Dinamični vplivi na nosilno konstrukcijo dvigala pri vrtenju nadgradnje = [Dynamic influences on crane steel structure during gyration motion of slewing upper structure] : magisterij
Jerman, Boris, 1967-
Vibracije in nihanje bremena pri dvigalih z vrtljivo nadgradnjo se pojavijo v glavnem med vrtenjem nadgradnje dvigala okoli vertikalne osi in translatornim gibanjem obesišča bremena v radialni smeri. ...V delu je obravnavano le vrtenje nadgradnje, ki je mnogo manj raziskano kot translatorno gibanje. Izdelan je fizikalno-matematični model dvigala. Upoštevana je nelinearnost nihanja bremena na vrvi za večje odklonske kote in nelinearnost pogona. Upoštevane so tudi elastičnosti konstrukcije, ter trenje, dušenje v materialu in zračni upor. S pomočjo modela so določeni koti nihanja visečega bremena med transportom. Izračunane so tudi dinamične obremenitve, ki delujejo na nosilno konstrukcijo. Za potrditev veljavnosti fizikalno-matematičnega modela je zgrajen še fizični model, na katerem so izvedene ustrezne meritve. Rezultati so primerjani v časovnem prostoru in tudi s pomočjo pripadajočih obremenitvenih kolektivov.
Type of material - master's thesis
; adult, serious
Publication and manufacture - Ljubljana : [B. Jerman], 1999
M JERMAN B. Dinamični IN: 00044223
M JERMAN B. Dinamični IN: 00044223
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