Abstract
The steady state shift damage localization (S3DL) method localizes structural deterioration, manifested as either a mass or stiffness perturbation, by interrogating the damage-induced change in the steady state vibration response with damage patterns cast from a theoretical model. Damage is, thus, localized when a postulated damage distribution, under ideal conditions, yields a perfect mapping to the experimental feature. Obviously, this approach poses a constraint on the accuracy of the theoretical model, which, typically, is obtained through finite element (FE) modelling. In order to achieve the required accuracy when examining complex structures, an extensive amount of degrees of freedom (DOF) must often be utilized. Since the interrogation matrix for each damage pattern depends on the size of the system matrices constituting the FE-model, the computational time quickly becomes of first-order importance. The present paper investigates two sub-structuring approaches, in which the idea is to employ Craig-Bampton super-elements to reduce the amount of interrogation distributions while still providing an acceptable localization resolution. The first approach operates on a strict super-element level, while the second combines super-elements and shell elements. The applicability of the proposed approaches is tested in an experimental procedure with a residential-sized wind turbine blade introduced, alternately, to failure of the trailing edge and a modification of the mass.
Original language | English |
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Title of host publication | Proceedings of the International Conference on Structural Engineering Dynamics - ICEDyn 2017 |
Editors | Nuno M. M. Maia, Miguel de Matos Neves, Rui Chedas de Sampaio |
Publisher | ICEDyn |
Publication date | 2017 |
Article number | 62 |
ISBN (Electronic) | 978-989-99424-4-8 |
Publication status | Published - 2017 |
Event | International Conference on Structural Engineering Dynamics ICEDyn 2017 - Ericeira, Portugal Duration: 3 Jul 2017 → 5 Jul 2017 |
Conference
Conference | International Conference on Structural Engineering Dynamics ICEDyn 2017 |
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Country/Territory | Portugal |
City | Ericeira |
Period | 03/07/2017 → 05/07/2017 |
Keywords
- Structural health monitoring (SHM)
- Steady state shift damage localization (S3DL)
- Craig-Bampton super-elements