中国物理B ›› 2010, Vol. 19 ›› Issue (2): 26202-026202.doi: 10.1088/1674-1056/19/2/026202
吴群力1, 逯还通1, 王育人2, 胡燕萍2, 蓝鼎2, 张密林3, 姜恒4
Jiang Heng(姜恒)a)b), Wang Yu-Ren(王育人) b)†, Zhang Mi-Lin(张密林)a), Hu Yan-Ping(胡燕萍)b), Lan Ding(蓝鼎)b), Wu Qun-Li(吴群力)c), and Lu Huan-Tong(逯还通) c)
摘要: The interpenetrating network structure provides an interesting avenue to novel materials. Locally resonant phononic crystal (LRPC) exhibits excellent sound attenuation performance based on the periodical arrangement of sound wave scatters. Combining the LRPC concept and interpenetrating network glassy structure, this paper has developed a new material which can achieve a wide band underwater strong acoustic absorption. Underwater absorption coefficients of different samples were measured by the pulse tube. Measurement results show that the new material possesses excellent underwater acoustic effects in a wide frequency range.Moreover, in order to investigate impacts of locally resonant units,some defects are introduced into the sample. The experimental result and the theoretical calculation both show that locally resonant units being connected to a network structure play an important role in achieving a wide band strong acoustic absorption.
中图分类号: (Photonic bandgap materials)