The possibility of harvesting electrical energy from industrial noise barriers using meta-wall bricks

Mir, Fariha; Saadatzi, Mohammad Sadegh; Ahmed, Riaz; Banerjee, Sourav

doi:10.1117/12.2296422

Cited by 9 publications

(3 citation statements)

References 16 publications

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“…Generally, a piezoelectric bimorph with the acoustic metamaterials is used for energy conversion. Based on this concept, several works have been reported [99][100][101][102]. Although the extracted electrical energy is on a minute scale, it may be improved further in the future with more innovative designs.…”

Section: Challenges and Future Outlookmentioning

confidence: 99%

The Present and Future Role of Acoustic Metamaterials for Architectural and Urban Noise Mitigations

Kumar

Lee

2019

Acoustics

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Owing to a steep rise in urban population, there has been a continuous growth in construction of buildings, public or private transport like cars, motorbikes, trains, and planes at a global level. Hence, urban noise has become a major issue affecting the health and quality of human life. In the current environmental scenario, architectural acoustics has been directed towards controlling and manipulating sound waves at a desired level. Structural engineers and designers are moving towards green technologies, which may help improve the overall comfort level of residents. A variety of conventional sound absorbing materials are being used to reduce noise, but attenuation of low-frequency noise still remains a challenge. Recently, acoustic metamaterials that enable low-frequency sound manipulation, mitigation, and control have been widely used for architectural acoustics and traffic noise mitigation. This review article provides an overview of the role of acoustic metamaterials for architectural acoustics and road noise mitigation applications. The current challenges and prominent future directions in the field are also highlighted.

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Section: Challenges and Future Outlookmentioning

confidence: 99%

The Present and Future Role of Acoustic Metamaterials for Architectural and Urban Noise Mitigations

Kumar

Lee

2019

Acoustics

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“…The maximum power could only be achieved near the resonance of the structure as a whole when the vibration intensity reaches the maximum. Based on the similar design presented in figure 7(a), Mir et al [116] and Saadatzi et al [117] explored the feasibility for simultaneous energy harvesting and noise insulation through finite element simulation. However, their finite element results could not strongly support their statements.…”

Section: Elastic Wave Energy Harvestingmentioning

confidence: 99%

Acoustic-Elastic Metamaterials and Phononic Crystals for Energy Harvesting: A Review

Tang

Liang

et al. 2021

Smart Mater. Struct.

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Metamaterials and phononic crystals (PCs) with artificially designed periodic microstructures have attracted increasing research interests due to their unique properties that cannot be easily realized in natural materials. In recent years, the applications of metamaterials and PCs have been extended into the field of energy harvesting. A direct integration design strategy can yield a multifunctional system to suppress undesired vibrations/noise and convert them into electrical energy for providing power supply to widely distributed micro-electromechanical systems. Moreover, the defect state mode of metamaterials/PCs can localize the energy with an amplification effect, which has a great potential for improving energy harvesting efficiency. In addition, through tailoring the refractive index profile of metamaterials/PCs, the wave focusing phenomenon can be realized to boost the energy harvesting efficiency over a wide frequency range. This paper presents a comprehensive overview of the state-of-the-art advances in this direction over the past decade. According to the design strategies and working mechanisms, the existing studies in the literature on this topic are outlined and classified into three different categories. The advantages and disadvantages of various configurations are compared. The potential solutions to the existing drawbacks are discussed. An outlook on future prospects in this area is provided.

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“…Protecting civil structures from EWs can be accomplished by converting surface waves into shear waves (Wei et al, 2015). Engineered metawall barriers use local resonance (LR) to transform surface waves into bulk waves that permeate far below the surface (Mir et al, 2018). Kim et al (Kim, 2012) shed light on a number of exciting design challenges, such as the effect of urban trees on the attenuation of EWs and their applications for SW hazard.…”

Section: Introductionmentioning

confidence: 99%

Efficient numerical simulations on the forest barrier for seismic wave attenuation: engineering safe constructions

Al-Shami,

Huang,

Amran

et al. 2024

Front. Built Environ.

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This paper aims to elucidate the clear visibility of attenuating seismic waves (SWs) with forest trees as natural metamaterials known as forest metamaterials (FMs) arranged in a periodic pattern around the protected area. In analyzing the changeability of the FM models, five distinct cases of “metawall” configurations were considered. Numerical simulations were conducted to study the characteristics of bandgaps (BGs) and vibration modes for each model. The finite element method (FEM) was used to illustrate the generation of BGs in low frequency ranges. The commercial finite element code COMSOL Multiphysics 5.4a was adopted to carry out the numerical analysis, utilizing the sound cone method and the strain energy method. Wide BGs were generated for the Bragg scattering BGs and local resonance BGs owing to the gradual variations in tree height and the addition of a vertical load in the form of mass to simulate the tree foliage. The results were promising and confirmed the applicability of FEM based on the parametric design language ANSYS 17.2 software to apply the boundary conditions of the proposed models at frequencies below 100 Hz. The effects of the mechanical properties of the six layers of soil and the geometric parameters of FMs were studied intensively. Unit cell layouts and an engineered configuration for arranging FMs based on periodic theory to achieve significant results in controlling ground vibrations, which are valuable for protecting a large number of structures or an entire city, are recommended. Prior to construction, protecting a region and exerting control over FM characteristics are advantageous. The results exhibited the effect of the ‘trees’ upper portion (e.g., leaves, crown, and lateral bulky branches) and the gradual change in tree height on the width and position of BGs, which refers to the attenuation mechanism. Low frequency ranges of less than 100 Hz were particularly well suited for attenuating SWs with FMs. However, an engineering method for a safe city construction should be proposed on the basis of the arrangement of urban trees to allow for the shielding of SWs in specific frequency ranges.

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The possibility of harvesting electrical energy from industrial noise barriers using meta-wall bricks

Cited by 9 publications

References 16 publications

The Present and Future Role of Acoustic Metamaterials for Architectural and Urban Noise Mitigations

The Present and Future Role of Acoustic Metamaterials for Architectural and Urban Noise Mitigations

Acoustic-Elastic Metamaterials and Phononic Crystals for Energy Harvesting: A Review

Efficient numerical simulations on the forest barrier for seismic wave attenuation: engineering safe constructions

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