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Materials Science in Additive Manufacturing TPMS for perfect sound absorption

of multicavity-GP-Ⅰ and multicavity-GP-Ⅱ are 1550 and peak achieves perfect sound absorption. The semi-
816 Hz, respectively, demonstrating that the lower limit absorption bandwidth of multicavity-IWP increased
of the semi-absorption frequency of multicavity-GP-Ⅱ is to 5480 Hz, achieving broadband absorption
lower than that of multicavity-IWP. (iii). The graded design method can significantly broaden
The semi-absorption bandwidth (i.e., sound absorption the semi-absorption bandwidth of TPMS structures,
coefficient > 0.5) of TPMS structures is featured in and the sound absorption coefficient of the first
Figure 19C and D. The semi-absorption bandwidth of resonance peak can also be enhanced. The combination
uniform gyroid, primitive, IWP, and diamond structures of graded and multicavity designs can further enhance
increased non-linearly with increasing thickness. The semi- broadband and perfect sound absorption, decreasing
absorption bandwidth of Diamond-30 mm is 4990 Hz, the frequency band’s lower limit
which is the widest bandwidth among these four kinds of Acknowledgments
uniform TPMS structures. The broadband sound absorption
of TPMS structures in our research is better than the sound None.
absorption of TPMS structures with 5.8 × 5.8 × 5.8 mm cell
size. Through multicavity composite design, the semi- Funding
29
absorption bandwidth of multicavity-gyroid, multicavity- This research was funded by the Guangdong Basic and
primitive, multicavity-IWP, and multicavity-diamond Applied Basic Research Foundation (No. 2023A1515012704),
was altered by 327%, 474%, 12%, and −7.4%, respectively. GDA’s Project of Science and Technology Development
This finding suggests that the multicavity design can (No. 2022GDASZH-2022010107), Yangjiang City Key
significantly expand the semi-absorption bandwidth of Industry Talent Revitalization Plan Project for Alloy
gyroid and primitive structures, but it has little impact Materials and Hardware Scissors (Grant No. RCZX2023002),
on the semi-absorption bandwidth of IWP and diamond Undergraduate Innovation Team Project of Guangdong
structures. The semi-absorption bandwidth of GP-30 mm-Ⅰ Ocean University (No. CXTD2023021), and National College
and GP-30 mm-Ⅱ are 2720 and 4140 Hz, respectively, Students’ Innovation and Entrepreneurship Training Program
which are 240% and 417% higher than the semi-absorption Project of Guangdong Ocean University (No. 202310566036).
bandwidth of Primitive-30 mm. It is demonstrated that
the graded design also can significantly expand the semi- Conflict of interest
absorption bandwidth of primitive structures. Based on The authors declare that they have no known competing
the graded and multicavity designs, the semi-absorption financial interests or personal relationships that could have
bandwidth of multicavity-GP-Ⅰ and multicavity-GP-Ⅱ appeared to influence the work reported in this paper.
are 4750 and 5484 Hz, respectively. Multicavity-GP-Ⅱ
has the widest semi-absorption bandwidth among the Author contributions
TPMS structures in this study. Therefore, the graded and Conceptualization: Mingkang Zhang
multicavity coupling designs can further enhance the semi- Formal analysis: Mingjian Deng, Chang Liu, Wenbin Liu
absorption bandwidth of TPMS structures.
Funding acquisition: Mingkang Zhang, Jie Chen
4. Conclusion Investigation: Jie Chen, Mingkang Zhang, Mingjian Deng
Methodology: Mingjian Deng, Wenbin Liu
This study proposes design methods for TPMS Project administration: Mingkang Zhang, Jie Chen
structures with broadband and perfect sound absorption Supervision: Guanhao Wang
manufactured by additive manufacturing, including Writing – original draft: Mingkang Zhang
multicavity design and graded design. The key findings Writing – review & editing: Mingkang Zhang, Mingjian
obtained are as follows: Deng, Jie Chen
(i). As the thickness of TPMS structures increases, Visualization: Guanhao Wang, Sihua Yin
the noise reduction coefficient of TPMS structures
increases linearly, and the first resonance frequency All authors have read and agreed to the published
decreases. The acoustic bandgap of TPMS structures version of the manuscript.
shifts to a lower frequency as the thickness increases. Ethics approval and consent to participate
The order of noise reduction coefficient is: diamond
> IWP > gyroid > primitive Not applicable.
(ii). The TPMS structures with multicavity design have
multiple resonance peaks. The five resonance peaks Consent for publication
of multicavity-IWP are above 0.94, and the third Not applicable.

Volume 4 Issue 1 (2025) 19 doi: 10.36922/msam.5737