多重谐振水泥基声子晶体带隙特性研究

doi:10.11896/cldb.22080126

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Abstract In order to broaden the elastic wave attenuation band of metaconcrete, a multiple resonant cement-based phononic crystal was proposed based on the local resonance theory. Using the finite element method, the energy band structure, eigenmodes and attenuation characteristics of the multiple resonant cement-based phononic crystal were calculated, the generation mechanism and the influence law of its band gap was studied, the band gap estimation formula was derived from the mass-spring system, and the vibration reduction performance of the metaconcrete filling layer structure was analyzed. The results showed that the multiple resonant cement-based phononic crystal had two band gaps in the 400 Hz, where the starting and cut-off frequencies of the band gaps were determined by the vibration modes of resonator I, resonator II, and cement mortar matrix. The elastic modulus, Poisson's ratio and thickness of the soft coating were the main factors affecting the band gap. The acceleration level of the metaconcrete filling layer structure composed of multiple resonant cement-based phononic crystals in the frequency band of 1—400 Hz was smaller than that of the ordinary self-compacting concrete filling layer structure, especially in the band gap frequency band, the vibration was reduced by 6—9 dB.

Key words： metaconcrete local resonance multiple resonant phononic crystal band gap vibration reduction performance

Published: 25 June 2024 Online: 2024-07-17

CLC number:

TU528.41

Fund:National Natural Science Foundation of China (52078490,11790283).

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	Articles by authors
	CHEN Junhao
	ZENG Xiaohui
	XIE Youjun
	LONG Guangcheng
	TANG Zhuo

Cite this article:

CHEN Junhao,ZENG Xiaohui,XIE Youjun, et al. Research on Band Gaps Characteristics of Multiple Resonant Cement-based Phononic Crystals[J]. Materials Reports, 2024, 38(12): 22080126-9.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.22080126 OR http://www.mater-rep.com/EN/Y2024/V38/I12/22080126

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