| Summary: | 博士 === 國立成功大學 === 機械工程研究所 === 84 === A frequency-domain technique is developed in this thesis. The
major goal of this method is to extract the normal modes, to
identify the system matrices and to modify the structure
characteristics. First, a relationship between the normal an By
using the same relationship, a method for estimating the system
matrices of a dynamic system is developed. Independent from
the mass and stiffness matrices, the damping matrix is
calculated alone, while the mass and the stiffness matrices are
identif Furthermore, this idea is extended from a complete
system to deal with an incomplete system. It is shown that the
equivalent condensed system matrices can also be obtained by
this method. These equivalent condensed system matrices
represent a dynamic c Both simulation and experimental examples
are carried out to illustrate the applicability of the present
methods. The results indicate that these methods for extracting
the normal modes, estimating the system matrices and modifying
the structure characte
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