板结构声振响应随机能量流分析的试验验证

游进, 侯向阳

振动与冲击 ›› 2018, Vol. 37 ›› Issue (8) : 82-86.

PDF(1045 KB)
PDF(1045 KB)
振动与冲击 ›› 2018, Vol. 37 ›› Issue (8) : 82-86.
论文

板结构声振响应随机能量流分析的试验验证

  • 游进, 侯向阳
作者信息 +

Experimental validation of random energy flow analysis of  vibro acoustic response for plate structures#br#

  • YOU Jin, HOU XiangYang
Author information +
文章历史 +

摘要

之前关于随机能量流分析(REFA)的研究大多基于不同方法的模型仿真,本文则通过对单板和L型耦合板进行随机激励下的响应测试,对REFA的有效性进行研究。由于内损耗因子(ILF)是准确进行REFA数值分析的重要输入条件,本文亦提出了基于RFFA的ILF测试原理,并与经典SEA法的测试原理进行比较,基于单板试验获取了结构的ILF,并对两种方法的测试结果进行对比。L型耦合板试验则得到随机力的实测输入功率谱,将其与ILF测试值代入耦合板的REFA有限元数值模型,并考虑弯曲波与两种面内波的耦合,得到耦合板的响应预测值。L型耦合板弯曲响应的预测值与实测结果在整个试验频段上均较为吻合,表明REFA具有很好的预测精度。

Abstract

Previous researches concerning random energy flow analysis (REFA) were mainly based on model simulations. In this paper, tests were carried out respectively on a single plate and an Lshaped plate, based on which the validity of REFA was investigated. Because inner loss factor (ILF) is an important input condition for accurate REFA numerical simulation, the ILF testing method based on REFA was proposed and compared with that from the traditional SEA approach. Through the tests on the single plate, the ILF was obtained based on REFA and traditional SEA, and the results from the two methods were compared. For the tests on Lshaped coupled plates, the input power spectrum of the random force was measured as known input to the REFA numerical model of the test plates, and with the ILF test results, the responses of the plates were predicted considering the coupling between flexural and two inplane waves. A good agreement between predicted and measured response spectra for flexural wave field was observed, which verified that REFA is a reliable approach.

关键词

随机能量流分析 / 内损耗因子 / 能量密度 / 功率流 / 试验

Key words

Random energy flow analysis / Inner loss factor / Energy density / Power flow / Test

引用本文

导出引用
游进, 侯向阳. 板结构声振响应随机能量流分析的试验验证[J]. 振动与冲击, 2018, 37(8): 82-86
YOU Jin, HOU XiangYang. Experimental validation of random energy flow analysis of  vibro acoustic response for plate structures#br#[J]. Journal of Vibration and Shock, 2018, 37(8): 82-86

参考文献

[1] Kwon HW, Hong SY, Park DH,et, al.Vibrational energy flow models for out-of-plane waves in finite thin shell[J]. Journal of Mechanical Science and Technology, 2012, 26(3):689-701.
[2] Song JH,Hong SY, Development of non-conservativejoints in beam networks for vibration energyflow analysis[J]. Shock and Vibration, 2007, 14(1): 15-28.
[3] 孔祥杰,陈花玲, 祝丹晖, 等. 附加自由阻尼梁高频响应的能量有限元方法模型[J]. 振动与冲击, 2015, 34(17): 94-99.
Kong X J, Chen H L, Zhu D H, et, al.Energy finite element analysis for high-frequency vibration of beams with free-layer damping treatment[J]. Journal of Vibration and Shock, 2015, 34(17): 94-99.
[4] Xie M,Chen H,Wu JH. Transientenergydensitydistributionofarodunderhigh-frequencyexcitation, Journal ofSoundandVibration, 2011, 330 (12): 2701-2706.
[5] Zhu D H, Chen H L, Kong X J, et, al. A hybrid finite element-energy finite element method for mid-frequency vibrations of built-up structures under multi-distributed loadings[J]. Journal of Sound and Vibration, 2014, 333(22): 5723-5745.
[6] KongX J, ChenH L, Zhu D H, et, al. Study on the validity region of energy finite element analysis[J]. Journal of Sound and Vibration, 2014,333(9): 2601-2616.
[7] You J, Meng G, Li H G. Random energy flow analysis of coupled beam structures and its correlation with SEA[J]. Archive of Applied Mechanics, 2010, 81(1): 37-50.
[8] 游进, 李鸿光, 孟光. 耦合板结构随机能量有限元分析[J].振动与冲击,2009, 28(11): 43-46.
You J, Li H G, Meng G. Random energy finite element analysis of coupled plate structures[J]. Journal of Vibration and Shock, 2009, 28(11): 43-46.
[9] 游进,孟光,李鸿光. 声振系统中高频能量流分析法研究进展[J].振动与冲击, 2012, 31(11): 62-69.
You J, Meng G, Li H G.Review of mid-to-high frequency energy flow analysis method for vibro-acoustic systems[J]. Journal of Vibration and Shock, 2012, 31(11): 62-69.
[10] You J, Li H G, Meng G. Validity investigation of random energy flow analysis for beam structures[J]. Shock and Vibration, 2011, 18(1-2):269-280.
[11] 江民圣, 牛军川, 郑建华, 等. L型耦合板结构能量传递系数特性的研究[J].振动与冲击, 2015, 34(17): 131-136.
Jiang M S, Niu J C, Zheng J H, et, al. Energy transfer coefficients'features of L-shaped coupled plates[J]. Journal of Vibration and Shock, 2015, 34(17): 131-136.
[12] BernhardR. J., BouthierO. M.Simple models of the energetics of transversely vibrating plates[J]. Journal of Sound and Vibration, 1995, 182(1): 149-164.
 

PDF(1045 KB)

Accesses

Citation

Detail

段落导航
相关文章

/