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- W2131680091 abstract "A new efficient method of eigenvalue reanalysis has been developed based on the perturbation method such that first the differential equations which describe the change of the eigenvalues and eigenvectors of a system being modified are derived from the perturbation method and then the solutions of these equations are obtained by following them up with the solutions of more simple equations. The special features of this method are that it can give a clear correspondence between the eigenpairs before and after system modification, and that the computer run time spent by this method is far shorter than that of revised analysis by FEM when only a few selected modes are used in the form of an approximate computation. In addition, this approximate computation can give more accurate results than the perturbation method. The efficiency of the proposed method has been verified by applying it to a simple spring-mass model as well as a 600 degrees-of-freedom model which receive structural modification." @default.
- W2131680091 created "2016-06-24" @default.
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- W2131680091 date "1988-01-01" @default.
- W2131680091 modified "2023-09-27" @default.
- W2131680091 title "Eigenvalue reanalysis by improved perturbation" @default.
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- W2131680091 doi "https://doi.org/10.1002/nme.1620260112" @default.
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