Buckling prevention in lightweight stiffened structures
Nutakor, Charles (2012)
Nutakor, Charles
Arcada - Nylands svenska yrkeshögskola
2012
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-201205025781
https://urn.fi/URN:NBN:fi:amk-201205025781
Tiivistelmä
The focus of this thesis is to investigate the buckling prevention in lightweight stiffened structures using a finite element model. The emphasis of the investigation presented in this thesis is to find the critical length at which buckling preventers can be attached along the side of a stiffening beam so it can effectively prevent the stiffened structure from buckling.
The investigation was conducted using a finite element model of a lightweight structure and the analysis and simulations were carried out using the NX NASTRAN finite element analysis software. The analysis method is based on a general form of argument known as the reductio ad absurdum. During the investigation the critical length Lc was studied as a function of slenderness ratio Sr of a slender beam, where the width t is constant and the height h is variable.
The critical length Lc at which the buckling preventer becomes irrelevant was determined for five different slenderness of the beam. The imperial finding is
Lc=222,3S_r+981,7 [mm]
R^(2 )= 0, 9984 10where R^(2 ) is the coefficient of determination
The investigation was conducted using a finite element model of a lightweight structure and the analysis and simulations were carried out using the NX NASTRAN finite element analysis software. The analysis method is based on a general form of argument known as the reductio ad absurdum. During the investigation the critical length Lc was studied as a function of slenderness ratio Sr of a slender beam, where the width t is constant and the height h is variable.
The critical length Lc at which the buckling preventer becomes irrelevant was determined for five different slenderness of the beam. The imperial finding is
Lc=222,3S_r+981,7 [mm]
R^(2 )= 0, 9984 10