Abstract
Nowadays, container shipment in the intermodal terminals is overloaded. The quay crane and its control system have to be properly prepared for rapid cargo reloading. The advanced control system may increase container loading efficiency due to the reduced transportation time. However, faster transportation demands higher safety. In this article, the authors performed multibody dynamics simulation of the container spreader and lifting mechanism by analyzing more advanced mathematical model of the quay crane. Trolley motion and cargo swing angle transient responses of the dynamic system were acquired and analyzed during model simulation. The main target of this research is to determine the system behavior during transients. The simulation results showed that the transients induced by startup of the vertical spreader travel affect the whole crane system in all the investigated cases. In addition, the influence of flexible cable causes additional oscillations of cargo and reciprocating trolley displacement. The simulation of the container spreader and lifting mechanism will help detect motion deviations of the quay crane in real time.
Highlights
Nowadays, container shipment in the intermodal terminals is overloaded
A multibody, more accurate mathematical model was designed to investigate the transients of the quay crane trolley and spreader on the quay crane system startup
The dynamics simulation was performed for the vertical crane spreader travel to imitate the container vertical motion and its influence for cargo sway and trolley displacements when the trolley motor is not running
Summary
Container shipment in the intermodal terminals is overloaded. The quay crane and its control system have to be properly prepared for rapid cargo reloading. Keywords Multibody dynamics, transients, simulation, mathematical modeling, quay crane The dynamic model of a quay crane container spreader and lifting mechanism is presented. Mathematical model and dynamics of container spreader transients
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