Development and practical application of locally resonant metamaterials for attenuation of noise and flexural vibration of floors in residential buildings

Choi, Jewoo; Cho, Tongjun; Bae, Sang Geun; Park, Hyo Seon

doi:10.1016/j.jobe.2022.104907

Cited by 11 publications

(16 citation statements)

References 40 publications

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“…Choi et al. (2022) reported that upper and lower peaks were not generated at an extremely small mass ratio of 0.0021. However, considering the mass ratio for effective suppression, PTLRMs are expected to generate such upper and lower peaks at all times.…”

Section: Resultsmentioning

confidence: 99%

“…The vibration attenuation effect of LRMs has been rarely reported for large-scale structures such as civil engineering structures, which is also the case for low-frequency ranges (below 70 Hz). Choi et al (2022) verified the reduction in acceleration and sound pressure levels in the vicinity of 40 Hz by installing a phononic crystal (PC)-type LRM in a floating floor system of residential buildings. However, practical reduction effects could not be confirmed owing to its extremely small mass ratio.…”

Section: Introductionmentioning

confidence: 83%

“…As outlined in Section 1, various types of LRMs have been studied, including PCs (Choi et al., 2022; Z. Liu et al., 2000; G. Wang et al., 2005; Zhao et al., 2015), beam‐type LRMs (Xiao et al., 2013), and LRMs embedded in host structures (J. S. Chen et al., 2011; Pai, 2010; H. Zhang et al., 2015). In this paper, we propose a PTLRM unit considering the ease of the band gap design, installation, and workability.…”

Section: Steel Beam With Ptlrm For Vibration Controlmentioning

confidence: 99%

“…As outlined in Section 1, various types of LRMs have been studied, including PCs (Choi et al, 2022;Z. Liu et al, 2000;G.…”

Section: Design Of Ptlrm Unitmentioning

confidence: 99%

“…Choi et al. (2022) verified the reduction in acceleration and sound pressure levels in the vicinity of 40 Hz by installing a phononic crystal (PC)‐type LRM in a floating floor system of residential buildings. However, practical reduction effects could not be confirmed owing to its extremely small mass ratio.…”

Section: Introductionmentioning

confidence: 99%

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Design and performance evaluation of steel beam members with plate‐type locally resonant metamaterials for vibration control

Choi

Cho

Park

2022

Computer aided Civil Eng

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In this study, a plate-type locally resonant metamaterial (PTLRM) is proposed to control bending vibrations and low-frequency noise of civil members. Considering the ease of design, installation, and workability, the PTLRM was fabricated using high-density and soft materials. The PTLRM design includes a resonance frequency calculation of the unit and band gap estimation of the PTLRMscoupled structure. Three indicators were developed and experimentally analyzed to evaluate the vibration attenuation performance of the PTLRM: the response suppression in the resonance of PTLRMs, peak response suppression ratio, and distance between peaks. Experimental results of a 5-m long steel beam with PTLRMs indicated that the bending modal responses of the steel beam were suppressed at frequencies closer to the local resonance of the PTLRM. This showed reasonable agreement with the results of the estimation. The acceleration of the PTLRMs-coupled beam was reduced by up to 98.58% in the frequency response function. The time history of acceleration also decreased significantly over the entire time period. The damping of the soft material had little effect on the bandwidth of the band gap. However, it was found that a proper increase in the damping of the soft material could increase the vibration suppression performance.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 83%