Dynamic responses of a gantry crane structure due to an accelerating moving mass

Abstract

The dynamics of a two-dimensional gantry crane structure subjected to a moving trolley with hoist and payload is examined. Dynamic responses of structure, both in vertical (Y) and horizontal direction (X), are postulated using the combined finite element and analytical method and solved with the direct integration method. Instead of conventional moving force problem, the two-dimensional inertial effects due to the overall mass of trolley, hoist and payload have been considered in this paper. The title problem was solved by calculating the forced vibration responses of the jib crane structure with time-dependent overall mass and subjected to an equivalent moving force. Factors as speed and acceleration of the moving trolley were studied. Numerical results reveal that used approach is useful and can draw conclusions for structural design purposes of gantry cranes and approaches for creation of dynamic models.