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Non-linear structural parameter identification using instantaneous power flow balance approach.
- Source :
-
Inverse Problems in Science & Engineering . May2021, Vol. 29 Issue 5, p636-662. 27p. - Publication Year :
- 2021
-
Abstract
- In this paper, a non-linear parameter identification method for structures is presented, whereby the instantaneous power flow balance of the substructure of interest is enforced. The time-domain power flow into the non-linear substructure is balanced against the power transmitted to adjacent structures, damping and kinetic and strain energies. Enforcing this condition of matching the net power balance to zero, a numerical model is iteratively updated as an inverse problem. Here, the identification is carried out using a non-classical optimization search tool, particle swarm optimization algorithm. A cubic non-linearity in spring and a quadratic non-linearity in damper are modelled for non-linear parameter estimation using power flow concept and is a preliminary stage of non-linear joint parameter identification. Important numerical simulations are presented in this paper, which cover different load cases, measurement points and different combination of non-linearities under noise-free and noisy conditions. The identified results show significant improvements in non-linear identification accuracy compared to previous literature related to non-linear identification. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 17415977
- Volume :
- 29
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Inverse Problems in Science & Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 150982762
- Full Text :
- https://doi.org/10.1080/17415977.2020.1800685