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

Year 2025, Volume: 9 Issue: 1, 78 - 86, 20.03.2025

Sinan Düzenli , Tolga Güney , Mücahit Soyaslan

https://doi.org/10.26701/ems.1629942

Abstract

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.

Keywords

Sling cranes, Lifting systems, Finite Element Analysis, Mechanical design

Ethical Statement

This research was conducted in strict accordance with ethical standards. No human participants or animal subjects were involved in the study, and thus no ethical approval was required.

References

• Li, K., Liu, M., Yu, Z., Peng, L., & Liu, N. (2022). Multibody system dynamic analysis and payload swing control of tower crane. Proceedings of the Institution of Mechanical Engineers Part K Journal of Multi-Body Dynamics, 236(3), 407-421. https://doi.org/10.1177/14644193221101994
• Wada, M., Mori, Y., & Tagawa, Y. (2020). Development of a suspended-load rotation-control device for cranes with gyroscopic damper and control by wind force (concept, modeling and experiments). Mechanical Engineering Journal, 7(5), 20-00268-20-00268. https://doi.org/10.1299/mej.20-00268
• Vasiljević, R., Gašić, M., & Savković, M. (2016). Parameters influencing the dynamic behaviour of the carrying structure of a type h portal crane. Strojniški Vestnik – Journal of Mechanical Engineering, 62(10), 291-602. https://doi.org/10.5545/sv-jme.2016.3553
• Onur, Y. (2017). Investigation of the effect of the sling angle and size on the reliability of lifting hooks. Simulation, 94(10), 931-942. https://doi.org/10.1177/0037549717744646
• Devaraj A. (2015). Design of a crane hook of different materials and stress analysis using ANSYS workbench. Int J Res App Sci Eng Tech, 3: 310–314.
• Krishnaveni MNV, Reddy M, Rajaroy M. (2015). Static analysis of crane hook with t-section using ANSYS. Int J Eng Trends Tech, 25: 53–58.
• Onur, Y. (2018). Computer aided lifting hook modeling and stress analysis. Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 11(2), 231-236. https://doi.org/10.18185/erzifbed.371751
• Sanches, L. V., Goulart, C. A., Bustos MacLean, P. A., & Villas-Boas, L. A. (2024). Mechanical analysis and materials selection of a scissor lift system for pig transportation. Acta Scientiarum Technology, 46(1). https://doi.org/10.4025/actascitechnol.v46i1.65406
• Sydora, C., Lei, Z., Siu, M., Han, S., & Hermann, U. (2020). Critical lifting simulation of heavy industrial construction in gaming environment. Facilities, 39(1/2), 113-131. https://doi.org/10.1108/f-08-2019-0088
• Li, W. (2023). Optimization of hoisting attitude in non-standard steel structures via adjustable counterweight balance beam technology. J. Civ. Hydraul. Eng, 1(1), 11-22. https://doi.org/10.56578/jche010102
• Jiang, J. (2024). A train f-tr lock anti-lifting detection method based on improved bp neural network. Journal of Measurements in Engineering, 12(1), 149-161. https://doi.org/10.21595/jme.2023.23638
• Jin, X., & Xu, W. (2024). Finite-time model-free robust synchronous control of multi-lift overhead cranes based on iterative learning. Transactions of the Institute of Measurement and Control, 46(13), 2570-2584. https://doi.org/10.1177/01423312241231282
• Ouyang, Z., Zhang, M., & Zeng, W. (2024). Lifting platform pwm control system design combining distance detection. Journal of Physics Conference Series, 2787(1), 012017. https://doi.org/10.1088/1742-6596/2787/1/012017
• Kozkurt, C., Fenercioglu, A., & Soyaslan, M. (2012). Structural Analysis of Warehouse Rack Construction for Heavy Loads. International Journal of Civil and Environmental Engineering, 6(7), 414-418.