A Ternary Seismic Metamaterial for Low Frequency Vibration Attenuation
Structural vibration induced by low frequency elastic waves presents a great threat to infrastructure such as buildings, bridges, and nuclear structures. In order to reduce the damage of low frequency structural vibration, researchers proposed the structure of seismic metamaterial, which can be used...
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MDPI AG
2022-02-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/3/1246 |
| _version_ | 1797486466693070848 |
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| author | Chen Chen Jincheng Lei Zishun Liu |
| author_facet | Chen Chen Jincheng Lei Zishun Liu |
| author_sort | Chen Chen |
| collection | DOAJ |
| description | Structural vibration induced by low frequency elastic waves presents a great threat to infrastructure such as buildings, bridges, and nuclear structures. In order to reduce the damage of low frequency structural vibration, researchers proposed the structure of seismic metamaterial, which can be used to block the propagation of low frequency elastic wave by adjusting the frequency range of elastic wave propagation. In this study, based on the concept of phononic crystal, a ternary seismic metamaterial is proposed to attenuate low frequency vibration by generating band gaps. The proposed metamaterial structure is periodically arranged by cube units, which consist of rubber coating, steel scatter, and soft matrix (like soil). The finite element analysis shows that the proposed metamaterial structure has a low frequency band gap with 8.5 Hz bandwidth in the range of 0–20 Hz, which demonstrates that the metamaterial can block the elastic waves propagation in a fairly wide frequency range within 0–20 Hz. The frequency response analysis demonstrates that the proposed metamaterial can effectively attenuate the low frequency vibration. A simplified equivalent mass–spring model is further proposed to analyze the band gap range which agrees well with the finite element results. This model provides a more convenient method to calculate the band gap range. Combining the proposed equivalent mass–spring model with finite element analysis, the effect of material parameters and geometric parameters on the band gap characteristic is investigated. This study can provide new insights for low frequency vibration attenuation. |
| first_indexed | 2024-03-09T23:34:36Z |
| format | Article |
| id | doaj.art-f00fd2be4a0c45d6bb07789cac79efd4 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T23:34:36Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-f00fd2be4a0c45d6bb07789cac79efd42023-11-23T17:04:42ZengMDPI AGMaterials1996-19442022-02-01153124610.3390/ma15031246A Ternary Seismic Metamaterial for Low Frequency Vibration AttenuationChen Chen0Jincheng Lei1Zishun Liu2International Center for Applied Mechanics, State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaInternational Center for Applied Mechanics, State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaInternational Center for Applied Mechanics, State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaStructural vibration induced by low frequency elastic waves presents a great threat to infrastructure such as buildings, bridges, and nuclear structures. In order to reduce the damage of low frequency structural vibration, researchers proposed the structure of seismic metamaterial, which can be used to block the propagation of low frequency elastic wave by adjusting the frequency range of elastic wave propagation. In this study, based on the concept of phononic crystal, a ternary seismic metamaterial is proposed to attenuate low frequency vibration by generating band gaps. The proposed metamaterial structure is periodically arranged by cube units, which consist of rubber coating, steel scatter, and soft matrix (like soil). The finite element analysis shows that the proposed metamaterial structure has a low frequency band gap with 8.5 Hz bandwidth in the range of 0–20 Hz, which demonstrates that the metamaterial can block the elastic waves propagation in a fairly wide frequency range within 0–20 Hz. The frequency response analysis demonstrates that the proposed metamaterial can effectively attenuate the low frequency vibration. A simplified equivalent mass–spring model is further proposed to analyze the band gap range which agrees well with the finite element results. This model provides a more convenient method to calculate the band gap range. Combining the proposed equivalent mass–spring model with finite element analysis, the effect of material parameters and geometric parameters on the band gap characteristic is investigated. This study can provide new insights for low frequency vibration attenuation.https://www.mdpi.com/1996-1944/15/3/1246seismic metamaterialband gaplow-frequency vibration attenuationequivalent mass–spring model |
| spellingShingle | Chen Chen Jincheng Lei Zishun Liu A Ternary Seismic Metamaterial for Low Frequency Vibration Attenuation Materials seismic metamaterial band gap low-frequency vibration attenuation equivalent mass–spring model |
| title | A Ternary Seismic Metamaterial for Low Frequency Vibration Attenuation |
| title_full | A Ternary Seismic Metamaterial for Low Frequency Vibration Attenuation |
| title_fullStr | A Ternary Seismic Metamaterial for Low Frequency Vibration Attenuation |
| title_full_unstemmed | A Ternary Seismic Metamaterial for Low Frequency Vibration Attenuation |
| title_short | A Ternary Seismic Metamaterial for Low Frequency Vibration Attenuation |
| title_sort | ternary seismic metamaterial for low frequency vibration attenuation |
| topic | seismic metamaterial band gap low-frequency vibration attenuation equivalent mass–spring model |
| url | https://www.mdpi.com/1996-1944/15/3/1246 |
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