[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.26748/KSOE.2022.012

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

Nam, Woongshik (Construction & Engineering Research Center, LS Cable & System)
Chae, Kwangsu (Platform Technology Research Center, LS Cable & System)
Lim, Youngseok (Construction & Engineering Research Center, LS Cable & System)

Publication Information

Journal of Ocean Engineering and Technology / v.36, no.4, 2022 , pp. 243-250 More about this Journal

Abstract

Subsea power cables are subjected to various external loads induced by environmental and mechanical factors during manufacturing, shipping, and installation. Therefore, the prediction of the structural strength is essential. In this study, experimental and theoretical analyses were performed to investigate the axial stiffness of subsea power cables. A uniaxial tensile test of a 6.5 m three-core AC inter-array subsea power cable was carried out using a 10 MN hydraulic actuator. In addition, the resultant force was measured as a function of displacement. The theoretical model proposed by Witz and Tan (1992) was used to numerically predict the axial stiffness of the specimen. The Newton-Raphson method was employed to solve the governing equation in the theoretical analysis. A comparison of the experimental and theoretical results for axial stiffness revealed satisfactory agreement. In addition, the predicted axial stiffness was linear notwithstanding the nonlinear geometry of the subsea power cable or the nonlinearity of the governing equation. The feasibility of both experimental and theoretical framework for predicting the axial stiffness of subsea power cables was validated. Nevertheless, the need for further numerical study using the finite element method to validate the framework is acknowledged.

Keywords

Subsea power cables; Experimental analysis; Theoretical analysis; Axial stiffness; Helical elements;

Citations & Related Records

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