二维周期阻尼薄板结构的隔声特性
发布时间：2019-06-02 16:53
【摘要】：薄板结构中,传统大块敷设阻尼虽然能提高隔声量,但不利于轻量化设计,因此提出二维周期阻尼敷设方式,借助有限元法及VA one声学仿真软件,分析二维周期块状阻尼分布、形状等参数对薄板隔声特性的影响。结果表明,随着阻尼数目的增加,在16~125Hz和250~1 000 Hz频段内,6块阻尼敷设方式隔声量最小;全频段范围内,x、y方向晶格常数均为100mm时,隔声量最小。因此,在特定频段内,合理调整周期阻尼结构的晶格常数及阻尼数目能使隔声量达到最大;二维周期阻尼形状对隔声量有较大的影响,对于圆、正三角形及矩形三种特定的阻尼形状而言,圆形阻尼形状隔声效果最优。
[Abstract]:In thin plate structure, although the traditional large block laying damping can improve the sound insulation, but it is not conducive to lightweight design, so the two-dimensional periodic damping laying mode is put forward, and the two-dimensional periodic block damping distribution is analyzed with the help of finite element method and VA one acoustic simulation software. The influence of shape and other parameters on the sound insulation characteristics of thin plates. The results show that with the increase of damping number, the sound insulation of six damping laying modes is the smallest in the frequency range of 16~125Hz and 250 鈮，
本文编号：2491279
[Abstract]:In thin plate structure, although the traditional large block laying damping can improve the sound insulation, but it is not conducive to lightweight design, so the two-dimensional periodic damping laying mode is put forward, and the two-dimensional periodic block damping distribution is analyzed with the help of finite element method and VA one acoustic simulation software. The influence of shape and other parameters on the sound insulation characteristics of thin plates. The results show that with the increase of damping number, the sound insulation of six damping laying modes is the smallest in the frequency range of 16~125Hz and 250 鈮，
本文编号：2491279
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