New methods for finite element model updating problems

Yuen Cheng Kuo*, Wen-Wei Lin, Shufang Xu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

56 Scopus citations


We consider two finite element model updating problems, which incorporate the measured modal data into the analytical finite element model, producing an adjusted model on the (mass) damping and stiffness, that closely matches the experimental modal data. We develop two efficient numerical algorithms for solving these problems. The new algorithms are direct methods that require script O sign(nk 2) and script O sign(nk 2 + k 2) flops, respectively, and employ sparse matrix techniques when the analytic model is sparse. Here n is the dimension of the coefficient matrices defining the analytical model, and k is the number of measured eigenpairs.

Original languageEnglish
Pages (from-to)1310-1316
Number of pages7
JournalAIAA Journal
Issue number6
StatePublished - 1 Jun 2006

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