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Experimental study on wave impact pressure and impulse of a plat-square column structure under focused waves
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Nian-fan ZHANG1, 2, Ming-yue LIU1, 2, Long-fei XIAO1, 2, Ying-hao GUO1, 2, Gang CHEN1, 3
Journal of Ship Mechanics | 2025, 29(8) : 1188 - 1200
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Journal of Ship Mechanics | 2025, 29(8): 1188-1200
• Hydrodynamics •
Experimental study on wave impact pressure and impulse of a plat-square column structure under focused waves
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Nian-fan ZHANG1, 2, Ming-yue LIU1, 2, Long-fei XIAO1, 2, Ying-hao GUO1, 2, Gang CHEN1, 3
Affiliations
  • 1.State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • 2.SJTU-Sanya Yazhou Bay Institute of Deepsea Science and Technology, Sanya 572024, China
  • 3.Marine Design and Research Institute of China, CSSC, Shanghai 200011, China
Published: 2025-08-20 doi: 10.3969/j.issn.1007-7294.2025.08.002
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To investigate the impact of extreme waves, based on the physical model test in a wave tank, this paper aims to study the characteristics of wave impact pressure and impulse generated by focused waves with different breaking stages on a plate-square column structure. Wavelet denoising, empirical mode decomposition, and local weighted linear regression methods were used to process the experimental data. The wave pressure at different parts of square columns was obtained, and the temporal and spatial distribution features of wave pressure were explored. Based on the time integral of wave impact pressure, the time-varying characteristics of the pressure impulse at the typical part of the structure were analyzed. Additionally, the effects of wave breaking stage, initial air gap, and trim angle on the spatial variation of pressure impulse were discussed in detail. The results show that the maximum impact pressure impulse generated by the focused waves is significantly affected by the breaking stage, the initial air gap, and the trim angle. Waves with crest curling or even premature breaking usually produce larger impact pressure impulses. Meanwhile, the plate-square column structure with small initial air gap and positive trim angle is subjected to a larger impact pressure impulse. This study provides a valuable reference for further investigation of the impact of extreme waves on semi-submersible platforms.

impact pressure  /  pressure impulse  /  spatial variation  /  model test  /  focused wave  /  wave breaking
Nian-fan ZHANG, Ming-yue LIU, Long-fei XIAO, Ying-hao GUO, Gang CHEN. Experimental study on wave impact pressure and impulse of a plat-square column structure under focused waves[J]. Journal of Ship Mechanics, 2025 , 29 (8) : 1188 -1200 . DOI: 10.3969/j.issn.1007-7294.2025.08.002
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Article Info
doi: 10.3969/j.issn.1007-7294.2025.08.002
  • Receive Date：2025-02-12
  • Online Date：2026-03-26
  • Published：2025-08-20
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  • Received：2025-02-12
Funding
Affiliations
    1.State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    2.SJTU-Sanya Yazhou Bay Institute of Deepsea Science and Technology, Sanya 572024, China
    3.Marine Design and Research Institute of China, CSSC, Shanghai 200011, 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
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Percentage of total
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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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