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桦木单板/玻璃纤维复合材料声学振动性能的研究

林斌 苗媛媛 李瑞 金祥龙 李慕之 刘镇波

林斌, 苗媛媛, 李瑞, 金祥龙, 李慕之, 刘镇波. 桦木单板/玻璃纤维复合材料声学振动性能的研究[J]. 北京林业大学学报, 2019, 41(1): 126-133. doi: 10.13332/j.1000-1522.20180317
引用本文: 林斌, 苗媛媛, 李瑞, 金祥龙, 李慕之, 刘镇波. 桦木单板/玻璃纤维复合材料声学振动性能的研究[J]. 北京林业大学学报, 2019, 41(1): 126-133. doi: 10.13332/j.1000-1522.20180317
Lin Bin, Miao Yuanyuan, Li Rui, Jin Xianglong, Li Muzhi, Liu Zhenbo. Acoustic vibration properties of birch veneer/glass fiber composites[J]. Journal of Beijing Forestry University, 2019, 41(1): 126-133. doi: 10.13332/j.1000-1522.20180317
Citation: Lin Bin, Miao Yuanyuan, Li Rui, Jin Xianglong, Li Muzhi, Liu Zhenbo. Acoustic vibration properties of birch veneer/glass fiber composites[J]. Journal of Beijing Forestry University, 2019, 41(1): 126-133. doi: 10.13332/j.1000-1522.20180317

桦木单板/玻璃纤维复合材料声学振动性能的研究

doi: 10.13332/j.1000-1522.20180317
基金项目: 

国家自然科学基金项目 31670559

中央高校基本科研业务费专项 2572016EBJ1

详细信息
    作者简介:

    林斌。主要研究方向:木材声学。Email:LBQ877652256@163.com   地址:150040黑龙江省哈尔滨市和兴路26号东北林业大学材料科学与工程学院

    责任作者:

    刘镇波,教授。主要研究方向:木材声学、木材功能性改良。Email:liu.zhenbo@foxmail.com  地址:同上

  • 中图分类号: S781.38

Acoustic vibration properties of birch veneer/glass fiber composites

  • 摘要: 目的面对我国乐器音板用材资源的严重不足,寻找新材料替代传统乐器木质音板用材是非常有必要的。方法本试验以玻璃纤维为增强材料,桦木单板为基体,按照单板层积材结构设计制备桦木单板/玻璃纤维复合材料。通过对玻璃纤维复合材料声学振动性能检测分析,探究玻璃纤维布的不同铺放位置和铺放层数对复合材料声学振动性能的影响。结果用1层玻璃纤维布铺放在表层单板下的复合材料A的比动弹性模量和E/G值分别为22.20GPa和16.55,比用1层玻璃纤维布铺放在芯层单板单侧的复合材料B分别高了8.7%、17.8%。用2层玻璃纤维布分别铺放在上下表层单板内的复合材料C的比动弹性模量和E/G值分别为25.04GPa和17.04,比用玻璃纤维布铺放在芯层单板两侧的复合材料D高了7.5%和18.0%。纤维铺放位置对声辐射品质常数和声阻抗的影响较小。玻璃纤维布的层数与复合材料的声学振动性能不成线性关系,铺放2层玻璃纤维布的复合材料具有较高的比动弹性模量和E/G值。玻璃纤维布铺放3层和4层的复合材料的比动弹性模量和E/G比铺放2层的都小。随着玻璃纤维布层数的增加,声辐射品质常数呈减小的趋势。通过综合评分法分析发现:玻璃纤维布铺放在表层单板下的复合材料综合评分值都高于铺放在靠近芯层单板的复合材料,铺放2层玻璃纤维布的复合材料的综合评分值达到最大。结论玻璃纤维布铺放在表层单板下的复合材料声学振动性能优于纤维布铺放在靠近芯层单板的复合材料。铺放2层玻璃纤维布的复合材料C的声学振动性能达到最好。尽管复合材料C的E/G值约为西加云杉的80%,但比动弹性模量和西加云杉的相接近,说明桦木单板/玻璃纤维复合材料具有替代传统木质音板用材的可能性。

