Model Updating with Closed-Loop Strain Mode Shapes

Ha, Jae-Hoon; Park, Youngjin; Park, Younsik

doi:10.2514/1.29491

Cited by 8 publications

(1 citation statement)

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“…As the function of second derivatives of the classical displacement mode shapes (DMSs), strain mode shapes [9] have been applied in structural dynamic modelling, damage detection and dynamic design due to having high sensitivity [10][11][12][13][14]. In recent years, strain measurement based methods have been successfully developed to improve the local outperformance of model updating [15][16][17]. In the comparison of classic and strain experimental modal analysis (EMA), Kranjc et al [18] pointed out that the advantage of strain EMA was the usefulness for an experimental investigation of the stress-strain response, which can be important for dynamic fatigue and damage detection.…”

Section: Introductionmentioning

confidence: 99%

A revisit to normalization methods for purpose of stress mode shapes

Zhou¹

2020

FME Transactions

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In order to accurately interpret the results of modal analysis for the purpose of stress mode shapes (SMSs), this work revisits the normalization methods in computational structural dynamics. Firstly, the fundamental principle of structural dynamics analysis and mode of normalization were concisely introduced, and the critical parameters affecting SMSs were discussed. Secondly, the displacement and mass normalizations were applied to the case study of a beam structure. Detailed comparisons were considered between the SMSs and the conventional displacement mode shapes (DMSs) with different normalization methods. Lastly, some important characteristics were obtained. Present study can serve as an ongoing research effort aimed at evaluating both the SMSs and DMSs for future dynamic damage/failure analysis.

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