Modeliranje mehanskega odziva lupinske konstrukcije inovativne zemeljske postaje

magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo

Jan Tomec (Author), Miroslav Halilovič (Mentor)

Abstract

Napihljive konstrukcije v praksi niso zelo pogoste, saj so zahtevne z vidika dimenzioniranja zadostne togosti in vzdržljivosti. V primeru dobrega načrtovanja pa ima lahko taka konstrukcija številne prednosti. Ponavadi so lažje in cenejše, v konkretni aplikaciji za zemeljske postaje pa je pomembno tudi, da s kovinskimi elementi ne motijo elektromagnetnih signalov. Ker so te postaje postavljene v okolje, so izpostavljene vsem vrstam vremenskih vplivov. V tej nalogi je predstavljena teorija, ki je potrebna za mehansko analizo napihljive lupinske konstrukcije, prikazani so analitični in eksperimentalni validacijski primeri, na koncu pa je dodan še numerični model zemeljske postaje Stream. Specifika sferične geometrije je povzročila zanimive deformacijske oblike pri tlačnem obremenjevanju. Taki konstrukciji pri preseženi kritični obremenitvi močno pade togost, zaradi česar je prikazan tudi postopek določevanja kritične obremenitve.

Keywords

magistrske naloge;napihljive konstrukcije;lupine;metoda končnih elementov;hiperelastični materialni modeli;zemeljske postaje;

Data

Language:	Slovenian
Year of publishing:	2019
Typology:	2.09 - Master's Thesis
Organization:	UL FS - Faculty of Mechanical Engineering
Publisher:	[J. Tomec]
UDC:	624.074.43:519.61(043.2)
COBISS:	16964123
Views:	639
Downloads:	295
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Modelling the mechanical response of the shell structure of radome
Secondary abstract:	Inflatable structures are in practice not that common because they are challenging to design with sufficient rigidness and durability. In the case of proper design can such structures have many advantages. Usually they are lighter and cheaper, in the application of radome however it also important that they do not disturb any of the incoming electromagnetic signals. Since radomes are placed in the environment they are exposed to natural elements. Here we present the theory necessary to mechanically evaluate inflatable shell structures, analytical and experimental validation cases and numerical model to analyse radome. Specifics of spherical geometry cause interesting deformational shapes when under compression. Such structure, when exposed to a load that is beyond critical, loses a lot of its load-bearing capabilities. Due to this we also present a method to determine critical load.
Secondary keywords:	inflatable structures;shells;finite element method;hyperelastic material models;radomes;
Type (COBISS):	Master's thesis/paper
Study programme:	0
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. Ljubljana, Fak. za strojništvo
Pages:	XXIII, 58 str.
ID:	11270647