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结构频带振动声辐射的有限元结合频率均方声压法数值计算

高宏林 黎胜

高宏林, 黎胜. 结构频带振动声辐射的有限元结合频率均方声压法数值计算[J]. 中国舰船研究, 2017, 12(4): 71-75, 82. doi: 10.3969/j.issn.1673-3185.2017.04.011
引用本文: 高宏林, 黎胜. 结构频带振动声辐射的有限元结合频率均方声压法数值计算[J]. 中国舰船研究, 2017, 12(4): 71-75, 82. doi: 10.3969/j.issn.1673-3185.2017.04.011
Honglin GAO, Sheng LI. Numerical calculation of acoustic radiation from band-vibrating structures via FEM/FAQP method[J]. Chinese Journal of Ship Research, 2017, 12(4): 71-75, 82. doi: 10.3969/j.issn.1673-3185.2017.04.011
Citation: Honglin GAO, Sheng LI. Numerical calculation of acoustic radiation from band-vibrating structures via FEM/FAQP method[J]. Chinese Journal of Ship Research, 2017, 12(4): 71-75, 82. doi: 10.3969/j.issn.1673-3185.2017.04.011

结构频带振动声辐射的有限元结合频率均方声压法数值计算

doi: 10.3969/j.issn.1673-3185.2017.04.011
详细信息
    作者简介:

    高宏林, 男, 1987年生, 博士生。研究方向:舰船振动噪声计算。E-mail:honglin_gao@mail.dlut.edu.cn

    通讯作者:

    黎胜(通信作者), 男, 1973年生, 博士, 教授。研究方向:舰船噪声分析与控制。E-mail:shengli@dlut.edu.cn

  • 中图分类号: U661.44

Numerical calculation of acoustic radiation from band-vibrating structures via FEM/FAQP method

  • 摘要:   目的  为了预报受频带激励的振动结构声辐射,  方法  利用有限元法(FEM)和频率均方声压法(FAQP),对受频带激励的结构振动声辐射问题进行数值计算研究。首先,通过有限元软件计算加筋圆柱壳在频带激励下表面质点速度的频率响应;然后,将结构表面质点速度转化为法向振动速度,再计算频带内的平均能量源(包括声强源、声压源和速度源);最后,通过FAQP法计算频带声压级,并与FEM和边界元法(BEM)计算的FAQP结果进行对比。  结果  结果表明,FEM和FAQP结合的方法可用于计算受频带激励结构的1/3倍频程的频带平均声辐射,且FEM和FAQP结合的方法具有较好的稳定性,计算频率更高,无需逐个频率计算再平均的过程。  结论   FEM和FAQP结合的方法可以作为一种适用于中、高频频带的内噪声预报方法。
  • 图  1  圆柱壳有限元模型

    Figure  1.  FEM model of cylindrical shell

    图  2  圆柱壳边界元模型及场点分布示意图

    Figure  2.  BEM model of cylindrical shell and locations of field points

    图  3  采用BEM和FAQP法计算的不同场点声压级误差比较

    Figure  3.  Comparison of calculated errors of sound pressure level for different field points by BEM and FAQP method

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出版历程
  • 收稿日期:  2017-03-30
  • 网络出版日期:  2017-07-27
  • 刊出日期:  2017-08-04

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