An iterative method preserves structural connectivity and adjusts inaccurate elements in gyroscopic systems, indicating potential improvements in model accuracy.
It is known that in finite element model updating (FEMU), an important yet challenging problem is how to preserve the structural connectivity and adjust only the inaccurate elements in the coefficient matrices using measured modal data, without altering the accurate elements in the analytical matrices (i.e., local model updating (LMU)). In this paper, an iterative method for solving this problem by using the acceleration-velocity-displacement feedback (AVDF) technique is developed. With this method, the physical connectivity of the original model is preserved, and only the erroneous elements in the analysis matrices are corrected, while the error-free ones remain unchanged, achieving LMU. Numerical examples confirm the effectiveness of the introduced method.
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Zhang et al. (2026) studied this question.
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