NUK - logo
(UL)
  • An investigation of slewing-crane dynamics during slewing motion-developmentand verification of a mathematical model
    Jerman, Boris, strojnik, 1967- ; Podržaj, Primož ; Kramar, Janez, strojnik, 1940-
    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.
    Vir: International journal of mechanical sciences. - ISSN 0020-7403 (Vol. 46, no. 5, 2004, str. 729-750)
    Vrsta gradiva - članek, sestavni del
    Leto - 2004
    Jezik - angleški
    COBISS.SI-ID - 7494683

    Povezava(-e):

    http://www.sciencedirect.com/science/journal/00207403

    DOI: 10.1016/j.ijmecsci.2004.05.006

    Dostop do polnega teksta za člane



Vnos na polico