and gas field development in the Arctic and sub-Arctic regions, particularly related to their interaction through the seabed with submarine installations such as pipelines. This paper compares continuum finite element modelling of ice keel-seabed interaction against physical model data and evaluates the current state-of-the-art. It identifies areas requiring further research and development, and evaluate potential limits on ice gouging in soft to stiff clays.

show abstract

Resource Development in Arctic Regions

Kenny

Jukes²

2018

Encyclopedia of Maritime and Offshore Engineering

View full text Add to dashboard Cite

Hydrocarbon basins in global arctic regions hold significant resources with economic potential to support an array of economic sectors including energy, transportation, petrochemical, agricultural, and manufacturing industries. Due to the harsh physical environment, northern and arctic regions present significant technical and logistical challenges that influence the development of engineering solutions through the design process and may affect the project viability and sanction with respect to technical or economic factors. One of the more significant hazards and extreme loading events encountered is ice gouging due to the interaction of ice features with the seabed subject to environmental driving forces. Trenching and pipeline burial is viewed as one of the most effective mitigation techniques used to promote pipeline serviceability and reduce the risk of pipeline damage; however, there are limitations and constraints with current technologies with respect to the maximum trenching depth and production rates that affect project logistics and economic risk. In addition, there are other physical environmental factors that present challenges including the short open water season, low temperatures, and presence of special terrain characteristics (e.g., hardpan, permafrost, massive ground ice). Current practice used to define system demand (i.e., geotechnical loads) and system capacity (i.e., pipeline mechanical performance) has limitations due to inherent uncertainties with the statistics of physical data sets, experimental techniques, and engineering models used in the analysis. Advancements in computational methods have provided improved engineering tools to analyze these complex nonlinear processes with probabilistic methods providing an objective framework to assess design options with respect to technical, economic, and environmental criteria that meet specified target safety levels. Consideration of cumulative effects, climate change, and sustainability factors add an additional layer of complexity to the engineering framework in terms of social context and political values.

show abstract

Development and Validation of a Coupled Eulerian Lagrangian Finite Element Ice Scour Model

Cited by 11 publications

References 0 publications

Ice Gouge Interaction with Buried Pipelines Assessment Using Advanced Coupled Eulerian Lagrangian

Ice Gouge Interaction with Buried Pipelines Assessment Using Advanced Coupled Eulerian Lagrangian

SS: Atlantic Canada

Resource Development in Arctic Regions

Contact Info

Product

Resources

About