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A structural model updating method using incomplete power spectral density function and modal data
Akbar Esfandiari,Maryam Ghareh Chaei,Fayaz R. Rofooei 국제구조공학회 2018 Structural Engineering and Mechanics, An Int'l Jou Vol.68 No.1
In this study, a frequency domain model updating method is presented using power spectral density (PSD) data. It uses the sensitivity of PSD function with respect to the unknown structural parameters through a decomposed form of transfer function. The stiffness parameters are captured with high accuracy through solving the sensitivity equations utilizing the least square approach. Using numerically noise polluted data, the model updating results of a truss model prove robustness of the method against measurement and mass modelling errors. Results prove the capabilities of the method for parameter estimation using highly noise polluted data of low ranges of excitation frequency.
A structural model updating method using incomplete power spectral density function and modal data
Esfandiari, Akbar,Chaei, Maryam Ghareh,Rofooei, Fayaz R. Techno-Press 2018 Structural Engineering and Mechanics, An Int'l Jou Vol.68 No.1
In this study, a frequency domain model updating method is presented using power spectral density (PSD) data. It uses the sensitivity of PSD function with respect to the unknown structural parameters through a decomposed form of transfer function. The stiffness parameters are captured with high accuracy through solving the sensitivity equations utilizing the least square approach. Using numerically noise polluted data, the model updating results of a truss model prove robustness of the method against measurement and mass modelling errors. Results prove the capabilities of the method for parameter estimation using highly noise polluted data of low ranges of excitation frequency.