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基于传递函数法的水下消声层声学性能研究

叶昌铮 孟晗 辛锋先 卢天健

叶昌铮, 孟晗, 辛锋先, 卢天健. 基于传递函数法的水下消声层声学性能研究[J]. 力学学报, 2016, 48(1): 213-224. doi: 10.6052/0459-1879-15-087
引用本文: 叶昌铮, 孟晗, 辛锋先, 卢天健. 基于传递函数法的水下消声层声学性能研究[J]. 力学学报, 2016, 48(1): 213-224. doi: 10.6052/0459-1879-15-087
Ye Changzheng, Meng Han, Xin Fengxian, Lu Tianjian. TRANSFER FUNCTION METHOD FOR ACOUSTIC PROPERTY STUDY OF UNDERWATER ANECHOIC LAYER[J]. Chinese Journal of Theoretical and Applied Mechanics, 2016, 48(1): 213-224. doi: 10.6052/0459-1879-15-087
Citation: Ye Changzheng, Meng Han, Xin Fengxian, Lu Tianjian. TRANSFER FUNCTION METHOD FOR ACOUSTIC PROPERTY STUDY OF UNDERWATER ANECHOIC LAYER[J]. Chinese Journal of Theoretical and Applied Mechanics, 2016, 48(1): 213-224. doi: 10.6052/0459-1879-15-087

基于传递函数法的水下消声层声学性能研究

doi: 10.6052/0459-1879-15-087
基金项目: 国家基础研究计划(2011CB610300),国家自然科学基金(51528501,11321062),中央高校基本科研专项基金(2014qngz12)和国家留学基金资助项目.
详细信息
    通讯作者:

    辛锋先,副教授,主要研究方向:轻质材料结构流固耦合动力学、声振耦合理论与实验.E-mail:fengxian.xin@gmail.com,fxxin@mail.xjtu.edu.cn

  • 中图分类号: O326

TRANSFER FUNCTION METHOD FOR ACOUSTIC PROPERTY STUDY OF UNDERWATER ANECHOIC LAYER

  • 摘要: 潜艇在水下潜航时,为防止敌方声呐的探测,需要采用各种主被动手段来降低自身的噪声,其中主要手段就是在潜艇外壳覆盖黏弹性消声瓦结构. 针对潜艇消声瓦结构降噪问题,考虑结构两侧的流体负载,建立了潜艇壁面水下消声覆盖层的消声理论模型. 将潜艇壁面结构简化为无曲率的无限大薄板,基于基尔霍夫(Kirchho )薄板理论和声波方程,应用传递函数法导出了消声覆盖层的声压插入损失. 利用所建理论模型进行了数值计算,讨论了不同的内侧流体介质、艇壳厚度、消声层厚度和孔腔形状对壁面结构振动与声学性能的影响. 研究发现,内侧介质为空气时,在低频段,消声层对结构振动的削弱量小于消声层加入后艇壳振动的增强量,故消声层的加入反而使壁面结构的振动增大;在高频段,覆盖消声层后壁面结构的振动明显减小. 内侧介质为水时,覆盖消声层后,壁面结构的振动在全频段均减小,且减小量随频率的增加而增加. 增大艇壳厚度及消声层厚度有利于潜艇壁面结构的减振降噪. 当消声层孔腔内径沿潜艇内侧至外侧的方向先减小再增大时,消声层在高频段减振降噪效果较佳;当孔腔内径沿潜艇内侧至外侧的方向先增大再减小时,消声层在中频段的减振降噪效果更好.

     

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出版历程
  • 收稿日期:  2015-03-18
  • 修回日期:  2015-08-21
  • 刊出日期:  2016-01-18

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