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[1] Jiao Renqiang, Zhang Jianrun, Xue Fei, et al. Dynamic analysis and experimental study of vibro-acoustic systemwith uncertainties at middle frequencies [J]. Journal of Southeast University (English Edition), 2017, 33 (2): 166-170. [doi:10.3969/j.issn.1003-7985.2017.02.007]
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Dynamic analysis and experimental study of vibro-acoustic systemwith uncertainties at middle frequencies()
具有不确定性声振系统的中频动力学分析及实验研究
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
33
Issue:
2017 2
Page:
166-170
Research Field:
Computer Science and Engineering
Publishing date:
2017-06-30

Info

Title:
Dynamic analysis and experimental study of vibro-acoustic systemwith uncertainties at middle frequencies
具有不确定性声振系统的中频动力学分析及实验研究
Author(s):
Jiao Renqiang1;  2;  Zhang Jianrun1;  Xue Fei1
1School of Mechanical Engineering, Southeast University, Nanjing 211189, China
2School of Mechatronic Engineering, Hubei Polytechnic University, Huangshi 435003, China
焦仁强1;  2;  张建润1;  薛飞1
1东南大学机械工程学院, 南京 211189; 2湖北理工学院机电工程学院, 黄石 435003
Keywords:
hybrid finite element method and statistic energy analysis(FE-SEA)method;  dynamic analysis;  vibro-acoustic system;  uncertainties;  mid-frequency range
混合FE-SEA方法;  动力学分析;  声-振系统;  不确定性;  中频域
PACS:
TP391
DOI:
10.3969/j.issn.1003-7985.2017.02.007
Abstract:
To take into account the influence of uncetainties on the dynamic response of the vibro-acousitc structure, a hybrid modeling technique combining the finite element method(FE)and the statistic energy analysis(SEA)is proposed to analyze vibro-acoustics responses with uncertainties at middle frequencies. The mid-frequency dynamic response of the framework-plate structure with uncertainties is studied based on the hybrid FE-SEA method and the Monte Carlo(MC)simulation is performed so as to provide a benchmark comparison with the hybrid method. The energy response of the framework-plate structure matches well with the MC simulation results, which validates the effectiveness of the hybrid FE-SEA method considering both the complexity of the vibro-acoustic structure and the uncertainties in mid-frequency vibro-acousitc analysis. Based on the hybrid method, a vibro-acoustic model of a construction machinery cab with random properties is established, and the excitations of the model are measured by experiments. The responses of the sound pressure level of the cab and the vibration power spectrum density of the front windscreen are calculated and compared with those of the experiment. At middle frequencies, the results have a good consistency with the tests and the prediction error is less than 3.5 dB.
为考虑声-振结构中不确定性对系统动态响应的影响, 提出了一种基于有限元方法(FEM)和统计能力分析法(SEA)相结合的混合方法.基于该方法, 研究了具有不确定性的框架-板结构的中频动力学响应并以蒙特卡洛仿真结果为基准进行了对比分析.结果表明, 框架-板结构的能量响应与蒙特卡洛仿真结果具有较好的一致性, 验证了混合方法对具有不确定性复杂结构的中频声-振分析的有效性.基于混合FE-SEA方法, 建立了具有随机特性的某工程机械驾驶室声-振模型, 通过实验对模型的激励进行了测量.计算了驾驶室FE-SEA模型的声腔声压级响应与前风挡玻璃的振动功率谱密度响应, 并通过实验进行了对比分析.在中频域内, 二者有着较好的一致性, 预测误差小于3.5 dB.

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Memo

Memo:
Biographies: Jiao Renqiang(1984—), male, graduate; Zhang Jianrun(corresponding author), male, doctor, professor, zhangjr@seu.edu.cn.
Foundation items: Science and Technology Support Planning of Jiangsu Province(No.BE2014133), the Open Foundation of Key Laboratory of Underwater Acoustic Signal Processing(No.UASP1301), the Prospective Joint Research Project of Jiangsu province(No.BY2014127-01).
Citation: Jiao Renqiang, Zhang Jianrun, Xue Fei. Dynamic analysis and experimental study of vibro-acoustic system with uncertainties at middle frequencies[J].Journal of Southeast University(English Edition), 2017, 33(2):166-170.DOI:10.3969/j.issn.1003-7985.2017.02.007.
Last Update: 2017-06-20