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Numerical analysis of the influence of underwater structure pitching motion on its hydrodynamic pressure field
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Xue-zhi LI3, Song LI1, 2, 3, Lan-yue ZHANG1, 2, 3, Jiang-yi ZHANG1, 2, 3, Chen-xuan JING3
Journal of Ship Mechanics | 2024, 28(10) : 1541 - 1558
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Journal of Ship Mechanics | 2024, 28(10): 1541-1558
• Hydrodynamics •
Numerical analysis of the influence of underwater structure pitching motion on its hydrodynamic pressure field
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Xue-zhi LI3, Song LI1, 2, 3, Lan-yue ZHANG1, 2, 3, Jiang-yi ZHANG1, 2, 3, Chen-xuan JING3
Affiliations
  • 1.Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
  • 2.Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University), Ministry of Industry and Information Technology, Harbin 150001, China
  • 3.College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China
Published: 2024-10-20 doi: 10.3969/j.issn.1007-7294.2024.10.008
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To study the influence of the pitching and translational coupling motion of underwater structure on its hydrodynamic pressure field, the potential flow theory was used to analyze the hydrodynamic pressure field of the coupling motion of the structure. The overlapping grid technology was used to analyze the hydrodynamic pressure field of the structure in the four motion states of translational motion, translational motion with attack angle, pitching motion, and pitching translation coupling. Taking elliptical structures of different axial length ratios as the research object, the hydrodynamic pressure field under different angular velocities was analyzed. The results show that the pitching motion of the elliptical structure will make the negative pressure peak of the hydrodynamic pressure field curve shift with time. The larger the angle of pitching oscillation is, the greater the negative pressure peak shifts. In addition, the axial length ratio of the elliptical structure will also affect the offset degree of the curve. The spectrum of the hydrodynamic pressure field caused by the pitching oscillation of the elliptical structure has a very low frequency spectrum peak. The frequency corresponding to the peak of the spectrum is consistent with that of the elliptical structure oscillation.

hydrodynamic pressure field  /  ellipse  /  pitching motion  /  overlapping grid
Xue-zhi LI, Song LI, Lan-yue ZHANG, Jiang-yi ZHANG, Chen-xuan JING. Numerical analysis of the influence of underwater structure pitching motion on its hydrodynamic pressure field[J]. Journal of Ship Mechanics, 2024 , 28 (10) : 1541 -1558 . DOI: 10.3969/j.issn.1007-7294.2024.10.008
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Article Info
doi: 10.3969/j.issn.1007-7294.2024.10.008
  • Receive Date：2024-04-20
  • Online Date：2026-03-26
  • Published：2024-10-20
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  • Received：2024-04-20
Funding
Affiliations
    1.Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
    2.Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University), Ministry of Industry and Information Technology, Harbin 150001, China
    3.College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, 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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