An Analytical Procedure to Predict Transverse Vibration Response of Jack-Up Riser under the Random Wave Load

Wang, Fengde; Xiao, Wensheng; Yao, Yan‐an; Liu, Qi; Li, Changjiang

doi:10.1155/2020/5072989

Cited by 6 publications

(4 citation statements)

References 26 publications

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“…The dispersed energy spectrums appear in the vibration study of marine risers with time-varying boundary conditions and wave loads. 29 This phenomenon of energy transfer has been detected in the study of an axially accelerating viscoelastic beam. 30 The modal interactions from internal resonance cause significant variation of the steady-state responses.…”

Section: Introductionmentioning

confidence: 87%

Analysis of Resonance Suppression Performance of a Time-Varying Isolation Platform

Wang,

Liu,

Pan

2024

The International Journal of Acoustics and Vibration

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Expanding the low-frequency isolation range and suppressing the amplitude in the resonant region are important goals for vibration isolation in recent years. Various quasi-zero stiffness isolators and active isolators have emerged, achieving the expansion of the isolation range to low frequency. However, resonance suppression performance is limited by the damping structure and damping materials, making it difficult to achieve the ideal damping ratio. To simultaneously expand the low-frequency isolation range and suppress resonance, a time-varying isolation platform is proposed based on the resonant energy dispersion phenomenon of a time-varying structure. A finite element (FE) model of a fixed isolation platform is established to verify the low-frequency isolation range. One of the isolators slides along the flexible plate that changes the inherent characteristics of an isolation system which can suppress the formation of resonance. The effects of the time-varying path, damping and isolator stiffness on the amplitude in the resonant region are analyzed. The results demonstrate that the time-varying isolation platform not only has lower resonant frequency, but also can suppress the resonance peak to disperse the resonance energy in situations where system parameters are unidentified. The time-varying isolation platform provides a new approach for low frequency vibration isolation.

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Section: Introductionmentioning

confidence: 87%

Analysis of Resonance Suppression Performance of a Time-Varying Isolation Platform

Wang,

Liu,

Pan

2024

The International Journal of Acoustics and Vibration

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“…Wang et al proposed an analytical method to predict the transverse vibration response of a jack-up riser under random wave load, which is based on Euler-Bernoulli beam theory and Mindlin-Goodman method in the frequency domain. Experimental verification was conducted to validate the accuracy of the proposed method [10]. Several studies have demonstrated that both the top tension and internal fluid play crucial roles in influencing the dynamic response of the riser [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Dynamic behavior of risers under nonlinear oceanic environmental loading

Xu,

Yuan,

Luo

et al. 2023

J. vibroeng.

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The riser system acts as the vital link between the subsea blow-out preventer and the drilling platform. Affected by factors like top tension and marine environmental forces, the riser undergoes deformation and wear, carrying the risk of environmental pollution and financial losses upon failure. Hence, this study examines the riser's dynamic response to marine environmental loading. Initially, the motion differential equation for the riser system under the influence of nonlinear oceanic load is deduced using the principle of minimum potential energy and the variational method for extremum seeking. Subsequently, a nonlinear wave-current load model based on the Morrison equation is established, and the resulting equation is discretized into a finite element model using third-order Hermite interpolation function and the Galerkin weighted residual method. Finally, the dynamic response of the riser is scrutinized employing the Newmark numerical integration method. The study also investigates the impact of both oceanic environmental parameters and drilling parameters on the riser’s dynamic behavior. Comparative analysis of the numerical results reveals that the maximum displacement of the riser occurs at the middle section, whereas the maximum deflection angle is observed at the end of the riser. The periodicity of the deflection angle response is influenced by the position of the riser, showing a trend of decreasing and then increasing from the middle section towards the ends. Notably, the top tension and the velocity of the surface tidal current significantly affect the dynamic behavior of the riser. The findings of this study provide a theoretical foundation for the assessment of riser reliability and the determination of operational parameters.

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“…e SCR is a typical high flexible structure with a long span and low damping, making it susceptible to oscillations induced by a variety of internal and external sources [4]. During the past decades, extensive studies have been carried out to investigate the behavior of an SCR under vortexinduced vibration [5], internal slug flow-induced vibration [6], external flow-induced vibration [7], and vibration caused by the motion of the floating platform or other types of oil vessel [8,9], among others.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Flow-Induced Vibration of Steel Catenary Risers with Pounding Tuned Mass Damper

Zhang

Wang

Liu

et al. 2022

Shock and Vibration

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Steel catenary risers (SCR) have been widely used in the offshore oil industry. This paper proposes using a novel vibration control device, i.e., the pounding tuned mass damper (PTMD), to mitigate the flow-induced vibration of an SCR. The numerical model of the SCR and the PTMD has been established in ANSYS. The soil-pipe interaction is simulated by nonlinear springs based on p-y curves. A single degree of freedom structure is utilized to verify the PTMD model established in ANSYS using APDL. Afterwards, numerical studies are carried out to validate the vibration control performance of the proposed PTMD and to investigate the influence of mass ratio and the location of the PTMD. The numerical results imply that the PTMD is very effective in reducing the displacement of the SCR under different oceanic conditions. The vibration control effectiveness will increase with the increase in mass ratio. The maximum vibration reduction is achieved when the PTMD is located at the place where the largest amount of motion takes place.

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An Analytical Procedure to Predict Transverse Vibration Response of Jack-Up Riser under the Random Wave Load

Cited by 6 publications

References 26 publications

Analysis of Resonance Suppression Performance of a Time-Varying Isolation Platform

Analysis of Resonance Suppression Performance of a Time-Varying Isolation Platform

Dynamic behavior of risers under nonlinear oceanic environmental loading

Mitigation of Flow-Induced Vibration of Steel Catenary Risers with Pounding Tuned Mass Damper

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