Wave attenuation of super-material wave absorbing concrete panel subjected to two-dimensional plane wave

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (20) : 39-44.

GAO Yingjie1,FAN Hualin2,ZHANG Bei1,JIN Fengnian1

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Abstract

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.

Key words

super-material / wave absorbing / concrete / vibration wave

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GAO Yingjie1,FAN Hualin2,ZHANG Bei1,JIN Fengnian1. Wave attenuation of super-material wave absorbing concrete panel subjected to two-dimensional plane wave[J]. Journal of Vibration and Shock, 2018, 37(20): 39-44

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