Jihong Wen
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View article: Mechanism and Optimization of Acoustic Absorption of an Underwater Lattice-Reinforced Meta-Absorber
Mechanism and Optimization of Acoustic Absorption of an Underwater Lattice-Reinforced Meta-Absorber Open
Conventional rubber-based absorbers containing cavities exhibit a decline in acoustic absorption as hydrostatic pressure rises. To improve sound absorption performance under hydrostatic pressure, a lattice-reinforced meta-absorber (LRMA) i…
View article: Pre‐Torsion Tubular Metamaterials: Multi‐Effect Integration for Advanced Functional Applications
Pre‐Torsion Tubular Metamaterials: Multi‐Effect Integration for Advanced Functional Applications Open
Mechanical metamaterials continuously push the boundaries of mechanical properties far beyond conventional materials. However, a critical step toward the applications of metamaterials lies in combining multiple effects and functionalities …
View article: Vibration control of thin-walled circular plate structures based on piezoelectric shunt arrays
Vibration control of thin-walled circular plate structures based on piezoelectric shunt arrays Open
This study systematically investigates the effectiveness of piezoelectric shunt damping technology in vibration control for thin-walled circular plate structures using the commercial finite element analysis software COMSOL. The experimenta…
View article: Enhanced low-frequency wideband vibration mitigation of an acoustic black hole beam utilizing coupled distributed dynamic absorbers
Enhanced low-frequency wideband vibration mitigation of an acoustic black hole beam utilizing coupled distributed dynamic absorbers Open
Acoustic Black Holes (ABHs) have garnered significant attention in recent years due to their unique ability to focus vibration energy. The integration of ABHs' broadband focusing properties with the precision tuning capabilities of Dynamic…
View article: Non-invasive in-situ monitoring of deep etching processes using terahertz metasurfaces
Non-invasive in-situ monitoring of deep etching processes using terahertz metasurfaces Open
This study presents an in-situ and non-invasive process control and monitoring (PCM) method for deep silicon etching, leveraging terahertz metasurfaces. The technique addresses the challenges for monitoring deep and high aspect ratio etchi…
View article: Ultra-broadband sound-absorbing metastructure with Helmholtz resonator and porous material modulation crown
Ultra-broadband sound-absorbing metastructure with Helmholtz resonator and porous material modulation crown Open
The development of sound-absorbing metamaterials/metastructures provides a new way to solve the problem of low-frequency and broadband sound absorption. However, designing ultra-broadband sound-absorbing metamaterials/metastructures with s…
View article: Nonlinear metamaterial enabled aeroelastic vibration reduction of a supersonic cantilever wing plate
Nonlinear metamaterial enabled aeroelastic vibration reduction of a supersonic cantilever wing plate Open
The violent vibration of supersonic wings threatens aircraft safety. This paper proposes the strongly nonlinear acoustic metamaterial (NAM) method to mitigate aeroelastic vibration in supersonic wing plates. We employ the cantilever plate …
View article: Mechanism analysis and optimal design of sound-absorbing metastructure constructed by slit-embedded Helmholtz resonators
Mechanism analysis and optimal design of sound-absorbing metastructure constructed by slit-embedded Helmholtz resonators Open
Low-frequency noise has always been a thorny problem in the field of noise control. In recent years, the development of sound-absorbing metastructures has provided new ideas for controlling low-frequency noise. In this work, we propose a l…
View article: Breaking the mass law for broadband sound insulation through strongly nonlinear interactions
Breaking the mass law for broadband sound insulation through strongly nonlinear interactions Open
Sound transmission through panels is governed by the well-known mass law in the mid-frequency range. This paper reveals a possibility of breaking this density-dominant law through strongly nonlinear interaction, while broadening the bandwi…
View article: Stabilise and symmetrise the deformation of buckling metamaterial for tunable vibration bandgaps
Stabilise and symmetrise the deformation of buckling metamaterial for tunable vibration bandgaps Open
Mechanical metamaterials have attracted extensive attention. This paper reports a metamaterial with tunable elastic wave bandgaps based on bistable buckling structure. First, we find that deformation of two symmetric buckling shells is int…
View article: Research Progress of Acoustic Metamaterials for Vibration and Noise Reduction Applications
Research Progress of Acoustic Metamaterials for Vibration and Noise Reduction Applications Open
