PSI - Issue 75

Jeroen Van Wittenberghe et al. / Procedia Structural Integrity 75 (2025) 111–119 Jeroen VAN WITTENBERGHE and Vitor ADRIANO / Structural Integrity Procedia (2025)

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Figure 10: Measured frequency of the dynamic oscillations.

Conclusions In this study the results of a digital twin based structural health monitoring system are presented. The system calculates fatigue damage of each weld of the crane based on time series data and continuously updates the accumulated fatigue damage. Design calculations are typically performed using load histograms with simplified definitions of a lifting operation. It is shown that even basic differences in crane operations can have a significant influence on the fatigue damage of one lift. With actual measured data, fatigue damage can be more accurately calculated and remaining lifetime can be assessed with increased confidence. With this, the SHM system is able to identify the welds of the crane structure that suffer most fatigue damage. The significance of dynamic effects on crane operations is highlighted. Unlike in design standards, it is better to derive dynamic effects from measurements instead of using a fixed dynamic factor. Higher dynamic factors at increased lifting heights and speeds highlight the need for precise lifetime calculations. Oscillations frequency measurements confirm the crane's behaviour as a mass-spring system, with higher stiffness leading to elevated frequencies. Comprehensive understanding of the crane's performance and fatigue life, ensures operational safety and longevity. Acknowledgements The authors would like to acknowledge the support of the technicians at OCAS for the assistance during the measurement campaign on Crane-OCAS. Special thanks go to Hugo Guillou for the practical preparations and processing of the measurement data during his internship. References [1]. Lecouturier B., Ugitech : après six mois d'arrêt, un nouveau départ, www.la-vie-nouvelle.fr [2]. Van Wittenberghe, J., Adriano, V., Yilmaz, O., Van Den Abeele, F., Increasing the Reliability of Industrial Overhead Cranes by Structural Health Monitoring, Procedia Structural Integrity, Volume 57, 2024, Pages 95-103, https://doi.org/10.1016/j.prostr.2024.03.012. [3]. DNVGL-CG-0127, Class Guideline Finite Element Analysis (2015) [4]. EN 13001-3-1, Limit States and proof competence of steel structure, (2019) [5]. EN 1991-3, Actions induced by cranes and machinery, (1991) [6]. FEM 1.001, “Rules for the Design of Hoisting Appliances”, 1998, European Materials Handling Federation. [7]. Gąska, D., Margielewicz, J., Haniszewski, T., Matyja, T., Konieczny, L., Chróst, P., Numerical identification of the overhead travelling crane’s dynamic factor caused by lifting the load off the ground, Journal of Measurements in Engineering, 2015.