Analysis of Vortex-induced Vibration and Fatigue Characteristics of High-pressure Riser in Shallow Sea

doi:10.11885/j.issn.1674-5086.2022.06.20.01

Abstract

Abstract: With the continuous development of oil and gas resources in the East China Sea, jack-up platforms with lower development costs will be widely used. The marine environment where the riser is located is complex and changeable. Due to the large ratio of structural length to diameter, vortex-induced vibrations will occur under the action of ocean currents. In this paper, the wake oscillator model is used to predict the vortex-induced vibration of the high-pressure riser. Based on the content of the DNV specification, the S-N curve method is used to calculate the structural fatigue. The model is discretely solved by the finite difference method. The research focuses on the influence of the top tension with the vortex-induced vibration and fatigue characteristics of the riser. It is found that the top tension will affect the vortex-induced vibration response of the riser, and further change the fatigue life of the structure, and head affect the safety of the structure.

Key words: jack-up platform, high pressure riser, vortex-induced vibration, fatigue damage, wake oscillator model, finite difference

CLC Number:

TE832
TV312

JIANG Yufeng, XU Wanhai. Analysis of Vortex-induced Vibration and Fatigue Characteristics of High-pressure Riser in Shallow Sea[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2024, 46(3): 102-108.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2022.06.20.01

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2024/V46/I3/102

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