Impact of Multiple Operating Parameters Interactions on Load Swing of Tower Cranes

The mechanisms and interactive effects of multiple operating parameters of tower cranes on load swing are not yet clear, which leads to the exacerbation of load swing during the lifting process due to improper control parameter settings. To address this issue, this paper establishes an electromechanical rigid-flexible coupling (EMRFC) model for tower cranes to accurately simulate the characteristics of load swing caused by flexible transmission and electromechanical nonlinear coupling. Furthermore, the Sobol sensitivity method is used to screen out the dominant and interactive operating parameters affecting load swing, and to reveal the patterns of their impact on load swing. The results show that the stiffness of the flexible transmission system has a significant impact on the load swing, which cannot be neglected in modeling and analysis. Among the dominant operating parameters, the lifting height has the greatest effect on load swing. Lifting height, luffing speed, and slewing speed show significant interactions on load swing, and the interactions make a significant difference to the load swing in different operating phases. Finally, this paper gives the reasonable interval of operation parameters of a hoisting operation under the composite working condition, which provides a scientific basis and theoretical guidance for intelligent control of tower crane operation.