Dynamic Lay Stresses for Pipelines

Bryndum, M.B.; Colquhoun, Robin S.; Verwey, A.B.

doi:10.4043/4267-ms

Cited by 3 publications

(3 citation statements)

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“…Furthermore, the collapse under bending stress is a function of diameter-to-thickness ratio, initial imperfection and axial compressive stress [113][114][115][116]. Guo et al [115] empirically found that the bending strain (εB) is related to the thickness (t) and diameter (D) of the pipeline in the following way,…”

Section: Bendingmentioning

confidence: 99%

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Buckling Mechanism of Offshore Pipelines: A State of the Art

Seth

Manna

Shahu

et al. 2021

JMSE

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The buckling analysis of an offshore pipeline refers to the analysis of temperature-induced uplift and lateral buckling of pipelines by analytical, numerical, and experimental means. Thus, the current study discusses different research performed on thermal pipe-buckling and the different factors affecting the pipeline’s buckling behaviour. The current study consists of the dependency of the pipe-buckling direction on the seabed features and burial condition; the pre-buckling and post-buckling load-displacement behaviour of the pipeline; the effect of soil weight, burial depth, axial resistance, imperfection amplitude, temperature difference, interface tensile capacity, and diameter-to-thickness ratio on the uplift and lateral resistance; and the failure mechanism of the pipeline. Moreover, the effect of external hydrostatic pressure, bending moment, initial imperfection, sectional rigidity, and diameter-to-thickness ratio of the pipeline on collapse load of the pipeline during buckling were also included in the study. This work highlights the existing knowledge on the topic along with the main findings performed up to recent research. In addition, the reference literature on the topic is given and analysed to contribute to a broad perspective on buckling analysis of offshore pipelines. This work provides a starting point to identify further innovation and development guidelines for professionals and researchers dealing with offshore pipelines, which are key infrastructures for numerous maritime applications.

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Section: Bendingmentioning

confidence: 99%

“…Several authors described the pipe bending from the non-linear beam bending [113,114]. They observed that bending stresses are more intensified at the field joint, where the bending stress is critical.…”

Section: Bendingmentioning

confidence: 99%

Buckling Mechanism of Offshore Pipelines: A State of the Art

Seth

Manna

Shahu

et al. 2021

JMSE

View full text Add to dashboard Cite

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“…For this problem no exact solutions are known, and approximations must be considered either by numerical methods, or by equation simplification. Numerical approaches were studied for a beam with small deflections in [16], and a nonlinear method was studied in [17]. If the flexural rigidity vanishes, an exact analytical solutions can be obtained for (1), known as the natural catenary.…”

Section: The Beam Modelmentioning

confidence: 99%

Mathematical Models for Model-Based Control in Offshore Pipelay Operations

Jensen

Fossen

2009

Volume 3: Pipeline and Riser Technology

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This paper considers mathematical models for model-based controller design in offshore pipelay operations. Three classes of models for control design are discussed, real-world models suitable for controller design verification, controller and observer models which are used on-line in the control system implementation. The control application place requirements on the model with respect to the computational time, dynamic behavior, stability and accuracy. Models such as the beam model, two catenary models, as well as general finite element (FE) models obtained from computer programs were not able to meet all of the requirements, and two recent dynamic models designed for control are presented, which bridge the gap between the simple analytical and more complex FE models. For completeness, modeling of the pipelay vessel, stinger and roller interaction, soil and seabed interaction and environmental loads are discussed.

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