Finite Element Model Updating Using FRF Measurements

Asma, Farid; Bouazzouni, A.

doi:10.1155/2005/581634

Cited by 18 publications

(17 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most of the structures are designated through finite element method (FEM) by engineers, and the developed model must be updated using the responses of the constructed structure. For this purpose, many model‐updating methods are available . Roemer and Mook utilized a time‐domain technique to accurately identify the mass, stiffness, and damping matrices from noisy measurements .…”

Section: Proposed Methodsmentioning

confidence: 99%

Transfer function‐based Bayesian damage detection under seismic excitation

Vahedi

Khoshnoudian

Hsu

et al. 2019

Structural Design Tall Build

View full text Add to dashboard Cite

Summary Transfer function (TF) data are recognized as diagnostic features in damage detection procedure. The objective of this paper is to present a damage detection method in Bayesian paradigm based on TF data due to ground excitation. The measured seismic responses of the structure in the frequency domain are adopted to obtain displacement TFs and the structural natural frequencies are identified from observed TFs. The derived features are utilized for Bayesian structural damage detection. In addition, the challenging issue of underlying flexible soil in real cases has been addressed. The proposed technique is applied to a numerical shear frame to evaluate the capability of the method. An experimental study on a six‐story steel building has been validated to demonstrate the capability of the method for damage detection purpose. The results of studied cases indicated that the proposed method is capable of identifying the location and the severity of damage precisely.

show abstract

Section: Proposed Methodsmentioning

confidence: 99%

Transfer function‐based Bayesian damage detection under seismic excitation

Vahedi

Khoshnoudian

Hsu

et al. 2019

Structural Design Tall Build

View full text Add to dashboard Cite

show abstract

“…By using least squares algorithm to solve the overdetermined equation (17) of the spindle model correcting algorithm, the residual error stabilized after 30 iterations. The variation tendencies of the updated parameters, including the translational stiffness 11 , coupled stiffness 12 , and the rotational stiffness 22 of the joint surface, are respectively depicted in Figures 5(a), 5(b), and 5(c).…”

Section: Applicationmentioning

confidence: 99%

“…Differently, the FRF-based model updating methods make use of the measured FRFs directly which circumvent the need to identify the modal parameters from the experiments [12][13][14][15][16][17]. These methods are able to produce highly accurate updated system matrices through iteration.…”

Section: Introductionmentioning

confidence: 99%

Model Updating of Spindle Systems Based on the Identification of Joint Dynamics

Cao

Cheng

2015

Shock and Vibration

View full text Add to dashboard Cite

In order to simulate the cutting performance of a spindle mounted in the machine tool, the finite element (FE) model of spindles is required to be coupled with machine tool. However, the unknown joint dynamics (e.g., bolts) between the spindle and machine tool column limit the accuracy of the model. In this paper, an FE model updating method is proposed based on the identification of joint dynamics in both translational and rotational degrees-of-freedom (DOF). The receptance coupling (RC) technique is enhanced to estimate frequency response functions (FRFs) corresponding to rotational DOFs. The joint stiffness is identified through the iteration process by minimizing the difference between the simulated FRF and the measured FRF of the assembly. The proposed method is verified with a machine-tool spindle system. The good agreement between simulation and experiment shows the effectiveness of the method.

show abstract

“…Other sensitivity‐based methods have been developed for FRF model updating such as that of Asma and Bouazzouni , which uses analytical sensitivities of the element stiffness and mass matrices to determine damage, and that of Fritzen et al . , which uses state space formulation.…”

Section: Introductionmentioning

confidence: 99%

“…Other sensitivity-based methods have been developed for FRF model updating such as that of Asma and Bouazzouni [14], which uses analytical sensitivities of the element stiffness and mass matrices to determine damage, and that of Fritzen et al [15], which uses state space formulation. More recently, Esfandiari et al [16] developed another analytical sensitivity-based method that is based on changes to elemental stiffness and mass properties at the element level.…”

Section: Introductionmentioning

confidence: 99%

Finite element model updating using frequency response functions and numerical sensitivities

Sipple

Sanayei

2013

Struct. Control Health Monit.

View full text Add to dashboard Cite

SUMMARY A new method is presented for finite element model (FEM) updating using frequency response functions and numerical sensitivities. The proposed method differs from methods currently in the literature by using numerical sensitivities to solve the inverse problem instead of analytical sensitivities. This method combines the usefulness of commercially available finite element modeling programs with advanced optimization algorithms to solve the inverse problem while requiring neither model reduction nor data expansion. The method is applied to several simulated test cases in which damage is detected and the usefulness of the method is shown. The method proved to be robust, stable, error tolerant, and successful in estimating unknown structural parameters using frequency response functions for FEM updating. Copyright © 2013 John Wiley & Sons, Ltd.

show abstract

Finite Element Model Updating Using FRF Measurements

Cited by 18 publications

References 3 publications

Transfer function‐based Bayesian damage detection under seismic excitation

Transfer function‐based Bayesian damage detection under seismic excitation

Model Updating of Spindle Systems Based on the Identification of Joint Dynamics

Finite element model updating using frequency response functions and numerical sensitivities

Contact Info

Product

Resources

About