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FME Transactions
2011, vol. 39, br. 1, str. 17-24
jezik rada: engleski
neklasifikovan

Razmatranje uticaja pokretnog oscilatora na dinamičko ponašanje mosne dizalice
Univerzitet u Beogradu, Mašinski fakultet

e-adresa: vgasic@mas.bg.ac.rs

Projekat

Održivost i unapredenje mašinskih sistema u energetici i transportu primenom forenzickog inženjerstva, eko i robust dizajna (MPNTR - 35006)

Sažetak

U radu je razmatrano dinamičko ponašanje noseće konstrukcije mosne dizalice usled dejstva ovešenog tereta na kolicima koja se kreću determinisanom brzinom. Glavni nosač je modeliran kao greda podeljena na 10 elemenata, kolica kao pokretna masa i teret kao masa, koja je ovešena na kolica sistemom užadi modeliranim oprugom. Matrice inercije, prigušenja i krutosti se računaju za svaki vremenski interval, a ekvivalentno spoljašnje opterećenje grede je formulisano kroz konačnoelementni pristup problemu. Jednačine kretanja sistema sa konačnim brojem stepena slobode su prikazane za model pokretnog oscilatora koji se kreće determinisanom brzinom po grednom nosaču. Dinamički odziv (ugib, brzine, ubrzanja) za sve stepene slobode je dobijen rešavanjem jednačina numerički, metodom direktne integracije. Verifikacija celog algoritma je data kroz poređenje rešenja za dinamički ugib proste grede pod dejstvom pokretne sile koja se kreće konstantnom brzinom. U radu je razmatran uticaj brzine kretanja kolica i krutosti opruge na dinamičko ponašanje noseće konstrukcije dizalice.

Ključne reči

moving oscillator; crane structure; transverse vibrations; dynamic response; direct integration

Reference

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