中国物理B ›› 2010, Vol. 19 ›› Issue (2): 26202-026202.doi: 10.1088/1674-1056/19/2/026202

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Wide-band underwater acoustic absorption based on locally resonant unit and interpenetrating network structure

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   

  1. (1)BSWA Technology Co., Ltd., Beijing 100029, China; (2)Key Laboratory of Microgravity Science, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China; (3)Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China; (4)Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China;Key Laboratory of Microgravity Science, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2009-05-30 修回日期:2009-07-16 出版日期:2010-02-15 发布日期:2010-02-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No.~10832011) and the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No.~KJCX2-YW-L08).

Wide-band underwater acoustic absorption based on locally resonant unit and interpenetrating network structure

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)   

  1. a Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China; b Key Laboratory of Microgravity Science, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China; c BSWA Technology Co., Ltd., Beijing 100029, China
  • Received:2009-05-30 Revised:2009-07-16 Online:2010-02-15 Published:2010-02-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 10832011) and the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No. KJCX2-YW-L08).

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.

Abstract: 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.

Key words: underwater acoustic absorption, wide frequency, locally resonant unit, interpenetrating networks

中图分类号:  (Photonic bandgap materials)

  • 42.70.Qs
62.65.+k (Acoustical properties of solids) 43.30.Es (Velocity, attenuation, refraction, and diffraction in water, Doppler effect)