东南大学学报（英文版）2017，Vol.33Issue(2)：166-170,5.DOI:10.3969/j.issn.1003-7985.2017.02.007
具有不确定性声振系统的中频动力学分析及实验研究
Dynamic analysis and experimental study of vibro-acoustic system with uncertainties at middle frequencies
摘要
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.关键词
混合FE-SEA方法/动力学分析/声-振系统/不确定性/中频域Key words
hybrid finite element method and statistic energy analysis(FE-SEA)method/dynamic analysis/vibro-acoustic system/uncertainties/mid-frequency range分类
信息技术与安全科学引用本文复制引用
焦仁强,张建润,薛飞..具有不确定性声振系统的中频动力学分析及实验研究[J].东南大学学报（英文版）,2017,33(2):166-170,5.基金项目
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). （No.BE2014133）
