Dynamic Model Updating Using Virtual Antiresonances
Dynamic Model Updating Using Virtual Antiresonances
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DOI：
10.1155/2004/570128
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发表时间：
2004
影响因子：
1.6
通讯作者：
W. D’Ambrogio;A. Fregolent
中科院分区：
文献类型：
--
作者：
W. D’Ambrogio;A. Fregolent
本文考虑了模型修正方法的扩展，除了固有频率误差，反共振误差最小化。通过定义虚拟反共振，这种扩展允许使用以前确定的模态数据。虚拟反共振可以从截断模态展开中计算，并且不对应于任何物理系统。该方法适用于有限元模型更新的GARTEUR基准，在欧洲项目内使用的更新。结果进行了比较，与以前获得的计算低，高频率的残差后，通过估计实际的反共振，并通过使用识别和分析模态之间的相关性（MAC）获得的结果。
This paper considers an extension of the model updating method that minimizes the antiresonance error, besides the natural frequency error. By defining virtual antiresonances, this extension allows the use of previously identified modal data. Virtual antiresonances can be evaluated from a truncated modal expansion, and do not correspond to any physical system. The method is applied to the Finite Element model updating of the GARTEUR benchmark, used within an European project on updating. Results are compared with those previously obtained by estimating actual antiresonances after computing low and high frequency residuals, and with results obtained by using the correlation (MAC) between identified and analytical mode shapes.