Pipeline Installation Methods

Guo, Boyun; Song, Shanhong; Ghalambor, Ali; Lin, Tian Ran

doi:10.1016/b978-0-12-397949-0.00011-x

Cited by 14 publications

(12 citation statements)

References 5 publications

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“…6.8 [24] suggests utilizing the FEM for computing the responses of the long free-spanning undersea pipeline (i.e., L D > 140). However, the FEM might be time-consuming and unsatisfied when numerous computations are required, due to the heavy graphical user interface (GUI) and complex model definition [16,44]. Consequently, in this study, the FEM-based Abaqus is used to verify the proposed closed-form solution for use in computing the static deformation and fundamental frequency of long free-span submarine pipelines.…”

Section: Determination Of Natural Frequency In Finite Elementmentioning

confidence: 99%

“…[21,42,43]. However, in many simulations, the employment of these commercial finite element programs becomes frustrating and time-consuming in terms of model definition as well as data processing due to the burdensome Graphical User Interface (GUI) [16,44]. To elucidate this, the establishment and resolution of an FEM model can generally take hours and minutes, respectively.…”

Section: Introductionmentioning

confidence: 99%

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An Analytical Expression for the Fundamental Frequency of a Long Free-Spanning Submarine Pipeline

Phuor,

Trapper,

Ganz

2023

Mathematics

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The DNVGL-RP-F105 guidelines provide essential techniques for the preliminary design of undersea pipelines. However, its approximations for static displacement and the natural frequency of the pipe are restricted to cases where the ratio of the pipe’s diameter to its length (L/D) is less than 140. This limitation poses challenges for longer spans, which, although rare, can sometimes be unavoidable. This study introduces a novel analytical method, rooted in the energy method and cable theory, for computing the static deformation and natural frequency of long free-span underwater pipelines. We conducted a comprehensive verification of our proposed method by comparing its outcomes with those of 212 finite element analysis simulations. The results reveal excellent predictions for long spans. However, for shorter spans, traditional methods remain more accurate. Additionally, we explored the influence of pipeline’s diameter, thickness, and boundary conditions on both static displacement and frequency, providing valuable insights for design considerations. We found that the boundary conditions’ impact on the fundamental frequency becomes negligible for long spans, with up to a 10% difference between pinned–pinned and fixed–fixed conditions. In essence, this research offers a vital enhancement to the existing DNV guidelines, becoming particularly beneficial during the preliminary design phases of pipelines with L/D ratios exceeding 140.

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Section: Determination Of Natural Frequency In Finite Elementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Analytical Expression for the Fundamental Frequency of a Long Free-Spanning Submarine Pipeline

Phuor,

Trapper,

Ganz

2023

Mathematics

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“…Oil pipelines are extremely economical, energy-efficient, environment friendly and safest way to transport refined/crude oil across great distances from oil fields/terminals to an oil device/refinery (Zhang and Zhou, 2014). During the transportation process, pipelines may undergo several failures, like leakages (owing to corrosion or crack) and sudden shock/burst/fracture (owing to earthquake, thunder or wind) (Guo et al , 2013). As the crack defects emerge because of corrosion, pipelines are more subjected to shock damages, and the possibility of occurrence of burst increases sharply (Parvizsedghy et al , 2015).…”

Section: Numerical Examplementioning

confidence: 99%

Modeling a sequentially inspected system prone to degradation and shocks

Pant

Singh

2021

IJQRM

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PurposeIn certain environments, the system may not fail completely, but undergoes degradation, and the system productivity might decrease. Meanwhile, at the same time, the system may be vulnerable to shocks. A single-unit system prone to degradation and shocks is proposed in this study, and emphasis is placed upon determining its availability and cost rate.Design/methodology/approachThe considered single-unit system is expected to have three states, namely, normal, degraded and failed. As the system enters the degraded state, it is said to be partially failed. The degraded state incurs higher degradation than the normal state and is more prone to shocks. Inspections are used to determine the state and failure type of the system. Inspections are predetermined to be carried out sequentially at time I, I+aI, I+aI+a2I,… where 0 < a ≤ 1, until the detection of degradation/failure. Perfect repairs are conducted instantly on spotting the partial/complete failure. Two cases have been considered of repair taking constant times and random times.FindingsExplicit results on the reliability, availability (both point and limiting availability) and long-run average cost rate (LRACR) of a sequentially inspected single-unit system prone to degradation and shocks under constant and random repair times are given. Numerical example of an oil pipeline system is taken to clarify the acquired results.Originality/valueA sequentially inspected single-unit system prone to degradation and shock is studied unlike done previously.

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“…The main objective is to maximize throughput and prolong the life of a pipeline system while ensuring public safety and respecting the environment. In general, design of pipeline involves selection of pipeline diameter, thickness, and material to be used (Guo et al 2014). The early methods of inspection involved acoustic technique, AE technique, thermography technique, vibration technique, and high frequency ultrasound technique.…”

Section: Introductionmentioning

confidence: 99%

Knowledge Management: Intelligent In-pipe Inspection Robot Conceptual Design for Pipeline Infrastructure Management

Xing

2015

Intelligent Techniques in Engineering Management

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Pipeline Installation Methods

Cited by 14 publications

References 5 publications

An Analytical Expression for the Fundamental Frequency of a Long Free-Spanning Submarine Pipeline

An Analytical Expression for the Fundamental Frequency of a Long Free-Spanning Submarine Pipeline

Modeling a sequentially inspected system prone to degradation and shocks

Knowledge Management: Intelligent In-pipe Inspection Robot Conceptual Design for Pipeline Infrastructure Management

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