한국해양공학회지 (Journal of Ocean Engineering and Technology)

  • 제36권4호
  • /
  • Pages.243-250
  • /
  • 2022
  • /
  • 1225-0767(pISSN)
  • /
  • 2287-6715(eISSN)
한국해양공학회 (Korean Society of Ocean Engineers)
권호 표지
DOI QR코드

DOI QR Code

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)
  • 투고 : 2022.05.16
  • 심사 : 2022.06.17
  • 발행 : 2022.08.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

참고문헌

  1. CIGRE. (2015). Recommendations for Mechanical Testing of Submarine Cables (CIGRE TB 623).
  2. Chang, H.-C., & Chen, B.-F. (2019). Mechanical Behavior of Submarine Cable under Coupled Tension, Torsion and Compressive Loads. Ocean Engineering, 189, 106272. https://doi.org/10.1016/j.oceaneng.2019.106272
  3. Coser, T.B., Strohaecker, T.R., Lopez, F.S., Bertoni, F., Wang, H., Hebert, C.B., ... Maioli, P. (2016). Submarine Power Cable Bending Stiffness Testing Methodology. In the 26th International Ocean and Polar Engineering Conference. OnePetro.
  4. Delizisis, P., Dolianitis, I., Chatzipetros, D., Kanas, V., Georgallis, G., Tastavridis, K., ... Angelis, E., (2021). Full Scale Axial, Bending and Torsion Stiffness Tests of a Three Core HVAC Submarine Cable. Proceedings of International Conference on Offshore Mechanics and Arctic Engineering, V004T04A009, American Society of Mechanical Engineers. https://doi.org/10.1115/OMAE2021-63238
  5. Ekeberg, K.I., & Dhaigude, M.M. (2016). Validation of the Loxodromic Bending Assumption using High-quality Stress Measurements. In The 26th International Ocean and Polar Engineering Conference. OnePetro.
  6. Huang, S., & Vassalos, D. (1993). A Numerical Method for Predicting Snap Loading of Marine Cables. Applied Ocean Research, 15(4), 235-242. https://doi.org/10.1016/0141-1187(93)90012-M
  7. Kebadze, E. (2000). Theoretical Modelling of Unbonded Flexible Pipe Cross-sections.
  8. Knapp, R.H. (1979). Derivation of a New Stiffness Matrix for Helically Armoured Cables Considering Tension and Torsion. International Journal for Numerical Methods in Engineering, 14(14), 515-529. https://doi.org/10.1002/nme.1620140405
  9. Komperod, M. (2017). Numerical Calculation of Stresses in Helical Cable Elements Subject to Cable Bending and Twisting. Proceedings of the 58th Conference on Simulation and Modelling (SIMS 58) Reykjavik, Iceland, Linkoping University Electronic Press, 374-384. https://doi.org/10.3384/ecp17138374
  10. Komperod, M., Juvik, J.I., Evenset, G., Slora, R., & Jordal, L. (2017). Large-Scale Tests for Identifying the Nonlinear, Temperature-Sensitive, and Frequency-Sensitive Bending Stiffness of the NordLink Cable. In International Conference on Offshore Mechanics and Arctic Engineering, V05AT04A004, American Society of Mechanical Engineers. https://doi.org/10.1115/OMAE2017-61103
  11. Love, A.E.H. (2013). A Treatise on the Mathematical Theory of Elasticity. Cambridge University Press.
  12. Lu, Q., Yang, Z., Yan, J., Lu, H., Chen, J., & Yue, Q., 2017. A Finite Element Model for Prediction of the Bending Stress of Umbilicals. Journal of Offshore Mechanics and Arctic Engineering, 139(6), 061302. https://doi.org/10.1115/1.4037065
  13. Lutchansky, M. (1969). Axial Stresses in Armor wiress of Bent Submarine Cables. Journal of Manufacturing Science and Engineering,91(3), 687-691. https://doi.org/10.1115/1.3591660
  14. Shaw, N. (2011). Cross-section Design and Analysis of Umbilical Cable in Subsea Production System (Master Thesis).
  15. Skeie, G., Sodahl, N., & Steinkjer, O. (2012). Efficient Fatigue Analysis of Helix Elements in Umbilicals and Flexible Risers: Theory and applications. Journal of Applied Mathematics. 246812. https://doi.org/10.1155/2012/246812
  16. Tjahjanto, D.D., Tyrberg, A., & Mullins, J. (2017). Bending Mechanics of Cable Cores and Fillers in a Dynamic Submarine Cable. In International Conference on Offshore Mechanics and Arctic Engineering, V05AT04A038, American Society of Mechanical Engineers, V05AT04A038. https://doi.org/10.1115/OMAE2017-62553
  17. Vaz, M.A., Aguiar, L.A.D., Estefen, S.F., & Brack, M. (1998). Experimental Determination of Axial, Torsional and Bending Stiffness of Umbilical Cables. Proceedings of the 17th International Offshore & Arctic Engineering Conference (OMAE'98), 7.
  18. Witz, J.A., & Tan, Z. (1992). On the Axial-torsional Structural Behaviour of Flexible Pipes, Umbilicals and Marine Cables. Marine Structures, 5(2-3), 205-227. https://doi.org/10.1016/0951-8339(92)90029-O