Structural galloping suppression with high-frequency flutter

International Journal of Mechanical Sciences, Год журнала: 2025, Номер unknown, С. 109928 - 109928

Опубликована: Янв. 1, 2025

Язык: Английский

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Suppression of wake-induced galloping of tandem cylinders by helical strakes

International Journal of Mechanical Sciences, Год журнала: 2024, Номер 273, С. 109301 - 109301

Опубликована: Апрель 16, 2024

Язык: Английский

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GTFE-Net-BiLSTM-AM: An intelligent feature recognition method for natural gas pipelines

Gas Science and Engineering, Год журнала: 2024, Номер 125, С. 205311 - 205311

Опубликована: Апрель 5, 2024

Язык: Английский

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Dynamic responses of the unbonded composite riser with multi-spacing coupling interference

Physics of Fluids, Год журнала: 2025, Номер 37(1)

Опубликована: Янв. 1, 2025

The interference among risers has always been a research focus within marine engineering. By riser, we mean the equipment that transports oil, gas, and other fluid media in environments, connecting offshore platform subsea wellhead. “unbonded composite riser-smooth riser” serves as object of this paper, which experimentally investigates riser group vibration with multi-spacings. This study reveals mechanism interlayer slip by reviewing dynamic response unbonded various arrangements. results indicate increasing displacement side-by-side is subjected to internal cable at high flow velocities. rate peaks, particularly S/D = 4 (S/D spacing ratio, where S represents distance between axis two D outer diameter riser). contrast, changes ratio have little influence on dominant frequency. strong energy dissipation capacity mass-damping efficiently decrease caused forces. Side-by-side occur delayed “lock-in” region opposed smooth under same conditions. Furthermore, wake clearance maximum difference up 5 times greater average value rate.

Язык: Английский

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Numerical study on the hydrodynamic performance of wave glider umbilical cables with different cross-sectional shapes

Ocean Engineering, Год журнала: 2025, Номер 325, С. 120800 - 120800

Опубликована: Март 5, 2025

Язык: Английский

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A deep modal model for reconstructing the VIV response of a flexible cylinder with sparse sensing data

Ocean Engineering, Год журнала: 2025, Номер 326, С. 120871 - 120871

Опубликована: Март 9, 2025

Язык: Английский

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Numerical prediction of vortex-induced vibrations of a long flexible cylinder with variable cross-sections

International Journal of Mechanical Sciences, Год журнала: 2025, Номер unknown, С. 110176 - 110176

Опубликована: Март 1, 2025

Язык: Английский

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Research on interface viscoelastic mechanical model based on modified cohesive zone and generalized Maxwell models

Ocean Engineering, Год журнала: 2025, Номер 332, С. 121381 - 121381

Опубликована: Май 3, 2025

Язык: Английский

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Coupling Effects of a Top-Hinged Buoyancy Can on the Vortex-Induced Vibration of a Riser Model in Currents and Waves

Journal of Marine Science and Engineering, Год журнала: 2024, Номер 12(5), С. 751 - 751

Опубликована: Апрель 30, 2024

In order to investigate the effects of top-end dynamic boundary risers caused by floater motions on their vortex-induced vibration (VIV) characteristics, a combined model comprising buoyancy can with relatively simple structural form and riser is taken as research object in present study. The aspect ratios are 5.37 250, respectively. A set experimental devices designed support VIV test stimulating motion (VIM) under different uniform flow regular wave conditions. Several data processing methods applied test, i.e., mode superposition, Euler angle conversion, band pass filter, fast Fourier transform, wavelet transform. Based testing results, effect low-frequency VIM high-frequency discussed relation single current, wave, current. It found that coupling presents certain orthogonal features at low current velocities. cross-flow component far more prominent than its counterpart, in-line VIM, increasing velocity. wave–current condition significantly enhances modulation amplitude frequency, resulting larger fluctuation peaks response further risk fatigue.

Язык: Английский

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Three-dimensional nonlinear vortex-induced vibrations of risers under internal gas-liquid and external shear flows

Applied Mathematical Modelling, Год журнала: 2024, Номер unknown, С. 115728 - 115728

Опубликована: Сен. 1, 2024

Язык: Английский

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