HAN Feng, SHEN Chen, XU Junwei. Identification of Dynamic Forces on Aircraft Engine Mounts With the Least Squares Method[J]. Applied Mathematics and Mechanics, 2020, 41(9): 974-984. doi: 10.21656/1000-0887.410054
Citation: HAN Feng, SHEN Chen, XU Junwei. Identification of Dynamic Forces on Aircraft Engine Mounts With the Least Squares Method[J]. Applied Mathematics and Mechanics, 2020, 41(9): 974-984. doi: 10.21656/1000-0887.410054

Identification of Dynamic Forces on Aircraft Engine Mounts With the Least Squares Method

doi: 10.21656/1000-0887.410054
  • Received Date: 2020-02-19
  • Rev Recd Date: 2020-07-02
  • Publish Date: 2020-09-01
  • For aircraft noise and vibration control, it is vitally important to identify dynamic forces on engine mounts caused by engine operation. Although such dynamic forces are needed to predict and control structural vibration and structure-borne noise in the cabin, they cannot be measured directly in the flight state. The least squares method was employed to identify the dynamic forces based on the frequency response function (FRF) between excitation points and response positions with the actual acceleration measurements in the flight state. A norm condition number criterion was used to evaluate the accuracy of the inverse calculation process, and relative errors of the predicted dynamic forces were calculated. The results show that, the identified forces meet engineering requirements.
  • loading
  • [1]
    杜建镔. 结构优化及其在振动和声学设计中的应用[M]. 北京: 清华大学出版社, 2015.(DU Jianbin. Structural Optimization and Its Application in Vibration and Acoustic Design [M]. Beijing: Tsinghua University Press, 2015.(in Chinese))
    [2]
    张磊, 曹跃云, 杨自春, 等. 总体最小二乘正则化算法的载荷识别[J]. 振动与冲击, 2014,33(9): 159-164.(ZHANG Lei, CAO Yueyun, YANG Zichun, et al. Load identification using CG-TLS regularization algorithm[J]. Journal of Vibration and Shock,2014,33(9): 159-164.(in Chinese))
    [3]
    姚学锋, 杨桂, 姚振汉, 等. 先进复合材料自行车架的动力学特性分析[C]//第六届全国结构工程学术会议论文集. 北京, 1997.(YAO Xuefeng, YANG Gui, YAO Zhenhan, et al. Dynamic characteristics of advanced composite bicycle frame[C]//The 6th National Academic Conference on Structural Engineering.Beijing, 1997.(in Chinese))
    [4]
    陆秋海, 李连友, 向律楷, 等. 非平稳环境激励下结构工作模态参数识别法[J]. 清华大学学报(自然科学版), 2013,53(3): 389-393.(LU Qiuhai, LI Lianyou, XIANG Lükai, et al. Operational modal parameter identification of structures for non-stationary ambient excitation[J]. Journal of Tsinghua University (Science and Technology),2013,53(3): 389-393.(in Chinese))
    [5]
    XU X, OU J P. Force identification of dynamic systems using virtual work principle[J]. Journal of Sound and Vibration,2014,337: 71-94.
    [6]
    BARTLETT F D, FLANNELLY W G. Model verification of force determination for measuring vibratory loads[J]. Journal of the American Helicopter Society,1979,24(2): 10-18.
    [7]
    OKUBO N S, TATSUNO T. Identification of forces generated by a machine under operating condition[C]// Proceedings of International Modal Analysis Conference.Chicago, 1985.
    [8]
    LIU Y, JR SHEPARD S W. Dynamic force identification based on enhanced least squares and total least-squares schemes in the frequency domain[J]. Journal of Sound and Vibration,2005,282(1/2): 37-60.
    [9]
    缑百勇, 陆秋海, 王波, 等. 利用固有频率异常值分析法检测螺栓拧紧力[J]. 振动与冲击, 2015,34(23): 77-82.(GOU Baiyong, LU Qiuhai, WANG Bo, et al. Bolt tightening force detection using outlier analysis of structural natural frequencies[J]. Journal of Vibration and Shock,2015,34(23): 77-82.(in Chinese))
    [10]
    白会彦, 杜建镔. 某减速机构刚度分析及测试[J]. 计算机辅助工程, 2016,25(5): 7-11.(BAI Huiyan, DU Jianbin. Stiffness analysis and test on decelerating mechanism[J]. Computer Aided Engineering,2016,25(5): 7-11.(in Chinese))
    [11]
    GOLUB G H, VAN LOAN C F. Matrix Computation [M]. 4th ed. Baltimore: Johns Hopkins University Press, 2013.
    [12]
    KARLSSON S E S. Identification of external structure loads from measured harmonic responses[J]. Journal of Sound and Vibration,1996,196(1): 59-74.
    [13]
    LMS Egineering Innovation. Inverse force identification: tutorial[Z]. 2012.
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (1072) PDF downloads(247) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return