Optimal poroelastic layer sequencing for sound transmission loss maximization by topology optimization method.
Optimal poroelastic layer sequencing for sound transmission loss maximization by topology optimization method.
复制标题
通过拓扑优化方法实现声音传输损失最大化的最佳多孔弹性层排序。
DOI：
10.1121/1.2770541
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
Y. Kang
中科院分区：
文献类型：
--
作者：
J. Lee;Eun Il Kim;Y. Kim;Jung Soo Kim;Y. Kang
以最大化吸声材料的传声损失为目标，研究了多层吸声泡沫材料的最优铺层顺序。当允许有限量的多孔弹性材料时，可以优化由空气和多孔弹性层组成的泡沫。通过将传声损失最大化问题表示为一维拓扑优化问题，系统地找到了几个单一频率和频率范围内的最佳层排序和厚度。为了优化设计，采用由毕奥理论导出的传递矩阵计算了空气层和多孔弹性层的传输损耗。通过在几个多孔弹性材料参数之间插入五个内禀参数，得到了不同的空气-多孔弹性层分布;不需要滤波或后处理。所提出的方法优化的泡沫布局被证明是不同的，这取决于感兴趣的频带。
Optimal layer sequencing of a multilayered acoustical foam is solved to maximize its sound transmission loss. A foam consisting of air and poroelastic layers can be optimized when a limited amount of a poroelastic material is allowed. By formulating the sound transmission loss maximization problem as a one-dimensional topology optimization problem, optimal layer sequencing and thickness were systematically found for several single and ranges of frequencies. For optimization, the transmission losses of air and poroelastic layers were calculated by the transfer matrix derived from Biot's theory. By interpolating five intrinsic parameters among several poroelastic material parameters, distinct air-poroelastic layer distributions were obtained; no filtering or postprocessing was necessary. The optimized foam layouts by the proposed method were shown to differ depending on the frequency bands of interest.