Vibro-acoustic analysis of auxetic hexagonal and anti-tetrachiral stepped cantilever beams

Krushynska, Anastasiia O.; Farhangdoust, Saman; Adediran, Ibrahim Adetola; Ranjbar, Mostafa

doi:10.1117/12.2583341

Cited by 3 publications

(1 citation statement)

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“…Metamaterials and meta-surfaces have been successfully applied in various industrial application [7][8][9][10]. Optical metamaterials have specifically been developed for many glazing purposes [11,12], The aim is to improve the performance of existing greenhouse glazing designs.…”

Section: Introductionmentioning

confidence: 99%

A Scalable optical meta-surface glazing design for agricultural greenhouses

Lakshminarayanan,

Ranjbar,

Ibrahim

et al. 2024

Phys. Scr.

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Optical meta-surfaces allow controllable reflection and transmission spectra in both optical and infrared regions. In this study, we explore their potential in enhancing the performance of low-emission glazing designed for improved energy efficiency, for agricultural greenhouses in cold climates. The low-emission glazing employs thin film optics to retain heat by allowing solar radiation while reflecting radiation emitted by room-temperature objects. The incorporation of metamaterials that can be scalably manufactured and designed for capturing solar energy in the mid-infrared spectrum, offers an opportunity to further enhance the glazing's energy efficiency. We use the finite difference time domain (FDTD) method and the transfer matrix method to propose a metamaterial structure, with spherical silver nanoparticles and thin-films, and compare the performance of this proposed design against existing materials. The outcome of this study offers insights into the potential of metamaterials in optimizing the energy efficiency of cold-climate agricultural greenhouses.

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Section: Introductionmentioning

confidence: 99%

A Scalable optical meta-surface glazing design for agricultural greenhouses

Lakshminarayanan,

Ranjbar,

Ibrahim

et al. 2024

Phys. Scr.

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Hybrid Design Optimization of Sandwich Panels with Gradient Shape Anti-Tetrachiral Auxetic Core for Vibroacoustic Applications

Mazloomi

Ranjbar

2021

Transp Porous Med

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Full-Gradient Optimization of the Vibroacoustic Performance of (Non-)auxetic Sandwich Panels

et al. 2021

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This paper aims to optimize vibro-acoustic response of (non-) auxetic sandwich panels by use of topology optimization method. First, structural noise and vibration responses of the auxetic panel with the re-entrant hexagonal honeycomb core are studied. It is proved that the interactions between the structural vibrations and induced noise are more complex when expected for a low-frequency range, and the optimized noise reduction can be obtained by a proper combination of auxetic and non-auxetic properties within a single structure. Therefore, vibro-acoustic response of the sandwich panel with a re-entrant hexagonal honeycomb core by applying a full-gradient two-dimensional geometry optimization method is analyzed and optimized. It is shown that under various random loads, the sound power level can be reduced by about 20% at the cost of a slight increase (< 5%) of the total mass. Besides, the structural Eigen frequencies are shifted to lower values that are desirable for applications, e.g., in the aerospace industry. The obtained results ensure that the proposed optimization approach delivers extra noise reduction for auxetic sandwich panels as compared to the results available in the literature.

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Vibro-acoustic analysis of auxetic hexagonal and anti-tetrachiral stepped cantilever beams

Cited by 3 publications

References 0 publications

A Scalable optical meta-surface glazing design for agricultural greenhouses

A Scalable optical meta-surface glazing design for agricultural greenhouses

Hybrid Design Optimization of Sandwich Panels with Gradient Shape Anti-Tetrachiral Auxetic Core for Vibroacoustic Applications

Full-Gradient Optimization of the Vibroacoustic Performance of (Non-)auxetic Sandwich Panels

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