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Updating of the complete joint characteristics of finite element model via FRF-based substructuring of complex structures
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Updating of the complete joint characteristics of finite element model via FRF-based substructuring of complex structures
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Journal Article
Updating of the complete joint characteristics of finite element model via FRF-based substructuring of complex structures
2023
Overview
We present a novel method for updating the joint properties, including the rotational degrees of freedom (DOFs), of finite element (FE) models of complex structures. Updating is based on a frequency response function (FRF)-based substructuring (FBS) method. An entire structure is divided into substructures, and the properties of the joints that connect substructures are updated. Reference FRFs measured in the assembled structure are defined. Next, an FBS model is constructed using the rotational DOFs. To update all joint properties of the FE model, the differences between the reference and calculated FRFs are represented using newly defined metrics and minimized. We employ an analytical expression based on the FBS method to calculate the design sensitivities of the joint properties in terms of the rotational DOFs. The method is used to update an FE model of a rail.
Publisher
Korean Society of Mechanical Engineers,Springer Nature B.V,대한기계학회
