具有不确定性声振系统的中频动力学分析及实验研究（英文）

发布时间：2018-02-26 23:12

本文关键词： 混合FE-SEA方法动力学分析声-振系统不确定性中频域　出处：《Journal of Southeast University(English Edition)》2017年02期 　论文类型：期刊论文

【摘要】：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3.5dB.
[Abstract]:In order to consider the influence of uncertainty in acousto-vibration structure on the dynamic response of the system, a hybrid method based on finite element method (FEM) and statistical capability analysis method (SEAA) is proposed. The if dynamic response of frame plate structure with uncertainty is studied and compared with Monte Carlo simulation results. The results show that, The energy response of frame-plate structure is in good agreement with the Monte Carlo simulation results, which verifies the validity of the hybrid method for intermediate frequency acoustic vibration analysis of complex structures with uncertainties. The acoustic vibration model of the cab of a certain construction machinery with random characteristics is established. The excitation of the model is measured by experiments. The acoustic pressure level response of the cab FE-SEA model and the vibration power spectral density response of the front windscreen glass are calculated. The experimental results show that there is a good consistency between them in the intermediate frequency domain, and the prediction error is less than 3.5 dB.
【作者单位】：东南大学机械工程学院;湖北理工学院机电工程学院;
【基金】：Science and Technology Support Planning of Jiangsu Province(No.BE2014133) the Open Foundation of Key Laboratory of Underw ater Acoustic Signal Processing(No.UASP1301) the Prospective Joint Research Project of Jiangsu province(No.BY2014127-01)
【分类号】：O421

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