Interval model updating with irreducible uncertainty using the Kriging predictor

2011 ◽  
Vol 25 (4) ◽  
pp. 1204-1226 ◽  
Author(s):  
Hamed Haddad Khodaparast ◽  
John E. Mottershead ◽  
Kenneth J. Badcock
Keyword(s):  
Model Updating ◽  
Interval Model ◽  
Irreducible Uncertainty ◽  
Kriging Predictor

scholarly journals Model Updating of Complex Structures Using the Combination of Component Mode Synthesis and Kriging Predictor

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Yang Liu ◽  
Yan Li ◽  
Dejun Wang ◽  
Shaoyi Zhang
Keyword(s):  
Large Scale ◽  
Structural Model ◽  
Model Updating ◽  
Element Model ◽  
Component Mode Synthesis ◽  
Complex Structures ◽  
Large Scale Structures ◽  
Large Size ◽  
Key Issues ◽  
Kriging Predictor

Updating the structural model of complex structures is time-consuming due to the large size of the finite element model (FEM). Using conventional methods for these cases is computationally expensive or even impossible. A two-level method, which combined the Kriging predictor and the component mode synthesis (CMS) technique, was proposed to ensure the successful implementing of FEM updating of large-scale structures. In the first level, the CMS was applied to build a reasonable condensed FEM of complex structures. In the second level, the Kriging predictor that was deemed as a surrogate FEM in structural dynamics was generated based on the condensed FEM. Some key issues of the application of the metamodel (surrogate FEM) to FEM updating were also discussed. Finally, the effectiveness of the proposed method was demonstrated by updating the FEM of a real arch bridge with the measured modal parameters.

The Time Course of Situation Model Updating

2008 ◽  
Author(s):  
W. Matthew Collins ◽  
Keith Rayner
Keyword(s):  
Time Course ◽  
Model Updating ◽  
Situation Model

Representation of bolted joints in a structure using finite element modelling and model updating

2020 ◽  
Vol 14 (3) ◽  
pp. 7141-7151 ◽  
Author(s):  
R. Omar ◽  
M. N. Abdul Rani ◽  
M. A. Yunus
Keyword(s):  
Finite Element ◽  
Dynamic Behaviour ◽  
Model Updating ◽  
Complex Structure ◽  
Bolted Joints ◽  
Model Parameters ◽  
Fe Model ◽  
Bolted Joint ◽  
Fe Modelling ◽  
Joint Structure

Efficient and accurate finite element (FE) modelling of bolted joints is essential for increasing confidence in the investigation of structural vibrations. However, modelling of bolted joints for the investigation is often found to be very challenging. This paper proposes an appropriate FE representation of bolted joints for the prediction of the dynamic behaviour of a bolted joint structure. Two different FE models of the bolted joint structure with two different FE element connectors, which are CBEAM and CBUSH, representing the bolted joints are developed. Modal updating is used to correlate the two FE models with the experimental model. The dynamic behaviour of the two FE models is compared with experimental modal analysis to evaluate and determine the most appropriate FE model of the bolted joint structure. The comparison reveals that the CBUSH element connectors based FE model has a greater capability in representing the bolted joints with 86 percent accuracy and greater efficiency in updating the model parameters. The proposed modelling technique will be useful in the modelling of a complex structure with a large number of bolted joints.

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