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Investigation of natural frequencies of axially loaded thin-walled columns

Abstrakt

The paper deals with correlation between natural frequencies of two steel thin-walled columns and the corresponding applied load. The structures are made of cold-formed lipped channel sections. The columns lengths were assumed to follow two buckling patterns – global flexural and flexural-torsional buckling. In the thicker structure two material models were considered – linearly-elastic and elastic-perfectly plastic. Numerical computations cover dynamic eigenvalue problem, linear buckling and geometrically (and materially) non-linear analysis. The correlation between squares of natural frequencies and the applied load is linear in both columns. The first natural frequencies drop to zero due to structural buckling. This method, called the Vibration Correlation Technique, allows to predict buckling loads on the basis of measured vibration frequencies of the structures. Plasticity does not act upon corresponding curves – the use of the presented technique is limited to the structures exhibiting elastic buckling behaviour.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
publikacja w in. zagranicznym czasopiśmie naukowym (tylko język obcy)
Opublikowano w:
MATEC Web of Conferences nr 219, strony 1 - 8,
ISSN: 2261-236X
Język:
angielski
Rok wydania:
2018
Opis bibliograficzny:
Żmuda-Trzebiatowski Ł.. Investigation of natural frequencies of axially loaded thin-walled columns. MATEC Web of Conferences, 2018, Vol. 219, , s.1-8
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1051/matecconf/201821902018
Weryfikacja:
Politechnika Gdańska

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