1. State Key Laboratory for Disaster Prevention & Mitigation of Explosion & Impact, PLA University of Science & Technology, Nanjing 210007, China
2. Research center of Lightweight Structures and Intelligent Manufacturing, State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Local resonant acoustic material can filter some specific frequencies of sound waves.Based on the wave absorption theory, the article combines local resonant structure with the concrete material, a super-material wave absorption concrete (SMWAC) slab was designed.Its wave absorbing effect was then analyzed.Through numerical simulation using LS-dyna software, the wave absorbing effect was contrasted between a common concrete slab and the SMWAC slab.It was analyzed that how the coating material, aggregation size and the aggregation arrangement influence wave absorbing effect.The simulation result reveals that the SMWAC slab has strongly obvious wave absorbing effect contrasted with common concrete.The SMWAC slab has optional wave absorbing capability due to the difference of coating material.A bigger size of aggregation in the SMWAC slab makes the wave absorbing effect more obvious in the case that each component has the same ratio.The wave absorbing effect is almost the same between a rectangular SMWAC slab and an interlaced SMWAC slab.
[1]S. John. Strong localization of photons in certain disordered dielectric superlattices. Physical Review Letters, 58(23):2486–2489, 1987.
[2]M. M. Sigalas and E. N. Economou. Elastic and acoustic wave band structure. Journal of Sound and Vibration, 158(2):377–382, 1992.
[3]R. Mártinez-Sala, J. Sancho, J. V. Sánchez, V. Gómez, J. Llinares, and F. Meseguer. Sound attenuation by sculpture. Nature, 378:241, 1995.
[4]J. V. Sánchez-Pérez, D. Caballero, R. Mártinez-Sala, C. Rubio, J. Sánchez-Dehesa, F. Meseguer, J. Llinares, and F. Gálvez. Sound attenuation by a two-dimensional array of rigid cylinders. Physical Review Letters, 80(24):5325–5328, 1998.
[5]Z. Liu, X. Zhang, Y. Mao, Y. Y. Zhu, Z. Yang, C. T. Chan, and P. Sheng. Locally resonant sonic materials. Science, 289(5485):1734–1736, 2000b.
[6]Z. Liu, C. T. Chan, and P. Sheng. Three-component elastic wave band-gap material. Physical Review B, 65 (16):165116, 2002.
[7]Z. Liu, C. T. Chan, and P. Sheng. Analytic model of phononic crystals with local resonances. Physical Review B, 71(1):014103, 2005.
[8]刘娇. 局域共振型声学超材料机理探讨[D]. 华南理工大学, 2015.
J. Liu, Z.-L. Hou X.-J. Fu Wuli Xuebao Mechanism for local resonant acoustic metamaterial [J].Acta Physica Sinica.2015.(15).
[9]孙宏伟, 林国昌, 杜星文,等. 一种新型声学超材料平板对机械波吸收性能的模拟与实验研究[J]. 物理学报, 2012, 61(15):154302-154302.
Sun Hongwei, Lin Guochang, Du Xingwen. Simulation and experimental study of a metamaterial panel for mechanical wave absorption [J].Acta Physica Sinica;2012, 61(15)
[10]林国昌, 孙宏伟, 谭惠丰,等. 一种超材料梁对机械波振动吸收的模拟研究[J]. 物理学报, 2011, 60(3):354-360.
Lin Guochagn, Sun Hongwei, Tan Huifeng. Simulation of a metamaterial beam for mechanical wave absorption [J].Acta Physica Sinica; 2011, 60(3)
[11]S. Brûlé, E. H. Javelaud, S. Enoch, and S. Guenneau. Experiments on seismic metamaterials: Molding surface waves. Physical Review Letters, 112(13):133901, 2014.
[12] Mitchell S J, Pandolfi A, Ortiz M. Metaconcrete: designed aggregates to enhance dynamic performance[J]. Journal of the Mechanics & Physics of Solids, 2013, Submitted(1):69-81.