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Finite element model updating with damping identification
Journal of Sound and Vibration, 2009Abstract Most of finite element model updating techniques do not employ damping matrices and hence, cannot be used for accurate prediction of complex frequency response functions (FRFs). In this paper, damped finite element model updating procedure is proposed and tested with the objective that the damped finite element updated model is able to ...
Vikas Arora, S.P. Singh, T.K. Kundra
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Finite Element Model Updating Accounting for Modeling Uncertainty
2019A novel approach to deal with modeling uncertainty when updating mechanics-based finite element (FE) models is presented. In this method, a dual adaptive filtering approach is adopted, where the Unscented Kalman filter (UKF) is used to estimate the unknown parameters of the nonlinear FE model and a linear Kalman filter (KF) is employed to estimate the ...
Rodrigo Astroza +2 more
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Finite element model updating of smart structures with direct updating algorithm
Physica Scripta, 2022Abstract In this paper, a finite element model updating algorithm is proposed to enhance the accuracy of the simulated finite element model of a smart structure (collocated piezoelectric patches embedded on a cantilever beam). Piezoelectric patches are used to sense and control the excessive vibrations of the structures.
Shivam Verma +3 more
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REGULARISATION METHODS FOR FINITE ELEMENT MODEL UPDATING
Mechanical Systems and Signal Processing, 1998Abstract This paper addresses the problem of selecting a side constraint and determining the regularisation parameter in model updating. The weight to be attached to the constraint is determined by the regularisation parameter. Methods based on singular value decomposition, cross-validation, and L-curves are considered, and results obtained by ...
H. Ahmadian +2 more
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An improved optimal elemental method for updating finite element models
Earthquake Engineering and Engineering Vibration, 2004The optimal matrix method and optimal elemental method used to update finite element models may not provide accurate results. This situation occurs when the test modal model is incomplete, as is often the case in practice. An improved optimal elemental method is presented that defines a new objective function, and as a byproduct, circumvents the need ...
Duan Zhongdong +3 more
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Generic element matrices suitable for finite element model updating
Mechanical Systems and Signal Processing, 1995Abstract Updating procedures are concerned with the construction of mass, stiffness and (possibly) damping matrices, near to some base matrices, which yield some response data close to some experimental values. One of the fundamental questions in updating relates to the criteria for allowable mass and stiffness matrices.
G.M.L. Gladwell, H. Ahmadian
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Correlation and Updating of an Unmanned Aerial Vehicle Finite Element Model
56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2015In this paper the numerical models of the structural components of an UAV are separately correlated with their experimental counterparts and then updated, in order to improve the correlation. A sensitivity-based updating method is considered and its capabilities to identify changes of the design parameters that are physically acceptable investigated ...
A. S. Mezzapesa +5 more
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Stochastic Finite Element Model Updating by Bootstrapping
2016This paper presents a new stochastic finite element model calibration framework for estimation of the uncertainty in model parameters, which combines the principles of bootstrapping with the technique of FE model calibration with damping equalization. The bootstrapping allows to quantify the uncertainty bounds on the model parameters by constructing a ...
Vahid Yaghoubi +3 more
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ON A STATISTICAL OPTIMIZATION METHOD USED IN FINITE ELEMENT MODEL UPDATING
Journal of Sound and Vibration, 2000Bayesian estimator is a commonly used statistical optimization technique for finite element model updating. This paper presents a modified Bayesian estimator and discusses its unbiasedness, efficiency, learning ability and robustness. The main differences from other estimators, for instance, the least-squares method, are shown.
Hua, Hongxing +2 more
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Model updating of finite element model using optimisation routine
Aircraft Engineering and Aerospace Technology, 2016Purpose The present paper aims to describe the model updating of a small aircraft dynamic finite element model (FEM) to improve its agreement with ground vibration test (GVT) data. Design/methodology/approach An automatic updating method using an optimization procedure is carried out.
Bimo Prananta +3 more
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