Effect of pipeline-seabed gaps on the vertical forces of a pipeline induced by submarine slide impact

Fan, Ning; Sahdi, Fauzan; Zhang, Wangcheng; Nian, Tingkai; Randolph, Mark

doi:10.1016/j.oceaneng.2020.108506

Cited by 12 publications

(17 citation statements)

References 24 publications

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“…It may also cause the pipeline to vibrate vertically and may achieve resonance if the vertical vibration frequency approaches the natural frequency of the pipeline. A detailed study on the vertical impact force component can be found in Fan et al (2021). In addition, the axial force is not considered in the present study and readers interested in this aspect are referred to Zakeri (2009).…”

Section: Existing Approaches For Evaluating Submarine Slide-pipeline ...mentioning

confidence: 99%

“…The hybrid geotechnical-fluid dynamics framework combines the above two mechanisms, by treating the interaction force components that arise from the viscous strength concept and the inertia separately (e.g. Randolph and White 2012;Sahdi et al 2014;Dong et al 2017;Dutta and Hawlader 2019;Fan et al 2021).…”

Section: Existing Approaches For Evaluating Submarine Slide-pipeline ...mentioning

confidence: 99%

“…The CFD method has been widely employed to simulate the interaction between submarine slides and pipelines (in e.g. Zakeri et al 2009;Liu et al 2015;Fan et al 2018;Guo et al 2019;Zhang et al 2019;Qian et al 2020;Fan et al 2021).…”

Section: Numerical Modelling Of Submarine Slide Mass-pipeline Interac...mentioning

confidence: 99%

“…The solver is based on the finite volume method, and a two-phase flow model was used to simulate the movement of the submarine slide mass in water (details of the numerical method can be referred to Zakeri et al 2009 andFan et al 2021).…”

Section: Numerical Modelling Of Submarine Slide Mass-pipeline Interac...mentioning

confidence: 99%

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Evaluation of horizontal submarine slide impact force on pipeline via a modified hybrid geotechnical – fluid dynamics framework

et al. 2022

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There are situations in offshore energy development where potential impact forces between submarine slides and pipelines need to be estimated. The horizontal slide-pipeline impact force, parallel to the main travel direction of the sliding mass and normal to the pipeline axis, is generally dominant compared to other force components, and hence of particular concern. In practice, pipelines may be suspended at varying distances above the seabed (gap) and existing methods do not consider how this will affect the horizontal slide-pipeline forces. This paper investigates the effects of pipeline-seabed gap and pipeline diameter on the horizontal slide-pipeline impact force via 181 computational fluid dynamics (CFD) simulations at Reynolds numbers of 0.36 - 287. Results show that variation in the pipeline-seabed gap and pipeline diameter alters the slide mass flow behavior as it flows past the pipeline and hence the impact force when the pipeline-seabed gap is below a critical value. A modified hybrid geotechnical-fluid dynamics framework for estimating the horizontal impact force is proposed by considering the effects of the pipeline-seabed gap and pipeline diameter, which is validated with existing experimental datasets.

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Section: Existing Approaches For Evaluating Submarine Slide-pipeline ...mentioning

confidence: 99%

Section: Existing Approaches For Evaluating Submarine Slide-pipeline ...mentioning

confidence: 99%

Section: Numerical Modelling Of Submarine Slide Mass-pipeline Interac...mentioning

confidence: 99%

Section: Numerical Modelling Of Submarine Slide Mass-pipeline Interac...mentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of horizontal submarine slide impact force on pipeline via a modified hybrid geotechnical – fluid dynamics framework

et al. 2022

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“…Next, some researchers extended the previous works to study the normal and longitudinal interaction forces at different impact angles of submarine debris flows [23][24][25]. Afterwards, more factors on the drag force, such as suspension height [26][27][28], temperature of submarine debris flows [29], shape of the pipeline [30][31][32], strain-softening effects on soil strength [33], were also considered. In addition, some studies [34,35] used the material point method to investigate impact forces on pipelines, while an explanation of the mechanism of peak force was provided by [36,37].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Interaction between Submarine Landslides and a Monopile Using CFD Techniques

Chen

Liao

2021

JMSE

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Offshore installations with pile foundations in shallow water are vulnerable to submarine landslides, which cause serious damage to engineering facilities, loss of life, and loss of money. Due to a shortage of real observation data and the difficulty of reproduction, we lack insight into the interaction behavior between submarine landslides and monopiles. This study capitalized on ANSYS Fluent 20.0 to develop a three-dimensional biphasic (water and slurry) numerical model. This CFD model was used to analyze the interaction between a monopile and submarine landslides at different flow heights. The velocities of submarine landslides were from low to high values. Two modes of interactional forces acting on the monopile are proposed, which are (i) interaction force with peak value and (ii) interaction force without peak value. The influence of flow height and velocity on interaction forces was investigated. Results show that the effect of the flow heights on the interaction force is significant at low velocity stage, while the peak force representing a hazard level of the pile was non-negligible under high flow velocity and low flow height conditions, which should be considered in a future study. The related mechanisms are revealed with a hybrid model considering different components of the force.

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Predicting impact forces on pipelines from deep-sea fluidized slides: A comprehensive review of key factors

Guo,

Fan,

Zheng

et al. 2024

International Journal of Mining Science and Technology

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Effect of pipeline-seabed gaps on the vertical forces of a pipeline induced by submarine slide impact

Cited by 12 publications

References 24 publications

Evaluation of horizontal submarine slide impact force on pipeline via a modified hybrid geotechnical – fluid dynamics framework

Evaluation of horizontal submarine slide impact force on pipeline via a modified hybrid geotechnical – fluid dynamics framework

Numerical Study on Interaction between Submarine Landslides and a Monopile Using CFD Techniques

Predicting impact forces on pipelines from deep-sea fluidized slides: A comprehensive review of key factors

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