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

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

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.

• Jezik: Angleški jezik
• Ključne besede: full-field response, digital image correlation, finite-element-model updating, localized parameters
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Recenzirani rokopis
• Leto izida: 2022
• Št. strani: Str. 1-14
• Številčenje: Vol. 164, art. 108287
• PID: 20.500.12556/RUL-128873
• UDK: 004.932:519.61
• ISSN pri članku: 0888-3270
• DOI: 10.1016/j.ymssp.2021.108287
• COBISS.SI-ID: 72574211
• Datum objave v RUL: 09.08.2021

Gradivo je del revije

• Naslov: Mechanical systems and signal processing
• Skrajšan naslov: Mech. syst. signal process.
• Založnik: Elsevier
• ISSN: 0888-3270
• COBISS.SI-ID: 169243

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.
• Začetek licenciranja: 01.02.2022

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: modalne oblike polnega polja, korelacija digitalnih slik, modelno posodabljanje, lokalizirani parametri

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: N2-0144
• Naslov: Optična metoda za obratovalno identifikacijo reduciranega nelinearnega modela

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: J2-1730
• Naslov: Polno zaznavanje prostorskih vibracij s hitro kamero z aplikacijami v digitalnih dvojčkih in oddaljenem zaznavanju