Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/12294
Title: Model error correction from truncated modal flexibility sensitivity and generic parameters : Part I - Simulation
Authors: Wu, D
Law, SS
Keywords: Finite element method
Generic element
Modal flexibility
Model error
Model updating
Sensitivity
Vibration
Issue Date: 2004
Publisher: Academic Press
Source: Mechanical systems and signal processing, 2004, v. 18, no. 6, p. 1381-1399 How to cite?
Journal: Mechanical systems and signal processing 
Abstract: A great advantage of the flexibility based method is the availability of the large amount of measured information from a few lower modes which can be practically measured. But the modal truncated errors would be significant for a structure with high modal density, and this poses a limitation on the usage of existing flexibility methods. This paper presents the truncated modal flexibility sensitivity with respect to the generic parameters, and a model updating method is proposed based on this sensitivity and incomplete measurement. The loss of contribution from the higher modes to the modal flexibility will not be a source of error in the proposed method. The effect of spatial incompleteness and measurement noise is investigated with numerical studies. The proposed approach is found capable of updating both the systematic model error and local stiffness error separately in a single or two stages under noisy environment.
URI: http://hdl.handle.net/10397/12294
ISSN: 0888-3270
EISSN: 1096-1216
DOI: 10.1016/S0888-3270(03)00094-3
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