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Dimenzioniranje skeletnih elementov geodetske kupole obremenjene s hidrostatičnim tlakom
ID Nabergoj, Andrej (Author), ID Brojan, Miha (Mentor) More about this mentor... This link opens in a new window

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MD5: B5D73B912614B057DEF6EA9D70EE5F27
PID: 20.500.12556/rul/18e7a3bb-0ea3-4cae-8216-e4b94ad881cf

Abstract
V zaključni nalogi je obravnavan problem dimenzioniranja nosilnih konstrukcij (s poudarkom na geodetskih kupolah), prekritih z membransko kritino, ki je obremenjena s hidrostatičnim tlakom. Motivacija za preučevanje konstrukcij pod tako obremenitvijo so podvodni habitati ali habitati v breztežnostnem prostoru. Za preračun deformacije in napetosti različnih konstrukcij, je izdelan numerični model po metodi končnih elementov, v katerem zamenjamo membrano in tlačno obremenitev z aproksimirano porazdelitvijo reakcijskih sil po obodu membrane. Opisan je sistem generiranja mreže končnih elementov skeletne strukture in funkcijsko porazdeljene obremenitve na ustrezna vozlišča končnih elementov. S tem je postopek modeliranja take konstrukcije poenostavljen. Za določitev aproksimacijske funkcije sil je bil prav tako uporabljen numerični pristop po metodi končnih elementov. Pri numeričnih izračunih prečno obremenjenih, začetno ravnih membran pride do težav zaradi nične začetne togosti membran v prečni smeri, ki so bile v naši obravnavi rešene s prednapetjem membrane preko temperaturne obremenitve.

Language:Slovenian
Keywords:geodetske kupole, membranske konstrukcije, poliederi, hidrostatična obremenitev
Work type:Bachelor thesis/paper
Organization:FS - Faculty of Mechanical Engineering
Year:2017
PID:20.500.12556/RUL-95537 This link opens in a new window
Publication date in RUL:20.09.2017
Views:1230
Downloads:473
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Secondary language

Language:English
Title:Dimensioning of skeletal elements of geodetic dome, loaded with hydrostatic pressure
Abstract:
The theme of the final thesis deals with the problem of the design of load-bearing structures (with an emphasis on geodetic domes), covered with a membrane roof covering, and subjected to the hydrostatic pressure. Motivation for studying constructions under such a load is underwater habitats or habitats in an outer space. To calculate the deformation and stress of different constructions, a numerical model is constructed according to the finite element method in which the membrane and the pressure load are replaced by the approximate distribution of the reaction forces along the edge of the membrane. A system for generating a network of finite elements of the skeletal structure and a system for modelling distributed load in the corresponding nodes of the finite elements is described. Thus, the process of modeling such a construction is simplified. A numerical approach using the finite element method was also used to determine the approximation function of force distribution. In numerical calculations of transversely loaded, initial flat membranes, problems arise due to the low initial stiffness of the membranes in the transverse direction. We have resolved this with the membrane preload through the temperature load.

Keywords:geodesic domes membrane constructions polyhedrons hydrostatic load

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