Naslov
Non-contact full-field damping identification for structural health monitoring and failure

Autori
Tomac, Ivan ; Slavič, Janko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Svet strojništva / Cigale, Andreja - Ljubljana, 2022, 60-61

Skup
Akademija strojništva 2022

Mjesto i datum
Ljubljana, Slovenija, 23.11.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Morlet-wave ; damping ; spatial distribution ; full-field

Sažetak
The damping in structures is a dynamic property that represents the dissipation of energy caused by the vibrational motion. Identifying damping is not a trivial task as it is sensitive to various influences, such as noise. Nowadays, high-speed cameras offer the possibility to measure the full- field displacement response from the surface of the structure without contact. Responses measured in this way are noisy, especially in the high frequency range, which makes it difficult to identify the damping, especially with classical methods. We present a Morlet wave damping identification method, which is based on the continuous wavelet transform. It is as good as the CWT, except that it is much faster and does not suffer from the influence of the edge effect. Overdetermination is used to improve identification results by applying spatial averaging. The damping was identified up to 2.5kHz using the aluminium beam as an experimental example.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo, Strojarstvo, Zrakoplovstvo, raketna i svemirska tehnika

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