均質化法による多孔質吸音材微視構造の寸法最適化

抄録

An optimization method to design micro structures of sound-absorbing poroelastic media is proposed in this study. First, Biot's parameters are identified for various micro structure of sound-absorbing material by using homogenization method and the linkage between Biot's parameters and the parameters of micro structures such as pore radius, fiber diameter and pore radius of cell membranes is derived. Then, the parameters of poroelastic materials are optimized by using transfer matrix method and genetic algorithm to maximized sound absorption coefficient at prescribed target frequency range. The optimal micro structures are verified by the homogenization method.