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Nonlinear coupling characteristics between deep-draft cylindrical platform and moonpool
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Gao-ping ZHUa, b, Hai-ning LÜa, b, Rui QINa, b, Xiang-yu LIUa, b
Journal of Ship Mechanics | 2026, 30(5) : 684 - 698
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Journal of Ship Mechanics | 2026, 30(5): 684-698
• Hydrodynamics •
Nonlinear coupling characteristics between deep-draft cylindrical platform and moonpool
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Gao-ping ZHUa, b, Hai-ning LÜa, b, Rui QINa, b, Xiang-yu LIUa, b
Affiliations
  • a.Shanghai Jiao Tong University School of Ocean and Civil Engineering Shanghai 200240, China
  • b.Shanghai Jiao Tong University State Key Laboratory of Ocean Engineering, Shanghai 200240, China
Published: 2026-05-15 doi: 10.3969/j.issn.1007-7294.2026.05.003
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When the frequency of external wave excitation or that of platform motion approaches the natural frequency of the moonpool structure, intense resonance phenomena occur within the moonpool. Under such conditions, both the water inside the moonpool and the platform motion exhibit strong nonlinear characteristics. Based on computational fluid dynamics (CFD) principles, this study conducts numerical simulations of a deep-draft cylindrical platform under regular wave action to investigate the influence mechanisms of incident wave frequency and environmental wave height on the coupled system of platform motion and moonpool water dynamics. The results indicate that increasing environmental wave height intensifies nonlinear phenomena in the moonpool water motion, characterized by enhanced resonance peaks in high-frequency bands and reduced piston-mode resonance peaks. A strong coupling relationship exists between platform motion and moonpool water dynamics, where both the moonpool resonance phenomena and platform motion responses demonstrate dual-peak characteristics. As the environmental wave height increases, the heave response amplitude operator (RAO) amplitude decreases, while the platform’s pitch RAO amplitude increases.

moonpool resonance  /  environmental wave height  /  nonlinear characteristics  /  platform motion
Gao-ping ZHU, Hai-ning LÜ, Rui QIN, Xiang-yu LIU. Nonlinear coupling characteristics between deep-draft cylindrical platform and moonpool[J]. Journal of Ship Mechanics, 2026 , 30 (5) : 684 -698 . DOI: 10.3969/j.issn.1007-7294.2026.05.003
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doi: 10.3969/j.issn.1007-7294.2026.05.003
  • Receive Date：2025-08-06
  • Online Date：2026-07-07
  • Published：2026-05-15
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  • Received：2025-08-06
Affiliations
    a.Shanghai Jiao Tong University School of Ocean and Civil Engineering Shanghai 200240, China
    b.Shanghai Jiao Tong University State Key Laboratory of Ocean Engineering, Shanghai 200240, China
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表12种不同金属材料的力学参数
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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