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Topologická optimalizace s využitím mikro-prutových struktur

Authors: Černák, Martin;

Topologická optimalizace s využitím mikro-prutových struktur

Abstract

Cieľom práce bolo navrhnúť a overiť metodiku topologickej optimalizácie s využitím mikro-prútových štruktúr, ktorá zohľadňuje špecifikácie aditívnej výroby a je nezávislá na optimalizačnom riešiči. Vytvorená metodika využíva SIMP algoritmus topologickej optimalizácie. Penalizačný faktor použitý pre riešenie je vytvorený na základe mechanických vlastností charakterizujúcich ľubovoľne zvolenú bunku. Vlastnosti sú získané metódou homogenizácie aplikovanou na reálnu geometriu špecifikovanú 3D optickou digitalizáciou. Verifikácia návrhu prebieha pomocou MKP analýzy využívajúcej variabilné homogenizované vlastnosti. Lokálna napätosť je simulovaná technikou submodelingu. Metodika bola overená optimalizáciou konzoly brzdného štítu lietadla. Optimalizovaný diel je oproti pôvodnému riešeniu o 22 % ľahší a o 31 % tuhší. Výsledky práce demonštrujú, že navrhnutá metodika je vhodná pre optimalizáciu štrukturálnych dielov a umožňuje nám relatívne jednoducho využiť mikro-prútové štruktúry spolu s topologickou optimalizáciou a aditívnou výrobou, a to nie len v leteckom priemysle.

This thesis aimed to develop and verify the methodology for lattice topology optimization, which deals with additive manufacturing specifications and is independent of the optimization solver. The developed methodology uses the SIMP topology optimization algorithm. The penalization factor used for a solution is based on the mechanical properties characterizing arbitrarily chosen unit cell. These are identified using the homogenization method applied to the real geometry specified by 3D optical digitization. Verification is based on FEA using the variable homogenized properties. The local stress response is simulated by submodeling technique. The methodology was verified by optimizing the braking shield bracket of a plane. The optimized part is 22 % lighter and 31 % stiffer than the original solution. Results of the thesis demonstrate that the proposed methodology is suitable for structural part optimization and allows us to use lattice structures together with topology optimization and additive manufacturing relatively easily, not only in the space industry.

A

Country
Czech Republic
Related Organizations
Keywords

Additive manufacturing, Lattice structures, Aditívna výroba, Topology optimization, Topologická optimalizácia, Mikro-prútové štruktúry

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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