@inproceedings{f0c270a7babb439a88671fd3f0dd389c,
title = "Localisation, characterisation and identification of localised nonlinearity in structural dynamics using base excitation frequency response functions",
abstract = "Identification of structural nonlinearities has been of great interest over recent decades. In addition, due to high cost and time requirements, it is not practical to have complete experimental measurements. This study is initially focused on the localisation of structural nonlinearities using an approach based on spatially incomplete experimental frequency domain data from a structural vibration test. A cantilever beam with a nonlinear restoring force is considered under stepped-sine base excitation. An updated linear finite element model and the Craig-Bampton reduction method is used to obtain the reduced nonlinear forces (RNFs) in the measured region, leading to the location decision for nonlinear elements. Then, the Equivalent Dynamic Stiffness Mapping technique is used for characterization and mathematical modelling of the unknown nonlinearities. This technique utilizes the ratio of internal forces and the displacement response of the unknown elements (F/X) in the frequency domain as the Equivalent Dynamic Stiffness.",
keywords = "Base excitation, Equivalent dynamic stiffness mapping, Finite element model updating, Frequency response function, Identification, Nonlinear structural dynamics",
author = "J. Taghipour and {Haddad Khodaparast}, H. and Friswell, {M. I.} and H. Jalali and H. Madinei and X. Wang",
year = "2018",
month = jan,
day = "1",
language = "English",
series = "Proceedings of ISMA 2018 - International Conference on Noise and Vibration Engineering and USD 2018 - International Conference on Uncertainty in Structural Dynamics",
publisher = "KU Leuven - Departement Werktuigkunde",
pages = "2127--2138",
editor = "D. Moens and W. Desmet and B. Pluymers and W. Rottiers",
booktitle = "Proceedings of ISMA 2018 - International Conference on Noise and Vibration Engineering and USD 2018 - International Conference on Uncertainty in Structural Dynamics",
note = "28th International Conference on Noise and Vibration Engineering, ISMA 2018 and 7th International Conference on Uncertainty in Structural Dynamics, USD 2018 ; Conference date: 17-09-2018 Through 19-09-2018",
}