A mini review of recent progress on vortex-induced vibrations of marine risers

Liu, Guijie; Li, Haiyang; Qiu, Zhaozun; Leng, Dingxin; Li, Zhixiong; Li, Weihua

doi:10.1016/j.oceaneng.2019.106704

Cited by 120 publications

(21 citation statements)

References 159 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The bottom form is the same shape as case a-c. It can be observed that the value of 1 P and 2 P fluctuate greatly when the value of q is in the interval (1,5). That is to say, the depth inversion has to consider the bottom topography in the intermediate because the nonlinear effect caused by terrain change on wave propagation is difficult to ignore.…”

Section: Numerical Results Vs Experiments Datamentioning

confidence: 99%

“…Then, the acquired image is processed with the maximum total coherence frequency band, and the corresponding frequency and wave number pairs are generated at each calculation point [43]. For the obtained digital image or video image, the Fourier transform is used to decompose time-varying It can be observed that the value of P 1 and P 2 fluctuate greatly when the value of q is in the interval (1,5). That is to say, the depth inversion has to consider the bottom topography in the intermediate because the nonlinear effect caused by terrain change on wave propagation is difficult to ignore.…”

Section: Discussionmentioning

confidence: 99%

“…In coastal engineering, real-time updated and accurate water depth data are critical to solve many marine problems [1][2][3][4][5][6][7]. Traditionally, marine bathymetry data are mainly obtained by using sonar to carry out field exploration.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Accurate Depth Inversion Method for Coastal Bathymetry: Introduction of Water Wave High-Order Dispersion Relation

Líu

Zhang

2020

JMSE

View full text Add to dashboard Cite

This paper proposes a wave model for the depth inversion of sea bathymetry based on a new high-order dispersion relation which is more suitable for intermediate water depth. The core of this model, a high-order dispersion relation is derived in this paper. First of all, new formulations of wave over generally varying seabed topography are derived using Fredholm’s alternative theorem (FAT). In the new formulations, the governing equation is coupled with wave number and varying seabed effects. A new high-order dispersion relation can be obtained from the coupling equation. It is worth mentioning that both the slope square and curvature terms ( ( ∇ h ) 2 , ∇ 2 h , ( ∇ k ) 2 , ∇ 2 k , ∇ h ⋅ ∇ k ) of water wavenumber and seabed bottom are explicitly expressed in high-order dispersion relation. Therefore, the proposed method of coastal bathymetry reversion using the higher-order dispersion relation model is more accurate, efficient, and economic.

show abstract

Section: Numerical Results Vs Experiments Datamentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Accurate Depth Inversion Method for Coastal Bathymetry: Introduction of Water Wave High-Order Dispersion Relation

Líu

Zhang

2020

JMSE

View full text Add to dashboard Cite

show abstract

“…Moreover, a reliability evaluation can guide the maintenance of engineering staff. Subsea all-electric Christmas trees (XTs) are critical pieces of equipment in subsea production systems [5] and [6]. They are the only viable method for oil and gas development that can be utilized in some areas.…”

Section: Introductionmentioning

confidence: 99%

Research on a Real-time Reliability Evaluation Method Integrated with Online Fault Diagnosis: Subsea All-electric Christmas Tree System as a Case Study

Liu¹,

Shen²,

Cao³

2022

sv-jme

View full text Add to dashboard Cite

The subsea all-electric Christmas tree is key equipment in subsea production systems. If a failure occurs, the marine environment will be seriously polluted. Therefore, strict reliability analysis and measures to improve reliability must be performed before such equipment is launched, which is crucial to safe subsea production. A real-time reliability evaluation method for the all-electric Christmas tree mechanical system integrated with the static Bayesian network fault diagnosis stage is proposed in this paper, which realizes the identification of the fault type of the components and the real-time reliability evaluation of the mechanical system under different failure rates of the components. As a supplement to the method, by using mutual information to conduct sensitivity analysis on the reliability of the mechanical system, the importance of the basic events of each component on the reliability of the system is finally given. The proposed method provides significant theoretical support for the maintenance of the subsea all-electric Christmas tree and can be extended to the reliability evaluation of general subsea production systems.

show abstract

“…When the vortex shedding frequency approaches one of the natural frequency of the riser, the 'lock-in' phenomenon can occur, which if it is persistent may induce fatigue damage of the structure. A number of comprehensive reviews [1][2][3][4][5] discuss earlier studies of VIV were focussed on the multi-mode response, VIV response at high Reynolds numbers, flow-induced vibrations between multiple marine risers, VIV of inclined risers and intermittent VIV in oscillatory flows, impacts of the floating platforms and internal flows, and other effects.…”

Section: Introductionmentioning

confidence: 99%

Bifurcation analysis of vortex-induced vibration of low-dimensional models of marine risers

et al. 2021

View full text Add to dashboard Cite

A low dimensional model of a top tensioned riser (TTR) under excitations from vortices and timevarying tension is proposed, where the van der Pol wake oscillator is used to simulate the loading caused by the vortex shedding. The governing partial differential equations describing the fluid-structure interactions are formulated and multi-mode approximations are obtained using the Galerkin projection method. The one mode approximation is applied in this study and two different resonances are investigated by employing the method of multiple scales. They are the 1:1 internal resonance between the structure and wake oscillator (also known as 'lock-in' phenomenon) and the combined 1:1 internal and 1:2 parametric resonances. Bifurcations under the varying nondimensional shedding frequency for different mass-damping parameters are investigated and the results of multiple scale analysis are compared with direct numerical simulations. Analytical responses are calculated using the continuation method and their stability is determined by examining the eigenvalues of the corresponding characteristic equations. Effects of the system parameters including the amplitude of the tension variation, vortex shedding frequency and mass-damping parameter on the system bifurcations have been investigated. The analytical approach has allowed to probe bifurcations occurring in the system and to identify stable and unstable responses. It is shown that the combined resonances can induce large-

show abstract

A mini review of recent progress on vortex-induced vibrations of marine risers

Cited by 120 publications

References 159 publications

Accurate Depth Inversion Method for Coastal Bathymetry: Introduction of Water Wave High-Order Dispersion Relation

Accurate Depth Inversion Method for Coastal Bathymetry: Introduction of Water Wave High-Order Dispersion Relation

Research on a Real-time Reliability Evaluation Method Integrated with Online Fault Diagnosis: Subsea All-electric Christmas Tree System as a Case Study

Bifurcation analysis of vortex-induced vibration of low-dimensional models of marine risers

Contact Info

Product

Resources

About