Structural analysis of a rope slewing system for loads with a variable center of gravity

Adjustable sling cranes are specialized lifting systems equipped with adaptable sling mechanisms that enhance operational flexibility and efficiency. These systems are particularly advantageous in construction and industrial applications, where adjustable sling tension significantly affects weight distribution and safety. This study presents the design and structural analysis of a rope slewing system for loads with a variable center of gravity. First, the upper and lower lifting groups were designed, and profiles with fixing points according to the load position were mounted on the rails. A sling apparatus was used between the upper and lower groups. For structural analyses, boundary conditions and material properties were defined according to the loads to be carried in the system. Inclined conditions that may occur during transportation were taken into account in the analyses. Loading was performed under transportation conditions with a maximum inclination of 6° and accordingly, the safety of the system according to the material types was observed. According to the Finite Element Analysis (FEA) results, the maximum stress values were obtained as 267.5 MPa in the upper carrying group, 113.4 MPa in the lower carrying group and 66.1 MPa in the sling apparatus. As a result, the structural analyses performed show that the design and material selections of the rope slewing system remained within safe limits during operation. Considering loading conditions and inclined positions, the system’s safety and efficiency demonstrate that it provides a practical and safe solution for industrial applications.