Mechanics in Engineering ›› 2004, Vol. 26 ›› Issue (2): 0-0.doi: 10.6052/1000-0992-2002-382
• Education Study •
In order to decrease the numbers of identification
parameters and overcome difficulties in computation, the rank of structure
should be reduced at first. In this paper, the rank of structure
model is reduced by K-L(Karhunen-Loeve) eigenvalue extracting method.
Modal parameters of the reduced model are identified by the least square
method. The number of identification parameters and the computing complexity are
A simple girder is analyzed as an example. A three rank model is
obtained. The identified inherent frequencies and the ratios of modal damping
are close to the analytic result.
K-L method, model rank reduction, least square method, identify
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