Nonlinear finite element model updating of an infilled frame based on identified time-varying modal parameters during an earthquake

2014 ◽  
Vol 333 (23) ◽  
pp. 6057-6073 ◽  
Author(s):  
Eliyar Asgarieh ◽  
Babak Moaveni ◽  
Andreas Stavridis
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Model Updating ◽  
Element Model ◽  
Nonlinear Finite Element ◽  
Modal Parameters ◽  
Finite Element Model Updating ◽  
Time Varying ◽  
Infilled Frame ◽  
Nonlinear Finite Element Model

Adaptive Kalman filters for nonlinear finite element model updating

2020 ◽  
Vol 143 ◽  
pp. 106837 ◽  
Author(s):  
Mingming Song ◽  
Rodrigo Astroza ◽  
Hamed Ebrahimian ◽  
Babak Moaveni ◽  
Costas Papadimitriou
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Kalman Filters ◽  
Model Updating ◽  
Element Model ◽  
Nonlinear Finite Element ◽  
Finite Element Model Updating ◽  
Nonlinear Finite Element Model

scholarly journals Experimental Studies on Finite Element Model Updating for a Heated Beam-Like Structure

2015 ◽  
Vol 2015 ◽  
pp. 1-15 ◽  
Author(s):  
Kaipeng Sun ◽  
Yonghui Zhao ◽  
Haiyan Hu
Keyword(s):  
Finite Element ◽  
High Temperature ◽  
Finite Element Model ◽  
Natural Frequencies ◽  
Model Updating ◽  
Element Model ◽  
Modal Parameters ◽  
Finite Element Model Updating ◽  
Time Varying ◽  
The Finite Element Model

An experimental study was made for the identification procedure of time-varying modal parameters and the finite element model updating technique of a beam-like thermal structure in both steady and unsteady high temperature environments. An improved time-varying autoregressive method was proposed first to extract the instantaneous natural frequencies of the structure in the unsteady high temperature environment. Based on the identified modal parameters, then, a finite element model for the structure was updated by using Kriging meta-model and optimization-based finite-element model updating method. The temperature-dependent parameters to be updated were expressed as low-order polynomials of temperature increase, and the finite element model updating problem was solved by updating several coefficients of the polynomials. The experimental results demonstrated the effectiveness of the time-varying modal parameter identification method and showed that the instantaneous natural frequencies of the updated model well tracked the trends of the measured values with high accuracy.

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