摘要: 声学超构材料是由阵列化的人工微结构单元构筑的复合声学材料/结构。通过对声学超构材料中的微结构单元及其排布方式进行调控设计,可以实现对声波/弹性波(可视为固体中的声波)的人为高效操控,使其表现出超常的减振降噪性能及优势。当前,声学超构材料研究已成为机械工程、声学、力学、材料学、物理学等多学科交叉领域关注的热点方向。针对机械工程领域关注的装备振动与噪声控制技术背景,重点综述面向减振降噪应用的声学超构材料研究进展,分别从减振、隔声、吸声等功能应用需求出发,回顾国内外相关声…
View article: Low-frequency waterborne sound insulation by an acoustic metascreen with a metal chiral structure
Low-frequency waterborne sound insulation by an acoustic metascreen with a metal chiral structure Open
Low sound speed or low-density materials can be used as soft acoustic boundaries in water, potentially as low-frequency underwater sound insulation. This study uses a chiral structure to construct an acoustic metascreen with deep subwavele…
View article: A nonlinear metamaterial plate for suppressing vibration and sound radiation
A nonlinear metamaterial plate for suppressing vibration and sound radiation Open
Nonlinear acoustic metamaterials (NAMs) exhibit extraordinary properties for low-frequency and broadband vibration mitigation. Despite the increasing attention received, exotic properties and the physical mechanisms underpinning NAM-enable…
View article: Broadband Transformation Acoustic Waveguide With Anisotropic Density Based on Pentamode Metamaterials
Broadband Transformation Acoustic Waveguide With Anisotropic Density Based on Pentamode Metamaterials Open
Multiple layer anisotropic fluid medium is critical to the realization of transformation acoustic devices, such as cloak or bend waveguide. Pentamode metamaterials have attracted extensive attention as a solid artificial version with aniso…
View article: Acoustic absorption of a metamaterial panel: Mechanism, boundary effect and experimental demonstration
Acoustic absorption of a metamaterial panel: Mechanism, boundary effect and experimental demonstration Open
The present paper investigates absorption of a metamaterial panel composed of a flexible micro-perforated panel attached periodically with local resonators. It gains good agreement between the results of the theoretical prediction and fini…
View article: Absorption Mechanism and Optimization of a Subwavelength Acoustic Absorber
Absorption Mechanism and Optimization of a Subwavelength Acoustic Absorber Open
A subwavelength acoustic absorber based on parallel coupled Helmholtz resonators is designed to extend the absorption band, where the lateral space is used and verified to reduce the overall thickness. Both theoretical analysis and finite …
View article: Improvement of sound absorption and insulation using a double-layer metamaterial
Improvement of sound absorption and insulation using a double-layer metamaterial Open
Improvement of sound absorption and insulation using a double-layer metamaterial (DM) in the acoustic free field is proposed in the present paper. The front layer of the DM is composed of a flexible micro-perforated plate with periodic loc…
View article: Ultrabroad acoustical limiting in nonlinear metamaterials due to adaptive-broadening band-gap effect
Ultrabroad acoustical limiting in nonlinear metamaterials due to adaptive-broadening band-gap effect Open
Material band structure is key foundation for various modern technologies, but it was regarded as a space-time invariant feature. Acoustic metamaterials show extraordinary properties for processing elastic waves, but conventional realizati…
View article: Design of subwavelength broadband hybrid sound absorption structure based on micro-perforated plate and coiled channels
Design of subwavelength broadband hybrid sound absorption structure based on micro-perforated plate and coiled channels Open
In this paper, we propose a hybrid subwavelength broadband sound absorber based on micro perforated plate and multiple coiled channels. And the mechanism of low frequency broadband sound absorption of the hybrid sound absorber is analyzed …
View article: 1/2 sub-harmonic resonance in bistable structure and its effect on vibration isolation characteristics
1/2 sub-harmonic resonance in bistable structure and its effect on vibration isolation characteristics Open
In the extensive modern applications, the low-frequency and heavy-load isolators are needed to reduce the vibration transmissions. The unique properties of nonlinear systems, such as jumping, bifurcation and chaos, provide new ideas for de…
View article: Hybrid meta-structure for broadband waterborne sound absorption
Hybrid meta-structure for broadband waterborne sound absorption Open
A new hybrid-mechanism metastructure combined resonances of locally resonant scatterers and air cavities is proposed for broadband waterborne sound absorption. In the design, the locally resonant scatterers are embedded into the backing pl…
View article: Quasi-perfect absorption achieved throughout low frequency range via acoustic meta-surface
Quasi-perfect absorption achieved throughout low frequency range via acoustic meta-surface Open
In this work, we propose a novel design of acoustic meta-surface with coplanar coiled channels and double apertures. Tunable-broadband (30–300 Hz) and quasi-perfect absorption (>0.9) throughout low frequency range can be realized through a…