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- W2138143604 abstract "An iterative regularization method, i.e. the conjugate gradient method (CGM) is applied to an inverse non-linear force vibration problem to estimate the unknown time-dependent stiffness coefficients (or spring constants) in a damped system by using the measured system displacement. It is assumed that no prior information is available on the functional form of the unknown stiffness coefficients in the present study, thus, it is classified as the function estimation in inverse calculation. The accuracy of the inverse analysis is examined by using the simulated exact and inexact displacement measurements. The numerical simulations are performed to test the validity of the present algorithm by using different types of stiffness coefficients and measurement errors. Results show that an excellent estimation on the time-dependent spring constants can be obtained with any arbitrary initial guesses within a couple of seconds of CPU time at Pentium III-500 MHz PC. Copyright © 2001 John Wiley & Sons, Ltd." @default.
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- W2138143604 date "2001-01-01" @default.
- W2138143604 modified "2023-09-26" @default.
- W2138143604 title "A non-linear inverse vibration problem of estimating the time-dependent stiffness coefficients by conjugate gradient method" @default.
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- W2138143604 doi "https://doi.org/10.1002/nme.83" @default.
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