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|Title: ||Application of the Multi Scaling Characteristic Time Expansion Method for Estimating Nonlinear Restoring Forces|
|Authors: ||Yung-Wei Chen;Jiang-Ren Chang;Fu-Hsuan Hsieh;Che-Wei Chen|
|Issue Date: ||2017-02-06T06:52:30Z
|Publisher: ||Structural Longevity|
|Abstract: ||Abstract:Since numerical instability phenomena always arise in the solving
process for parameters identification of structural vibration. To resolve such a problem,
the multi scaling characteristic time expansion method (MSCTEM) in conjunction
with the natural regularization method is adopted to overcome the higher
order numerical oscillation problem when polynomial series expansion is necessary.
Due to inclusion of the characteristic length (CL) in the scheme, the ill-posed
problem of the constructed Vandwemonde matrix will be overcome and will also
increase the term number of polynomial series. Thus, the ill condition and numerical
instability of numerical calculations can be resolved. Besides, to overcome the
numerical instability problem of a noise disturbance, in contrast to the conventional
Tikhonov regularization method, the natural regularization method is again adopted
to resolve the problem. It is shown that the MSCTEM with the natural regularization
method can effectively resolve those above mentioned problems through three
|Relation: ||9(1), pp.37–58|
|Appears in Collections:||[輪機工程學系] 期刊論文|
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