Journal
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
Volume 41, Issue 3, Pages 1160-1177Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/14613484221081846
Keywords
Underwater anechoic coatings; functionally graded materials; local resonators; coupling application; low-frequency and broadband
Categories
Funding
- National Natural Science Foundation of China [51822902]
Ask authors/readers for more resources
The underwater anechoic coating with local resonant units is an effective method for low-frequency sound absorption, and embedding them in FGMs can improve the low-frequency and broadband sound absorption performance of the structure.
The underwater anechoic coating with local resonant units is an effective method to achieve low-frequency sound absorption. However, the structure obtained in this way is not satisfactory in the sound absorption effect of mid-high frequency bands. Capitalizing on the impedance gradient characteristics of functionally graded materials (FGMs) can improve the impedance matching between the structure and the medium, and enhance the dissipation of sound waves inside the structure. Based on these, we propose an underwater acoustic structure, which can improve and obtain low-frequency and broadband sound absorption performance by embedding local resonators into FGMs. To reveal the sound-absorbing mechanism and further optimize the low-frequency absorption performance of the structure, we conduct quantitative analyses on the parameters of FGMs, the materials and forms of resonators. The results indicate that by appropriately adjusting the studied parameters, different low-frequency sound-absorbing peak can be obtained and the absorption effects are also further improved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available