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Multi-attenuation mechanism of hybrid cementitious metamaterial with local resonators and EPS foam particles
Journal of Building Engineering ( IF 6.7 ) Pub Date : 2025-01-21 , DOI: 10.1016/j.jobe.2025.111891
Jue Han, Dongyu Shi, Wenhao Wang, Hualin Fan

Hybrid metamaterial employing the local resonance and porous material will effectively promote vibration and wave attenuation. This study specifically investigated the vibration attenuation capabilities of metamaterial made of expanded polystyrene (EPS) foamed cementitious (EFC) material and local rubber-mass resonators. Four variations of EFC, differing in density, and three types of local resonators with distinct attenuation frequencies were designed. Frequency sweeping tests (FSTs) were conducted to explore the impacts of the EFC density, resonator type, and resonator combinations on the vibration attenuation effect. Compression tests were performed on MEFC blocks to examine resonators’ effects on the strength and failure characteristics. The results indicate that lower EFC density correlates with improved vibration attenuation. Furthermore, the integration of local resonators with EFC achieves targeted frequency vibration attenuation, with attenuation effectiveness positively correlated with resonator quantity. Increased density of EFC amplifies the resonators' impact on vibration attenuation. However, the arrangement of resonators along the vibration direction shows negligible impact on the vibration attenuation. Notably, resonators have little impact on the strength of the material. This study demonstrates that hybrid metamaterial with EPS foam particles and resonators effectively attenuates vibrations through multi-mechanisms.

中文翻译:


具有局部谐振器和 EPS 泡沫颗粒的混合胶凝超材料的多衰减机制



采用局部共振和多孔材料的混合超材料将有效促进振动和波衰减。本研究专门研究了由发泡聚苯乙烯 (EPS) 泡沫水泥基 (EFC) 材料和局部橡胶质量谐振器制成的超材料的减振能力。设计了四种密度不同的 EFC 变体和三种具有不同衰减频率的局部谐振器。进行了频率扫描测试 (FST),以探究 EFC 密度、谐振腔类型和谐振器组合对振动衰减效果的影响。对 MEFC 块进行了压缩测试,以检查谐振器对强度和失效特性的影响。结果表明,较低的 EFC 密度与改进的振动衰减相关。此外,本地谐振器与 EFC 的集成实现了目标频率的振动衰减,衰减效果与谐振器数量呈正相关。EFC 密度的增加放大了谐振器对振动衰减的影响。然而,谐振器沿振动方向的布置对振动衰减的影响可以忽略不计。值得注意的是,谐振器对材料的强度影响很小。这项研究表明,具有 EPS 泡沫颗粒和谐振器的混合超材料通过多种机制有效地衰减振动。
更新日期:2025-01-21
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