Full-field DIC-based model updating for localized parameter identification

Zaletelj, Klemen (author), Slavič, Janko (author), Boltežar, Miha (author)

Identifying the local properties of a structure, either to perform structural health monitoringor to fine tune a numerical model, requires the updating of a large number of parameters.With a high spatial density, but a low dynamic range response information, high-speed-camerameasurements have the potential to identify a large number of localized parameters. In contrast,accelerometer measurements provide low-spatial-density modal shapes, but a high dynamicrange, and introduce the problem of mass loading. In this research, modal shapes from ahigh-speed camera are used, providing full-field response information about the observedstructure and an over-determined optimization problem. Since the high-speed camera has alower dynamic range than the accelerometer and the signal-to-noise ratio is low where thedisplacement amplitude is small, location-specific weighting methods were introduced. Thenumerical and real experiments showed that the accelerometer`s positioning is important forsuccessful updating, while with a high-speed-camera measurement this is not relevant. Thisresearch showed that due to the spatial over-determination, the model updating based on high-speed-camera data, was significantly better than the low-spatial-resolution, accelerometer-basedapproach.

• Language: English
• Keywords: full-field response, digital image correlation, finite-element-model updating, localized parameters
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Author Accepted Manuscript
• Year: 2022
• Number of pages: Str. 1-14
• Numbering: Vol. 164, art. 108287
• PID: 20.500.12556/RUL-128873
• UDC: 004.932:519.61
• ISSN on article: 0888-3270
• DOI: 10.1016/j.ymssp.2021.108287
• COBISS.SI-ID: 72574211
• Publication date in RUL: 09.08.2021

Record is a part of a journal

• Title: Mechanical systems and signal processing
• Shortened title: Mech. syst. signal process.
• Publisher: Elsevier
• ISSN: 0888-3270
• COBISS.SI-ID: 169243

Licences

• License: CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Description: The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
• Licensing start date: 01.02.2022

Secondary language

• Language: Slovenian
• Keywords: modalne oblike polnega polja, korelacija digitalnih slik, modelno posodabljanje, lokalizirani parametri

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: N2-0144
• Name: Optična metoda za obratovalno identifikacijo reduciranega nelinearnega modela

• Funder: ARRS - Slovenian Research Agency
• Project number: J2-1730
• Name: Polno zaznavanje prostorskih vibracij s hitro kamero z aplikacijami v digitalnih dvojčkih in oddaljenem zaznavanju