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- W2384209218 abstract "A modal updating method based on local time series is proposed,such that the local substructure can be updated effectively by the free response or the stochastic response at the corresponding substructural location of the whole structure.The Isolated Substructure refers to a new simple and independent structure,equivalent to the concerned substructure,which is isolated from the global structure by numerically constraining the substructure boundary response according to the superposition theorem of linear elastic structures.It is significant especially when only part of the structure needs to be modified.In this method,firstly a long discrete response of the substructure is divided into several sub-time series with delayed time steps in turn;then the responses of the substructural boundary are restricted by the linear combination of the sub-time series,thereby the vibration of the Isolated Substructure is constructed by isolating the influence from the whole structure;Lastly the local substructure is updated through the model identification and model updating of the Isolated Substructure,which contains fewer elements and can be updated easier and faster.The computational accuracy is improved by eliminating the influences from the other parts of the structure.Numerical example of a plane truss is given to demonstrate the effectiveness of this method by utilizing the accelerations of free vibration and stochastic displacement responses.Moreover,the result is also acceptable when 5% noise is taken into consideration." @default.
- W2384209218 created "2016-06-24" @default.
- W2384209218 creator A5051755939 @default.
- W2384209218 date "2009-01-01" @default.
- W2384209218 modified "2023-09-23" @default.
- W2384209218 title "Isolated substructure model updating based on local time series" @default.
- W2384209218 hasPublicationYear "2009" @default.
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