Numerical Calculation of Stresses in Helical Cable Elements subject to Cable Bending and Twisting

Abstract

Calculating the mechanical stresses in cable elements is essential for analyzing the cable's mechanical properties and fatigue properties. This paper derives numerical calculations of the stresses in helical cable elements for cables subject to bending-and twisting loads. The numerical calculations are compared to analytical approximations from the scientific literature. The former gives higher accuracy, and discloses behaviors and coupling effects that are not captured by the latter. These favorable properties combined with easy implementation, no risk of convergence issues, and very short CPU time, make the numerical calculations a very attractive alternative to the analytical approximations.

Experimental and Theoretical Study on the Prediction of Axial Stiffness of Subsea Power Cables

“…Vaz et al (1998), Coser et al (2016), Ekeberg and Dhaigude (2016), Komperød et al (2017), andDelizisis et al (2021) investigated mechanical properties such as tensile stiffness and bending stiffness through experiments with full-scale subsea cables. Furthermore, Witz and Tan (1992), Huang and Vassalos (1993), Kebadze (2000), Skeie et al (2012), andKomperød (2017) conducted studies on the analysis of the mechanical properties of subsea cables and prediction of the stress distribution in armor wires using numerical models, i.e., theoretical formulas. However, there has been limited research for verifying the validity of the proposed equations.…”