VIV Response of a Subsea Jumper in Uniform Current

Wang, Howard; Huang, Jerry; Lee, Sungho; Gioielli, Paulo; Kan, Wan C.; Spencer, Don; Islam, Mohammed

doi:10.1115/omae2013-11417

Cited by 10 publications

(5 citation statements)

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“…Marine environment loads due to seawater, waves, and currents can be simulated using commands such as OCTYPE, OCDATA, and OCTABLE [35]. To verify the accuracy of this approach, we applied a modal analysis to the jumper model proposed by Wang et al [36] and compared the natural frequencies with those obtained in related studies. Given the discretization model in this study, we used the Block Lanczos method for modal calculations in APDL and the Krylov subspace algorithm in MATLAB.…”

Section: Solution and Verificationmentioning

confidence: 99%

Subsea jumper damage detection based on fractal analysis and modal characteristics

2024

Brodogradnja

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Subsea jumpers play a critical role in subsea oil and gas production. Structural damage such as cracks is inevitable in subsea jumpers due to the harsh marine environment (internal fluid flow corrosion, high temperature and pressure, etc.). However, the current research on damage detection and evaluation of subsea jumpers is limited, particularly in cases of slight damage. This study thus proposes a method to identify cracks in subsea jumpers based on the modal characteristics and fractal theory. The accuracy of the method is verified by comparing the finite element simulation method via APDL and the analytical method via MATLAB. In addition, the sensitivity of the method to noise is investigated. The results indicate that the method accurately identifies cracks (single and multiple) with a minimum depth of 0.2 mm in various locations on subsea jumpers. This study may hold significant reference value for improving the safety and reliability of subsea jumpers.

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Section: Solution and Verificationmentioning

confidence: 99%

Subsea jumper damage detection based on fractal analysis and modal characteristics

2024

Brodogradnja

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“…ExxonMobil (Wang et al, 2013) conducted tests using a model of a shaped jumper to investigate how to predict VIV. This model's scaled arch length was 13.96 m, and the ratio was 4.525.…”

Section: Case I -A Single Planar Subsea Jumpermentioning

confidence: 99%

“…ExxonMobil experimented using a thin-walled aluminum pipe for the model jumper. This resulted in a relatively less massive model than the thick-walled steel prototype (Wang et al, 2013). Low-density oil, high-density sugar, and lead weights were added and evenly distributed along the length to increase the model's mass.…”

Section: Case I -A Single Planar Subsea Jumpermentioning

confidence: 99%

“…In Gao et al (2022), a typical stiffened cylindrical shell's vibration and sound radiation under broad excitation were measured underwater. ExxonMobil (Wang et al, 2013) conducted model tests using an M-shaped jumper model to evaluate the accuracy of potential VIV prediction methods. They simulated constant bottom currents to achieve lower velocities that activate the relevant vibration modes.…”

Section: Introductionmentioning

confidence: 99%

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The Application of the Coupled Acoustic-Structural Approach (Casa) Method on the Free Vibration of Submerged Structures

Liu,

Ullestad

2023

Preprint

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“…In order to incorporate the pipeline of the new oilfield into the already laid submarine pipeline network, it is necessary to connect the two fixed-point pipelines together on the seabed [3,4]. At present, the main method of connecting deep-sea pipeline is to connect the two ends of the prepared transition pipeline to the oil outlet of the old pipeline and the oil inlet of the new pipeline [5]. The transition ducts that perfectly match the two sections of the pipeline need to accurately measure the relative position of the new and old pipelines.…”

Section: Introductionmentioning

confidence: 99%

Development of a Position Measuring Device of a Deep-Sea Pipeline Based on Flange Center Positioning

Wang

Dang

Wang

et al. 2020

JMSE

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A deep-sea pipeline position and attitude-measuring device based on pipeline outer circle positioning can measure the spatial relative positions of the end faces of two oil pipelines in the deep sea. This device can provide the necessary data to make a transition pipeline connecting two sections of oil pipelines together. However, after analyzing the data measured by this device, it is found that the measurement data has a large error because the error transmission coefficient of the measurement value is too large. In order to reduce the error transfer coefficient, a new measuring device for measuring the posture of deep-sea pipelines by a tensioning rope was proposed. Unlike previous measuring devices, this measuring device is based on the positioning of the flange center of the pipe instead of the pin on the outer circle of the pipe. With the comparison of positioning methods between fixing in the center of flange and fixing the outer wall of pipeline, the former can reduce the transition matrix in the process of solving the relative position of the two pipes, and then reduce the magnification of the measurement sensor error. It also reduces two measurement parameters. The solving formula of the position and attitude of the measuring device based on the outer circle positioning of the pipeline is analyzed. It is proved that the error transmission coefficient of the measuring device based on the flange center positioning is smaller. Experiments show that compared with the positioning method based on the outer circle of the pipe, the positioning method based on the flange center has a higher accuracy.acoustic measurement system requires a large amount of equipment, and the installation work takes a long time. It is generally used for large-area mapping and geological exploration of seabed topography, and is rarely used in the measurement of underwater pipeline poses [9,10]. Satellite positioning technology is applied to a variety of underwater positioning tasks. For example, a measurement system consisting of underwater GPS and a single beam measuring instrument can effectively solve underwater high-precision positioning problems [11,12]. Drawstring measurements include traditional tensioning rope measurements and intelligent drawstring measurements. A diver carrying a measuring tool under water carries out the traditional tensioning rope measurement method [13]. The drawstring intelligent measurement method is suitable for a deep water environment, and it has the characteristics of high measurement accuracy and real-time dynamic measurement [14]. For example, the unmanned drawstring system developed by NGI of Norway, which is not limited by water depth, has a length accuracy of ±10 cm and an angular accuracy of ±0.5 • [15]. Professor Wang Liquan of Harbin Engineering University in China proposed a deep-sea measurement system on the pipeline attitude. Its maximum working water depth is 1500 m, which can achieve a measurement accuracy of ±50 mm and ±1 • within a 5 m working range [16]. In addition to the above met...

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VIV Response of a Subsea Jumper in Uniform Current

Cited by 10 publications

References 0 publications

Subsea jumper damage detection based on fractal analysis and modal characteristics

Subsea jumper damage detection based on fractal analysis and modal characteristics

The Application of the Coupled Acoustic-Structural Approach (Casa) Method on the Free Vibration of Submerged Structures

Development of a Position Measuring Device of a Deep-Sea Pipeline Based on Flange Center Positioning

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