Original scientific paper

Consideration of a moving mass effect on dynamic behaviour of a jib crane structure

Vlada Gašić ; University of Belgrade, Faculty of Mechanical Engineering, Kraljice Marije 16, 11000 Beograd, Serbia
Nenad Zrnić orcid.org/0000-0002-0078-7275 ; University of Belgrade, Faculty of Mechanical Engineering, Kraljice Marije 16, 11000 Beograd, Serbia
Marko Rakin orcid.org/0000-0002-3965-0380 ; University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Beograd, Serbia

Abstract

This work examines the dynamics of a two-dimensional jib crane structure subjected to a moving trolley with hoist and payload. Dynamic responses of the structure, both in the vertical (Y) and horizontal direction (X), are calculated using the finite element method and the direct integration method. Instead of the conventional moving force problem, this paper deals with the two-dimensional inertial effects due to the masses of trolley, hoist and payload. For this purpose, the moving mass matrix has been used to give contribution to the overall mass matrix of the entire system. The title problem was solved by calculating the forced vibration responses of the jib crane structure with time-dependent overall mass while subjected to an equivalent moving force. Factors as magnitude, speed and acceleration of the moving trolley were studied as well. Numerical results reveal that the approach used herein is usefull and can be used to draw conclusions for the structural design purposes of jib cranes.

Keywords

dynamics of structures; finite element model; jib crane; moving mass

Hrčak ID:

79167

URI

https://hrcak.srce.hr/79167

Publication date:

29.3.2012.

Article data in other languages: croatian

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