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Shock and Vibration
Volume 1 (1994), Issue 4, Pages 339-348

On the Effectiveness of Using Only Eigenvalues in Structural Model Updating Problems

A.S. Nobari and D.J. Ewins

Mechanical Engineering Department, Imperial College, UK

Received 28 October 1993; Accepted 9 December 1993

Copyright © 1994 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In this article the subject of model updating using the inverse eigensensitivity method that uses only eigenvalues in the calculation is examined. The problem of creating an underdetermined set of equations is studied and ways of preventing it are addressed.