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FME Transactions
2018, vol. 46, br. 1, str. 117-123
jezik rada: engleski
vrsta rada: neklasifikovan
objavljeno: 08/02/2018
doi: 10.5937/fmet1801117P
Creative Commons License 4.0
Uticaj uvođenja dinamičkih ograničenja na izvijanje kod problema optimizacije poprečnih preseka rešetkastih nosača
aUniverzitet u Kragujevcu, Fakultet inženjerskih nauka
bUniversity of Rijeka, Faculty of Engineering, Croatia

e-adresa: npetrovic@kg.ac.rs

Sažetak

U ovom radu istraženi su uticaji dodavanja ograničenja na izvijanje problemu optimizacije poprečnih preseka za minimizaciju mase. Uvođenje provere na izvijanje povećava kompleksnost optimizacionog procesa pošto Ojlerov kriterijum izvijanja se menja iz iteracije u iteraciju optimizacije usled promena dimenzija poprečnih preseka elemenata. Rezultujući modeli, koji uzima u obzir ovaj kriterijum, su praktično primenljivi. Za potrebe prikazivanja uticaja dinamičkog ograničenja na izvijanje, optimalni parametarski standardni test modeli rešetkastih nosača sa 10, 17 i 25 štapova iz literature su provereni na izvijanje i upoređeni sa modelima kod kojih je to ograničenje uzeto u obzir. Modeli koji ne uzimaju u obzir izvijanje imaju elemente koji ne zadovoljavaju kriterijum izvijanja. Mase ovih modela su znatno manje od istih koji uzimaju u obzir izvijanje.

Ključne reči

Truss; sizing optimization; Euler buckling; dynamic constraints; genetic algorithm

Reference

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