Nonlinear three-dimensional dynamics of a marine viscoelastic riser subjected to uniform flow

Yang, Wenwu; Ai, Zhijiu; Zhang, Xiaodong; Gou, Ruyi; Chang, Xueping

doi:10.1016/j.oceaneng.2017.12.004

Cited by 36 publications

(9 citation statements)

References 30 publications

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“…In addition, Wang and Jiang [10], used 3D models for non-linear flowing to study various kinds of systems for example: supported pipes placed in the vertical or inclined with motion constraints. While Peng and Xiong [11] confirmed that vibrations are additionally induced by external flow as Duan and Chen [12]; And Yang and Ai [13] stated. Furthermore, Guo and Xie [14] studied the cantilevered fluid-conveying micro-pipe.…”

Section: Introductionmentioning

confidence: 93%

Conductance Study on The Effect of Torsion of Drilling Pipe on The Inside Pattern Fluid Flow

Ateeq¹,

Alshamkhani²,

Morad³

2020

ARFMTS

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The drilling pipe with convoyed water is commonly concentrated in the present day due to the internal and external complex forces exposed to it. Pumping fluid pressure, hydrostatic head and torsion forces are classified as internal forces, while the drilling wall of the pipe and the total deformation caused by these exposed forces are external forces. In this study, the total deformation generated was analysed. Two cases were examined as a standard operating Craft and Graves [1]. The drilling pipe is made of steel with dimensions length (1.5 m); outer diameter (4 in or 101.6 mm) and inner diameter (3.34 in or 84.836 mm). The parameters were modelled by using (INVENTOR PROF 2016 and ANSYS, V. 16.1 software). The results obtained showed that increasing the twisting force on the drilling pipe walls leads to increment in the radial water flow displacement.

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Section: Introductionmentioning

confidence: 93%

Conductance Study on The Effect of Torsion of Drilling Pipe on The Inside Pattern Fluid Flow

Ateeq¹,

Alshamkhani²,

Morad³

2020

ARFMTS

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“…Their results presented that attached ribbons can be used to reduce the drag force on vertical pipes for various directions of incoming flows. Yang et al [9] studied a three-dimensional nonlinear dynamic model of a long riser under vortex-induced vibration to determine the appropriate viscoelastic coefficients to suppress the nonlinear dynamic response. Their results demonstrated that the visco-elastic coefficients have a critical impact on the natural frequency of the riser.…”

Section: Literature Reviewmentioning

confidence: 99%

Numerical Study of New Device for Passive Suppression of Vortex-Induced Vibrations in Deep Water Risers

Abdulaziz

El‐Said

2020

Preprint

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This paper presents a three dimensional numerical simulation to investigate the effectiveness of a new passive device for vortex-induced vibrations (VIV) suppression of deep water risers based on non-continuous helical strakes in staggered arrangement with two starts. The influence of changing the geometries and design parameters, such as the pitch and shape of strakes, on the VIV was studied. The simulation had been carried out at Reynolds number 104, which satisfies the natural conditions of ocean currents. The presented design has been tested using a numerical solver using OpenFOAM platform, which had been presented and validated using number of published benchmarks. The LES – large-eddy simulation is used for turbulence modeling. The results had been compared with the published numerical and experimental works and other design based on drag coefficient. The comparison shows that the proposed geometry can suppress the VIV, if applied in deep water risers. The drag coefficient of 1.05 is considered a reduced value in the modified strakes shape with two starts and non-continuous helical strakes in staggered arrangement. The addition of strakes to the surface of a flexible cantilever was modeled to give the chance for evaluating the effect of geometry on the VIV.

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“…Wang and Xiao 11 investigated the vortex-induced vibration of a vertical riser, subjected to linear and uniform shear currents, and compared their results with tests done by Exxon Mobil at the Norwegian Marine Technology Research Institute (MARINTEK). To control the nonlinear dynamics, a riser with uniform cross flow and geometric nonlinearities was studied by Yang et al 12 Despite the fact that real ocean currents are shear flows, the majority of these studies approximated ocean currents as uniform flow. The loads used in these models are inconsistent with actual conditions, leading to a distortion of the mechanical response of the drilling riser and loss of practical significance.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the mechanical response of a deep-water drilling riser to ocean currents and waves

Tang

Huang

Zhu

et al. 2019

Advances in Mechanical Engineering

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The drilling riser is an important piece of equipment used to link the subsea wellhead with the drilling platform. Its operating environment is extremely complex because of the effects of ocean currents, which can cause riser overload, fatigue, leading to economic loss. Therefore, in order to improve design and prevent premature failure of drilling riser, it is important to research the mechanical response to ocean currents. The effects of tension ratio and platform deflection on the lateral displacement, bending moment, and the stress of the drilling riser are analyzed, under actual working conditions and shear flow. The results show that the bending moment and lateral displacement of the drilling riser decrease significantly and the stress of the riser increases with increasing tension ratio. There is an increase in the lateral displacement of the drilling riser and the bending moment at the lower end of the drilling riser, with an increase in the initial offset of the offshore drilling platform. However, the initial offset of the offshore drilling platform has little effect on the stress of the riser. Under shear flow conditions, the lateral displacement, bending moment, and stress initially increase, then decrease, and finally stabilize. These results can be used to improve the design of drilling riser.

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Nonlinear three-dimensional dynamics of a marine viscoelastic riser subjected to uniform flow

Cited by 36 publications

References 30 publications

Conductance Study on The Effect of Torsion of Drilling Pipe on The Inside Pattern Fluid Flow

Conductance Study on The Effect of Torsion of Drilling Pipe on The Inside Pattern Fluid Flow

Numerical Study of New Device for Passive Suppression of Vortex-Induced Vibrations in Deep Water Risers

Investigation of the mechanical response of a deep-water drilling riser to ocean currents and waves

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