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Viscoelastic macromolecular materials are widely used in underwater acoustic fields because of their favorable acoustic performance. Dynamical mechanical properties of viscoelastic materials, such as Young's modulus, shear modulus, and relevant loss factors, are important in the forecast of acoustic properties, which connect acoustical design of underwater coating with materials prescription design. Dynamic Young's modulus of some macromolecular materials is measured with dynamic mechanical apparatus (DMA), and then the basic acoustic parameters are expanded from a narrow band to a broad band by using principles of time-temperature superposition (TTS). When applying the basic parameters to calculating characteristics of the uniform layer sample by using the finite element method, a reasonable agreement of sound absorption coefficients is obtained between the calculations and measurements in the acoustic pipe. Furthermore, the underwater acoustic absorption properties of the coating with a local resonant structure are discussed. Finally, some suggestions are given about how to improve the underwater absorption performance at low frequencies.
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Keywords:
- underwater acoustic absorption /
- local resonant structure /
- dynamical mechanical properties
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[3] [4] Ivansson S M 2012 J. Acoust. Soc. Am. 131 2622
[5] Baird A M, Kerr F H, Townend D J 1999 J. Acoust. Soc. Am. 105 1527
[6] [7] [8] Feng Y L, Liu X Z, Liu J H, Ma L 2009 Chin. Phys. B 18 3909
[9] Yu L G, Li Z H, Wang R Q, Ma L L 2013 Acta Phys. Sin. 62 064301 (in Chinese) [于利刚, 李朝晖, 王仁乾, 马黎黎 2013 62 064301]
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[12] [13] [14] Zhao H G, Liu Y Z, Wen J H, Yu D L, Wen X S 2007 Acta Phys. Sin. 56 4700 (in Chinese) [赵宏刚, 刘耀宗, 温激鸿, 郁殿龙, 温熙森 2007 56 4700]
[15] Zhao H G, Liu Y Z, Yu D L, Wang G, Wen J H, Wen X S 2007 J. Sound Vib. 303 185
[16] [17] [18] Wen J H, Zhao H G, Lv L M, Yuan B, Wang G, Wen X S 2011 J. Acoust. Soc. Am. 130 1201
[19] Lü L M, Wen J H, Zhao H G, Meng H, Wen X S 2012 Acta Phys. Sin. 61 214302 (in Chinese) [吕林梅, 温激鸿, 赵宏刚, 孟浩, 温熙森 2012 61 214302]
[20] [21] Jiang H, Wang Y R, Zhang M L, Hu Y P, Lan D, Zhang Y M, Wei B C 2009 Appl. Phys. Lett. 95 104101
[22] [23] Jiang H, Wang Y R, Zhang M L, Hu Y P, Lan D, Wu Q L, Lu H T 2010 Chin. Phys. B 19 026202
[24] [25] [26] Guo M L 2002 Dynamical Mechanical Analysis of Condensed Matter and Composite Material (Beijing: Chemical Industry Press) (in Chinese) [过梅丽2002高聚物与复合材料的动态力学热分析(北京: 化学工业出版社)
[27] Li R Z 1999 Materials Science and Engineering A 278 36
[28] [29] [30] Joseph P V, Mathew G, Joseph K 2003 Compos Part A-Applied Science and Manufacturing 34 275
[31] COMSOL Inc. 2013 COMSOL Multiphysics 43a
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[1] [2] Hinders M K, Rhodes B A, Fang T M 1995 J. Sound Vib. 185 219
[3] [4] Ivansson S M 2012 J. Acoust. Soc. Am. 131 2622
[5] Baird A M, Kerr F H, Townend D J 1999 J. Acoust. Soc. Am. 105 1527
[6] [7] [8] Feng Y L, Liu X Z, Liu J H, Ma L 2009 Chin. Phys. B 18 3909
[9] Yu L G, Li Z H, Wang R Q, Ma L L 2013 Acta Phys. Sin. 62 064301 (in Chinese) [于利刚, 李朝晖, 王仁乾, 马黎黎 2013 62 064301]
[10] [11] Liu Z Y, Zhang X, Mao Y W, Zhu Y Y, Yang Z, Chan C T, Sheng P 2000 Science 289 1734
[12] [13] [14] Zhao H G, Liu Y Z, Wen J H, Yu D L, Wen X S 2007 Acta Phys. Sin. 56 4700 (in Chinese) [赵宏刚, 刘耀宗, 温激鸿, 郁殿龙, 温熙森 2007 56 4700]
[15] Zhao H G, Liu Y Z, Yu D L, Wang G, Wen J H, Wen X S 2007 J. Sound Vib. 303 185
[16] [17] [18] Wen J H, Zhao H G, Lv L M, Yuan B, Wang G, Wen X S 2011 J. Acoust. Soc. Am. 130 1201
[19] Lü L M, Wen J H, Zhao H G, Meng H, Wen X S 2012 Acta Phys. Sin. 61 214302 (in Chinese) [吕林梅, 温激鸿, 赵宏刚, 孟浩, 温熙森 2012 61 214302]
[20] [21] Jiang H, Wang Y R, Zhang M L, Hu Y P, Lan D, Zhang Y M, Wei B C 2009 Appl. Phys. Lett. 95 104101
[22] [23] Jiang H, Wang Y R, Zhang M L, Hu Y P, Lan D, Wu Q L, Lu H T 2010 Chin. Phys. B 19 026202
[24] [25] [26] Guo M L 2002 Dynamical Mechanical Analysis of Condensed Matter and Composite Material (Beijing: Chemical Industry Press) (in Chinese) [过梅丽2002高聚物与复合材料的动态力学热分析(北京: 化学工业出版社)
[27] Li R Z 1999 Materials Science and Engineering A 278 36
[28] [29] [30] Joseph P V, Mathew G, Joseph K 2003 Compos Part A-Applied Science and Manufacturing 34 275
[31] COMSOL Inc. 2013 COMSOL Multiphysics 43a
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