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Research on identification of acoustic radiation hotspots and active control mechanism of underwater cylindrical shell
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Jin-yan ZHENG1, Wen-kai DONG1, Ying-long ZHAO2, 3, Mei-xia CHEN1
Journal of Ship Mechanics | 2025, 29(12) : 1978 - 1990
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Journal of Ship Mechanics | 2025, 29(12): 1978-1990
• Hydro/Structural Acoustics •
Research on identification of acoustic radiation hotspots and active control mechanism of underwater cylindrical shell
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Jin-yan ZHENG1, Wen-kai DONG1, Ying-long ZHAO2, 3, Mei-xia CHEN1
Affiliations
  • 1.School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
  • 2.Institute of Noise and Vibration, Naval University of Engineering, Wuhan 430033, China
  • 3.National Key Laboratory on Ship Vibration & Noise, Wuhan 430033, China
Published: 2025-12-15 doi: 10.3969/j.issn.1007-7294.2025.12.014
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Accurately identifying the far-field radiation hotspots of structures is of great significance for vibration and sound radiation control. In this paper, an open-source boundary element program is used to obtain the radiation impedance matrix of the cylindrical shell, and the normal vibration velocity of the shell is extracted. Based on the singular value decomposition, the non-negative intensity and radiated sound power of the underwater cylindrical shell are obtained, and the far-field acoustic radiation model is acquired, moreover, the method is verified by finite element software. On this basis, the influence of large stiffener at the stucture, where an excitation force is applied, on non-negative intensity is discussed. Furthermore, the mathematical model of active control is established with the aim of minimizing the acoustic radiation power. The influence of control force on structural sound radiation mode is analyzed, and its influence mechanism is revealed using the non-negative intensity distribution. The results show that the radiation mode of the structural surface must be changed to reduce the radiation acoustic power. And the essence of secondary force controlling structural vibration radiation is to change the structural vibration from strong radiation mode to weak mode, thus reducing the radiation efficiency of the structure.

acoustic radiation  /  non-negative intensity  /  active control
Jin-yan ZHENG, Wen-kai DONG, Ying-long ZHAO, Mei-xia CHEN. Research on identification of acoustic radiation hotspots and active control mechanism of underwater cylindrical shell[J]. Journal of Ship Mechanics, 2025 , 29 (12) : 1978 -1990 . DOI: 10.3969/j.issn.1007-7294.2025.12.014
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Article Info
doi: 10.3969/j.issn.1007-7294.2025.12.014
  • Receive Date：2025-04-25
  • Online Date：2026-07-07
  • Published：2025-12-15
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  • Received：2025-04-25
Affiliations
    1.School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
    2.Institute of Noise and Vibration, Naval University of Engineering, Wuhan 430033, China
    3.National Key Laboratory on Ship Vibration & Noise, Wuhan 430033, 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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