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

Abstract

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.

Keywords

full-field response;digital image correlation;finite-element-model updating;localized parameters;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 004.932:519.61
COBISS: 72574211 Link will open in a new window
ISSN: 0888-3270
Views: 319
Downloads: 20
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Other data

Secondary language: Slovenian
Secondary keywords: modalne oblike polnega polja;korelacija digitalnih slik;modelno posodabljanje;lokalizirani parametri;
Type (COBISS): Article
Embargo end date (OpenAIRE): 2024-02-01
Pages: str. 1-14
Issue: ǂVol. ǂ164
Chronology: 1. Feb. 2022
DOI: 10.1016/j.ymssp.2021.108287
ID: 13223759