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An investigation of slewing-crane dynamics during slewing motion-developmentand verification of a mathematical model
Jerman, Boris (Avtor), Podržaj, Primož (Avtor), Kramar, Janez (Avtor)

URLURL - Predstavitvena datoteka, za dostop obiščite http://www.sciencedirect.com/science/journal/00207403 Novo okno

Izvleček
Information about the dynamic loading of a steel structure is important for its static design as well as for an assessment of its fatigue life. In the case of tower cranes, these loads are mainly caused by vibrations and load sway, which occurs as a result of the slewing motion of the jib around the vertical axis and from the radial movement of the loadćs suspension point. In this paper, only the slewing motion that produces the spatial motion of the pendulum is considered, because this kind of motion has received much less attention than the translation of the suspension point. In order to achieve this, a non-linear mathematical model of the load sway during the slewing motion was formulated, and the non-linear nature of the swinging motion for large angles and the non-linearity of the power transmission were considered. The structurećs elasticity and damping, the friction in the main bearing, and the air resistance were also taken into account. The dynamic forces acting on the steel structure of the crane during payload transport were obtained. In order to confirm the mathematical model, an actual model of a crane was built and used as the basis for measurements. A comparison of the results shows goodagreement between the predicted and the measured values.

Jezik:Angleški jezik
Ključne besede:steel structures, tower cranes, slewing motion, Lagrange equations, equation of motion, load sway, non-linear dynamical systems, measurements
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2004
Št. strani:str. 729-750
Številčenje:Vol. 46, no. 5
UDK:621.8:621.876
ISSN pri članku:0020-7403
COBISS.SI-ID:7494683 Povezava se odpre v novem oknu
Število ogledov:373
Število prenosov:244
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
Skupna ocena:(0 glasov)
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Gradivo je del revije

Naslov:International journal of mechanical sciences
Skrajšan naslov:Int. j. mech. sci.
Založnik:Pergamon Press
ISSN:0020-7403
COBISS.SI-ID:25648384 Novo okno

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