Multilayer structures for high-intensity sound energy absorption in low-frequency range

Zhu, Junzhe; Gao, Hao; Dai, Shoubo; Qu, Yegao; Meng, Guang

doi:10.1016/j.ijmecsci.2023.108197

Cited by 11 publications

(3 citation statements)

References 76 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Для достижения этой цели необходимо контролировать формирование макро-, микро-и наноструктуры cтроительных материалов [11,12,13,14,15]. Важной особенностью звукопоглощающих материалов являются открытые поры, в которых звуковая энергия преобразуется в тепловую [16,17,18,19,20]. Однако материалы с открытой пористостью имеют высокую степень насыщения водой, что может негативно сказываться на эксплуатационных характеристиках их морозостойкости и долговечности.…”

Section: раздел IIIunclassified

Sound-absorbing aerated concrete based on China fly ash

Xiao

2023

Vestn. SibADI

View full text Add to dashboard Cite

Introduction. The development of aerated concrete with a high content of open pores, using polymineral binders with reduced cement content and significant utilization of local technogenic resources (in particular, enriched waste from thermal power plants) is relevant for the modern construction industry. To systematize modern methods for studying the characteristics of sound insulation and sound protection of buildings, it is necessary to take into account the diversity of international building codes. The aim of the work is to develop a scientifically based technological solution that provides effective aerated concrete based on fly ash from China with improved sound-absorbing characteristics.Main part. In this paper, a methodological basis, which provides for the comprehensive use of fundamental approaches in building materials science, was used. Integrated design to develop composite materials of a given quality at the nano-, micro- and macrolevels was used. The physical and mechanical properties of raw materials and the required characteristics of the developed materials using physicochemical methods of analysis, including laser granulometry, X-ray phase analysis, scanning electron microscopy, thermal methods, etc were studied. The experimental studies in the laboratories of V.G. Shukhov BSTU, as well as Chinese universities were carried out.Conclusions. In this work, scientific approaches for the design and synthesis of aerated concrete with improved acoustic characteristics in various regions of the country, taking into account local raw materials were formulated. Further research can be aimed at expanding the range of lightweight materials for building envelopes in order to ensure a safe human environment. This can be achieved by synthesizing multicomponent composite binders that affect the formation of nano-, micro- and macrostructures of materials.

show abstract

Section: раздел IIIunclassified

Sound-absorbing aerated concrete based on China fly ash

Xiao

2023

Vestn. SibADI

View full text Add to dashboard Cite

show abstract

“…In recent years, acoustic metamaterials with excellent low‐frequency sound absorption performance have provided new possibilities for solving such problems, and have rapidly developed into membrane‐type structure, resonance cavity‐like structure, slit‐type structure, and coiled‐up space structure. [ 1–6 ] In addition, research on traditional porous materials combined with acoustic metamaterials to improve their sound absorption performance is also extensively emerging. [ 7–11 ]…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, acoustic metamaterials with excellent low-frequency sound absorption performance have provided new possibilities for solving such problems, and have rapidly developed into membrane-type structure, resonance cavity-like structure, slit-type structure, and coiled-up space structure. [1][2][3][4][5][6] In addition, research on traditional porous materials combined with acoustic metamaterials to improve their sound absorption performance is also extensively emerging. [7][8][9][10][11] As a kind of acoustic metamaterial that can absorb low-frequency sound efficiently and reduce the thickness of structure significantly, the coiled-up space structure has been paid increasing attention.…”

Section: Introductionmentioning

confidence: 99%

Simulated and Experimental Research on Highly Efficient Sound Absorption of Low‐Frequency Broadband Acoustic Metamaterial Based on Coiled‐Up Space

Liang,

Wu,

Chen

et al. 2023

Adv Eng Mater

View full text Add to dashboard Cite

Acoustic metamaterials are broadly employed in the vibration and noise reduction fields for large defense industrial equipment such as engines and compressors thanks to their excellent subwavelength characteristics and extraordinary acoustic performance. However, the low‐frequency broadband sound absorption remains a thorny challenge in the scientific and engineering communities. This paper focuses on the low‐frequency broadband acoustic metamaterial composed of eight spiral absorbers coupled in two rows, researching its thermoviscous dissipation and sound absorption mechanism, and further analyzing its sound absorption characteristics. In the frequency range of 510‐990 Hz, the average sound absorption coefficient of acoustic metamaterial with sound absorption area ratio of 2.72% reaches 0.80, and the cross‐sectional height is only 34 mm, which achieves the tradeoffs between structural thickness, frequency bandwidth and sound absorption performance. Furthermore, continuous and highly efficient broadband sound absorption within the target frequency band in practical applications can be achieved by optimizing adjustable parameters. In addition, the finite element simulations are verified by experiments, which presents good agreement. Compared with traditional sound absorbing structure, the low‐frequency broadband acoustic metamaterial proposed in this paper owns the characteristics of small size and easy processing, which has broad application prospects in the field of low‐frequency noise control engineering.This article is protected by copyright. All rights reserved.

show abstract