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An improved topology optimization method to obtain excellent low-frequency sound absorption performance of underwater acoustic coatings
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Yan YAN1, Jun GUO2, Yang SHANGGUAN1, Tian-gui YE1, Guo-yong JIN1, Yun-tong BU1
Journal of Ship Mechanics | 2026, 30(2) : 307 - 314
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Journal of Ship Mechanics | 2026, 30(2): 307-314
• Hydro/Structural Acoustics •
An improved topology optimization method to obtain excellent low-frequency sound absorption performance of underwater acoustic coatings
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Yan YAN1, Jun GUO2, Yang SHANGGUAN1, Tian-gui YE1, Guo-yong JIN1, Yun-tong BU1
Affiliations
  • 1.Harbin Engineering University, Harbin 150001, China
  • 2.The 705 Research Institute of CSSC, Xi’an 710077, China
Published: 2026-02-15 doi: 10.3969/j.issn.1007-7294.2026.02.011
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With the continuous development of underwater detection technology towards low frequency domain, the sound absorption ability of conventional underwater acoustic coating needs to be significantly enhanced. In order to obtain better low-frequency sound absorption effect, a Topology-Shape-Topology (TST) optimization method is investigated in this paper. A new underwater acoustic coating is designed using the method which optimizes the distribution of materials in the anechoic layer. Compared with the traditional cavity-type acoustic coating, the acoustic structure designed by TST optimization method can achieve excellent sound absorption performance in the range of 200–1000 Hz. The peak value of sound absorption coefficient can come up to 0.9 at 321 Hz, and the average of sound absorption coefficient within the studied frequency range is above 0.8, resulting in an effective improvement of the low frequency sound absorption effect of the traditional underwater acoustic coating. Moreover, the underlying mechanism behind the sound absorption performance is revealed to obtain a further understanding of distribution regularities of materials. The study provides a new idea for the design of underwater acoustic coatings.

Topology-Shape-Topology optimization  /  low-frequency  /  sound absorption  /  acoustic coating
Yan YAN, Jun GUO, Yang SHANGGUAN, Tian-gui YE, Guo-yong JIN, Yun-tong BU. An improved topology optimization method to obtain excellent low-frequency sound absorption performance of underwater acoustic coatings[J]. Journal of Ship Mechanics, 2026 , 30 (2) : 307 -314 . DOI: 10.3969/j.issn.1007-7294.2026.02.011
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doi: 10.3969/j.issn.1007-7294.2026.02.011
  • Receive Date：2025-06-24
  • Online Date：2026-07-07
  • Published：2026-02-15
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  • Received：2025-06-24
Affiliations
    1.Harbin Engineering University, Harbin 150001, China
    2.The 705 Research Institute of CSSC, Xi’an 710077, China
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