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Research and experiment on patch near-field acoustic holography based on two-level iteration
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Kai CHAIa, Jing-jun LOUa, b, Rong-hua LIb, Jun-bo HUa
Journal of Ship Mechanics | 2024, 28(9) : 1441 - 1450
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Journal of Ship Mechanics | 2024, 28(9): 1441-1450
• Hydro/Structural Acoustics •
Research and experiment on patch near-field acoustic holography based on two-level iteration
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Kai CHAIa, Jing-jun LOUa, b, Rong-hua LIb, Jun-bo HUa
Affiliations
  • a.College of Naval Architecture and Ocean, Naval University of Engineering, Wuhan 430033, China
  • b.College of Power Engineering, Naval University of Engineering, Wuhan 430033, China
Published: 2024-09-20 doi: 10.3969/j.issn.1007-7294.2024.09.014
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In order to effectively reduce the ‘window effect’ in the sound field reconstruction process of near-field acoustic holography (NAH) and accurately measure and locate the surface sound source of a submarine by using the limited measuring aperture, a patch NAH method based on two-level iteration was proposed. Firstly, patch NAH based on orthogonal spherical waves was improved, and a patch NAH method based on two-level iteration was proposed. Then, the reconstruction results of the two NAH methods were simulated and compared, and the influence of extrapolation error and extended measurement points on the reconstruction accuracy was studied. Finally, the experimental study of patch NAH based on two-level iteration was carried out in an anechoic tank using a small aperture holographic measuring surface. The results show that the patch NAH based on two-level iteration proposed in this paper can greatly reduce the ‘window effect’ and ‘aperture repetition effect’ errors caused by the limited measurement aperture, which verifies the advantages of the method and provides an important reference for NAH precise measurement of large size sound sources.

patch near-field acoustic holography (NAH)  /  extrapolation in wavenumber domain  /  window effect  /  two-level iteration  /  noise source identification
Kai CHAI, Jing-jun LOU, Rong-hua LI, Jun-bo HU. Research and experiment on patch near-field acoustic holography based on two-level iteration[J]. Journal of Ship Mechanics, 2024 , 28 (9) : 1441 -1450 . DOI: 10.3969/j.issn.1007-7294.2024.09.014
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Year 2024 volume 28 Issue 9
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doi: 10.3969/j.issn.1007-7294.2024.09.014
  • Receive Date：2024-03-30
  • Online Date：2026-03-26
  • Published：2024-09-20
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  • Received：2024-03-30
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    a.College of Naval Architecture and Ocean, Naval University of Engineering, Wuhan 430033, China
    b.College of Power Engineering, Naval University of Engineering, Wuhan 430033, China
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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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