Vpliv stopnje avksetičnosti na območje prepovedanih frekvenc kiralnih struktur

magistrsko delo

Luka Starčevič (Author), Zoran Ren (Mentor), Andrej Košmrlj (Co-mentor)

Abstract

V magistrskem delu so predstavljene mehanske in frekvenčne analize kiralnih avksetičnih struktur. V odvisnosti od geometrijskih parametrov strukture je bilo z eksplicitnimi dinamičnimi analizami izračunano Poissonovo razmerje s programom LS-DYNA. Predstavljeni rezultati prikazujejo vpil geometrijskih parametrov na velikost Poissonovega razmerja. Prav tako so bile izvedene frekvenčne analize z željo ugotoviti območja prepovedanih frekvenc v odvisnosti od stopnje avksetičnosti. Območja prepovedanih frekvenc so bila izračunana z Blochovo valovno analizo v programu ABAQUS. Glede na izračune se vidi vpliv stopnje avksetičnosti velikosti območij prepovedanih frekvenc. Ugotovljeno je bilo, da se pri večanju stopnje avksetičnosti pojavijo dodatna območja prepovedanih frekvenc.

Keywords

avksetične strukture;Poissonovo razmerje;LS-DYNA;Blochova valovna analiza;Blochov teorem;območja prepovedanih frekvenc;ABAQUS;magistrska dela;

Data

Language:	Slovenian
Year of publishing:	2018
Typology:	2.09 - Master's Thesis
Organization:	UM FS - Faculty of Mechanical Engineering
Publisher:	[L. Starčevič]
UDC:	539.2+534.63(043.2)
COBISS:	22147094
Views:	882
Downloads:	114
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Influence of auxetic level on the forbidden frequency gaps of chiral structures
Secondary abstract:	This master thesis presents the mechanical and frequency analyses of auxetic chiral structures. In dependence of geometrical parameters, a Poisson’s ratio study was done with explicit dynamic analyses in the program LS-DYNA. The presented results shows the influence of geometrical parameters on the Poisson’s ratio. In addition, a frequency study is presented with the goal to determinate the influence of auxetic level on forbidden frequency gaps. Bloch wave analysis was used to calculate forbidden frequency gaps in the program ABAQUS. From these results, the influence of auxetic level on the size of forbidden frequency gaps is shown. It was found out, that with increasing the auxetic level new forbidden frequency gaps appear.
Secondary keywords:	auxetic structures;Poisson's ratio;Bloch wave analyises;Bloch's theorem;forbidden frequency gaps;
URN:	URN:SI:UM:
Type (COBISS):	Master's thesis/paper
Thesis comment:	Univ. v Mariboru, Fak. za strojništvo, Kostrukterstvo
Pages:	X, 46 f.
ID:	10939207