Low-Frequency Bandgaps of the Lightweight Single-Phase Acoustic Metamaterials with Locally Resonant Archimedean Spirals

Gao, Haoqiang; Yan, Qun; Liu, Xusheng; Zhang, Ying; Sun, Yongtao; Ding, Qian; Wang, Liang; Xu, Jinxin; Yan, Hao

doi:10.3390/ma15010373

Cited by 17 publications

(9 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The geometric schematic diagram of typical twodimensional chiral structures and spiral structures is shown in figure 3. Model 1, model 2, and model 3 represent the models in [55][56][57], respectively. Where a represents the unit cell lattice length, and t represents the ligament thickness of the structure.…”

Section: Characterization Of Chiral Spiral Structurementioning

confidence: 99%

Low-frequency band gap design of acoustic metamaterial based on cochlear structure

Ruan,

Yu,

Hou

et al. 2024

Smart Mater. Struct.

View full text Add to dashboard Cite

In this paper, a new chiral spiral structure based on the cochlear structure is proposed. The chiral spiral structure consists of four orthogonally oriented cochlear structures with the same geometric parameters connected at the inner endpoints of the four cochlear structures. Based on the Bloch’s theory and finite element method (FEM), the band gap characteristics of the proposed chiral spiral structure are studied. The effects of ligament bending angle (θ), the ratio of arc radius of cochlear contour (α), the ligament thickness (tc), and the level of the chiral spiral structure (n) on the chiral spiral structure are discussed. The results show that the two-level chiral spiral structure (n = 2) has the best band gap characteristics when θ = 180° and α = 0.45. With the decrease of tc and the increase of n, the opening frequency of the first band gap gradually decreases. When n = 22, the chiral spiral structure has the lowest opening frequency, 1.91 Hz. The existence of the band gap is verified through the low amplitude elastic wave transmission tests. The distribution of the iso-frequency lines indicates that with the increase of the level of the chiral spiral structure (n), the propagation of elastic waves of the chiral spiral structure shows more distinct directivity, which provides a basis for the propagation control of elastic waves. These findings can provide new design ideas and directions for low-frequency vibration and noise control.

show abstract

Section: Characterization Of Chiral Spiral Structurementioning

confidence: 99%

Low-frequency band gap design of acoustic metamaterial based on cochlear structure

Ruan,

Yu,

Hou

et al. 2024

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…A novel avenue for lightweight research has emerged through the optimization of core's topologies. Diverse periodic sandwich structures, including grid [9,10,11] , laminated [12,13] , pyramidal [14,15,16] , curved[ 17 , 18 and other types of lattices [19,20] have been produced.…”

Section: Introductionmentioning

confidence: 99%

Load-bearing behaviors of sandwich plates with non-uniformly distributed grid cores: Dynamic impact and blast

Wang,

Ruan,

Hao

et al. 2024

Preprint

View full text Add to dashboard Cite

Sandwich plates with grid-core structures possess extensive applications, and non-uniform grid plates (NUGPs) show enhanced potential under varied loading modes. The current study embarks on an investigation into non-uniform grid-core plates (NUGP) by adjusting the dimensions of transverse and longitudinal grid walls. This comprehensive analysis explores the dynamic responses of these plates when subjected to impact and blast loads, focusing on deformation patterns, damage, and the underlying processes. The findings are illustrated as follows. 1) NUGPs, specifically those with an optimized configuration of grid walls termed the d2 structure, display improved resistance to blast and impact loads compared to their uniformly distributed grid plate counterparts. Notably, designs featuring a less dense grid in the central area yield a more evenly distributed damage pattern under impact loads and a lesser severity of damage from blast loads. 2) The study also reveals that under impact loads, the sandwich structure showcases distinct behaviors through three stages evident in the load-displacement curves: initial localized indentation, followed by overall deformation, and ending with deformation recovery. 3) Moreover, when facing blast loads, the initial response involves rapid plastic deformation of the upper skin, succeeded by compression and buckling of the core. This sequence effectively dissipates energy, acting as a protective shield for the lower skin. 4) The optimized NUGP design achieves a perfect balance between stiffness and ductility, reducing displacement through adequate stiffness while ensuring the effective absorption of dynamic forces through significant ductility, thus preventing catastrophic failure. This research significantly advances topology optimization for sandwich plates, providing essential insights for designing lightweight structures resilient under various modes.

show abstract

“…Numerical calculations and experiments proved that trampoline spiral slot plates had the advantages of a wide elastic wave band gap, being lightweight, and being small. Gao et al 34 combined the square honeycomb structure with the Archimedes helical structure and utilized the local resonance characteristics of multiple Archimedes helical acoustic metamaterials to achieve multiple low-frequency band gaps in the frequency range of 184.5–500 Hz, which guided low-frequency noise and vibration control.…”

Section: Introductionmentioning

confidence: 99%

Effect of geometrical parameters and additional mass on the acoustic and vibration control of the bilayer resonant metamaterials

Liu

Hao

Chen

2023

International Journal of Aeroacoustics

View full text Add to dashboard Cite

Due to the advantages of lightweight, small size, high stiffness, and adjustable parameters, plate metamaterials have shown great practical application value in the field of acoustic vibration control in engineering. For low-frequency vibration and noise control, an annular slotted bilayer plate metamaterial is designed, which can realize sound insulation and vibration reduction at 100–150 Hz (low-frequency range). By changing the geometric parameters of the annular slotted bilayer plate, the structural parameters of the additional mass, the material parameters, and its distribution position, the acting frequency band is reduced and the band gap of sound insulation and vibration reduction is widened. The integral metamaterial panels of circular and square PA12 were fabricated by 3D printing technology, and then, the acoustic and vibration characteristics were tested in the ZK1030 impedance tube system and Polytec full-field scanning laser vibration measurement system, respectively. The results show that the structure has the best performance by varying the resonant ring thickness of the lattice structure, controlling the wave incidence angle to 0°, and pointing force excitation in the X direction. However, when the mass of the additional mass block is certain, the distribution position of the mass block has less effect. The experimental result was reasonably consistent with the simulation analysis result. This work can provide a reference for the design of bilayer plate acoustic metamaterials with low-frequency broadband acoustic insulation and low-damping vibration based on periodic structures in engineering.

show abstract

Low-Frequency Bandgaps of the Lightweight Single-Phase Acoustic Metamaterials with Locally Resonant Archimedean Spirals

Cited by 17 publications

References 38 publications

Low-frequency band gap design of acoustic metamaterial based on cochlear structure

Low-frequency band gap design of acoustic metamaterial based on cochlear structure

Load-bearing behaviors of sandwich plates with non-uniformly distributed grid cores: Dynamic impact and blast

Effect of geometrical parameters and additional mass on the acoustic and vibration control of the bilayer resonant metamaterials

Contact Info

Product

Resources

About