     

  • 图  1  玻璃纤维布不同铺放位置

    Figure  1.  Different placements of glass fiber cloth

    图  2  不同层数玻璃纤维布

    Figure  2.  Different layers of glass fiber cloth

    图  3  玻璃纤维布不同铺放位置的复合材料综合评分值

    Figure  3.  Comprehensive scores for composits of different placement positions of glass fiber cloth

    图  4  不同层数玻璃纤维布复合材料的综合评分值

    Figure  4.  Comprehensive score for composites of different number of glass fiber cloth

    图  5  整体综合评分值

    Figure  5.  Overall comprehensive score values

    表  1  玻璃纤维布不同铺放位置制备的复合材料和西加云杉各项声学指标平均值

    Table  1.   Average values of acoustic parameters of spruce and composites prepared by different placements of glass fiber cloth

    编号
    No.
    样本数
    Sample number
    密度
    Density/(g·cm-3)
    比动弹性模量
    Specific dynamic elastic modulus/GPa
    E/G
    E/G value
    声辐射品质常数
    Acoustic radiation damping/(m·Pa-1·s-3)
    声阻抗
    Acoustic impedance/(Pa·s·m-1)
    A 20 0.78 22.20 16.55 6.03 3.68
    (0.01) (0.31) (0.32) (0.02) (0.02)
    B 20 0.79 20.42 14.05 5.75 3.55
    (0.01) (0.35) (0.32) (0.02) (0.02)
    C 20 0.85 25.04 17.40 5.87 4.27
    (0.01) (0.39) (0.19) (0.05) (0.01)
    D 20 0.85 23.29 14.75 5.70 4.08
    (0.01) (0.35) (0.21) (0.03) (0.01)
    西加云杉 20 0.43 25.32 21.14 11.37 2.39
    Sitka spruce (0.01) (0.21) (0.15) (0.01) (0.01)
    注:括号内为标准偏差值。Note: data in bracket is standard deviation.
    下载: 导出CSV

    表  2  不同层数玻璃纤维布复合材料的声学指标平均值

    Table  2.   Average acoustic index of glass fiber cloth composites with different layers

    编号
    No.
    样本数
    Sample number
    密度
    Density/(g·cm-3)
    比动弹性模量
    Specific dynamic elastic modulus/GPa
    E/G
    E/G value
    声辐射品质常数
    Acoustic radiation damping/(m·Pa-1·s-3)
    声阻抗
    Acoustic impedance/(Pa·s·m-1)
    E 20 0.74 17.05 14.49 5.62 3.03
    (0.01) (0.28) (0.29) (0.06) (0.01)
    A 20 0.78 22.20 16.55 6.03 3.68
    (0.01) (0.31) (0.32) (0.02) (0.02)
    C 20 0.85 25.04 17.40 5.87 4.27
    (0.01) (0.39) (0.19) (0.05) (0.01)
    H 20 0.93 22.24 15.87 5.09 4.37
    (0.01) (0.36) (0.43) (0.03) (0.01)
    J 20 1.00 21.96 16.40 4.71 4.66
    (0.01) (0.41) (0.21) (0.01) (0.05)
    注:括号内为标准偏差值。Note: data in bracket is the standard deviation.
    下载: 导出CSV

    表  3  5项性能参数指标的权重

    Table  3.   Weight factors of five performance indicators

    参数
    Indicator
    比动弹性模量
    Specific dynamic modulus of elasticity
    声辐射阻尼常数
    Acoustic radiation damping constant
    E/G
    E/G value
    声阻抗
    Acoustic impedance
    密度
    Density
    权重因子Weight factor 0.40 0.20 0.20 0.07 0.13
    下载: 导出CSV
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  • 收稿日期:  2018-10-10
  • 修回日期:  2018-11-06
  • 刊出日期:  2019-01-01

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