ACOUSTIC ABSORPTION CHARACTERISTICS OF FOAMED ALUMINUM

doi:10.1088/1004-423X/7/2/006

中国物理B ›› 1998, Vol. 7 ›› Issue (2): 134-142.doi: 10.1088/1004-423X/7/2/006

ACOUSTIC ABSORPTION CHARACTERISTICS OF FOAMED ALUMINUM

郑大瑞¹, 蔡秀兰¹, 韩福生², 朱震刚², 刘长松²

(1)Institute of Acoustics, Academia Sinica, Beijing 100080, China; (2)State Key Laboratory of Internal Friction and Defects in Solids, Institute of Solid State Physics, Academia Sinica, Hefei 230031,China

收稿日期:1997-05-09 出版日期:1998-02-20 发布日期:1998-02-20

ACOUSTIC ABSORPTION CHARACTERISTICS OF FOAMED ALUMINUM

HAN FU-SHENG (韩福生)^a, ZHU ZHEN-GANG (朱震刚)^a, LIU CHANG-SONG (刘长松)^a, ZHENG DA-RUI (郑大瑞)^b, CAI XIU-LAN (蔡秀兰)^b

^a State Key Laboratory of Internal Friction and Defects in Solids, Institute of Solid State Physics, Academia Sinica, Hefei 230031, China; ^b Institute of Acoustics, Academia Sinica, Beijing 100080, China

Received:1997-05-09 Online:1998-02-20 Published:1998-02-20

摘要/Abstract

摘要： The acoustic absorption characteristics of foamed aluminum and the effect of its structural parameters on the characteristics have been in vestigated. The results indicate that the acoustic absorption behavior of foamed aluminum has an uncertain relation with its porosity, the effect of pore size is non-monotonous, while the flow resistance, which characterizes the structural coefficients, might be the most important factor. It is also found that the absorption peak is widened and the noise reduction coefficient can be increased through suitable compressive deformation.

Abstract: The acoustic absorption characteristics of foamed aluminum and the effect of its structural parameters on the characteristics have been in vestigated. The results indicate that the acoustic absorption behavior of foamed aluminum has an uncertain relation with its porosity, the effect of pore size is non-monotonous, while the flow resistance, which characterizes the structural coefficients, might be the most important factor. It is also found that the absorption peak is widened and the noise reduction coefficient can be increased through suitable compressive deformation.

中图分类号: (Powders, porous materials)

61.43.Gt

62.65.+k (Acoustical properties of solids) 62.20.F- (Deformation and plasticity)

韩福生, 朱震刚, 刘长松, 郑大瑞, 蔡秀兰. ACOUSTIC ABSORPTION CHARACTERISTICS OF FOAMED ALUMINUM[J]. 中国物理B, 1998, 7(2): 134-142.

HAN FU-SHENG (韩福生), ZHU ZHEN-GANG (朱震刚), LIU CHANG-SONG (刘长松), ZHENG DA-RUI (郑大瑞), CAI XIU-LAN (蔡秀兰). ACOUSTIC ABSORPTION CHARACTERISTICS OF FOAMED ALUMINUM[J]. Acta Physica Sinica (Overseas Edition), 1998, 7(2): 134-142.

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ACOUSTIC ABSORPTION CHARACTERISTICS OF FOAMED ALUMINUM

ACOUSTIC ABSORPTION CHARACTERISTICS OF FOAMED ALUMINUM

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