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Fatigue strength of connection system of large offshore floating platform
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Liang-bi LI1, Peng-fei YU1, Yue HAN2, Shi-yu ZHANG3, Lei-lei LIU4, Jin-hui JIANG5, 6
Journal of Ship Mechanics | 2025, 29(12) : 1943 - 1952
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Journal of Ship Mechanics | 2025, 29(12): 1943-1952
• Structural Mechanics •
Fatigue strength of connection system of large offshore floating platform
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Liang-bi LI1, Peng-fei YU1, Yue HAN2, Shi-yu ZHANG3, Lei-lei LIU4, Jin-hui JIANG5, 6
Affiliations
  • 1.Jiangsu University of Science and Technology, Zhenjiang 212003, China
  • 2.China Ship and Ocean Engineering Design and Research Institute, Shanghai 200011, China
  • 3.Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 201324, China
  • 4.Shanghai Ship Research and Design Institute, Shanghai 201203, China
  • 5.Key Laboratory of Marine Technology Ministry of Communications/State Key Laboratory of Maritime Technology and Safety, Shanghai Ship and Shipping Research Institute Co., Ltd., Shanghai 200135, China
  • 6.Shanghai Jiao Tong University, Shanghai 200240, China
Published: 2025-12-15 doi: 10.3969/j.issn.1007-7294.2025.12.011
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Large-scale offshore floating platforms belons to special offshore structures. Their bearing pin shaft connection structures have good flexibility and applicability. In order to ensure the safety of the large-scale offshore floating platform connection system during service, it is necessary to analyze its fatigue life. Firstly, the large-scale offshore floating platform connection system with multiple sets of bearing pin shaft was studied. A nonlinear contact analysis method of various contact forms was adopted to investigate the overall strength of the structure under the design working condition load. Then, the fatigue life of the platform connection system was calculated and analyzed before and after the local structural improvement. The results show that, for large-scale offshore floating platform with multiple sets of bearing pinsnajt, the lowest fatigue life appears at the flat steel of the connection between the outermost bearing and the plate-frame structure of the loading end. In addition, the fatigue life could be effectively improved by increasing the overall plate thickness of the outermost bearing base plate-frame at the loading end. The thickness of the plate-frame and flat steel near the opening should also be increased. In this paper, a set of fatigue strength analysis methods for large offshore floating platform connection system with multiple sets of bearing pin shaft is finally formed.

floating platform  /  connection structure  /  bearing pin and shaft  /  fatigue life  /  Finite Element Method (FEM)
Liang-bi LI, Peng-fei YU, Yue HAN, Shi-yu ZHANG, Lei-lei LIU, Jin-hui JIANG. Fatigue strength of connection system of large offshore floating platform[J]. Journal of Ship Mechanics, 2025 , 29 (12) : 1943 -1952 . DOI: 10.3969/j.issn.1007-7294.2025.12.011
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Year 2025 volume 29 Issue 12
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Article Info
doi: 10.3969/j.issn.1007-7294.2025.12.011
  • Receive Date：2025-07-23
  • Online Date：2026-07-07
  • Published：2025-12-15
Article Data
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History
  • Received：2025-07-23
Affiliations
    1.Jiangsu University of Science and Technology, Zhenjiang 212003, China
    2.China Ship and Ocean Engineering Design and Research Institute, Shanghai 200011, China
    3.Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 201324, China
    4.Shanghai Ship Research and Design Institute, Shanghai 201203, China
    5.Key Laboratory of Marine Technology Ministry of Communications/State Key Laboratory of Maritime Technology and Safety, Shanghai Ship and Shipping Research Institute Co., Ltd., Shanghai 200135, China
    6.Shanghai Jiao Tong University, Shanghai 200240, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
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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