skip to main content

The TLP 2-DOF as an alternative model for extreme wave application

*Jamiatul Akmal orcid scopus  -  Department of Mechanical Engineering, Universitas Lampung, Indonesia
Asnawi Lubis scopus  -  Department of Mechanical Engineering, Universitas Lampung, Indonesia
Novri Tanti scopus  -  Department of Mechanical Engineering, Universitas Lampung, Indonesia
Nuryanto Nuryanto  -  Department of Mechnical Engineering, Universitas Lampung, Indonesia
Adam Wisnu Murti  -  Department of Mechanical Engineering, Universitas Lampung, Indonesia

Citation Format:
Cover Image
Abstract

Tension Leg Platform (TLP) is an offshore platform structure used for deep-sea oil and gas exploration. The main structure of the TLP consists of a deck, pontoon, mooring system, and foundation. TLP operates in a balance of buoyancy, structural weight, and mooring tension. The problem is the construction of TLP in the deep sea, where sometimes extreme waves appear could damage the TLP structure. This paper proposes a new model of TLP that is more stable to extreme waves. The method is to separate the mass of the deck and the mass of the pontoon into two flexible parts, which are connected by a cantilever spring system. Thus the TLP motion becomes two degrees of freedom (TLP 2-DOF). Using the dynamic vibration absorber (DVA) method, the ratio of the deck mass, pontoon mass, and spring stiffness are adjusted so that the primary mass movement is minimal. Furthermore, the ratio of the amplitude of the deck movement as the primary mass to the wave amplitude is analyzed, which is known as the operator response amplitude (RAO). The results showed that the TLP 2-DOF model was more stable. As an illustration, at resonance conditions, this model can reduce RAO to about 67%.

Fulltext View|Download
Keywords: TLP; 2-DOF system; Dynamic Vibration Absorber; Optimization; RAO

Article Metrics:

Article Info
Section: Research Articles
Language : EN
Statistics:
  1. I. Senjanović, M. Tomić, and S. Rudan, "Investigation of nonlinear restoring stiffness in dynamic analysis of tension leg platforms," Engineering Structure, vol. 56, pp. 117–125, 2013. doi: /10.1016/j.engstruct.2013.04.020
  2. X. Song, S. Wang, H. Li, and T. Li, "Investigation of the Hydrodynamic Performance of a Novel Semi-Submersible Platform with Multiple Small Columns," Journal Ocean University China, vol. 18, no. 1, pp. 108–122, 2019. doi: org/10.1007/s11802-019-3679-y
  3. M. Rudman and P. W. Cleary, "Rogue wave impact on a tension leg platform: The effect of wave incidence angle and mooring line tension," Ocean Engineering, vol. 61, pp. 123–138, Mar. 2013, doi: 10.1016/j.oceaneng.2013.01.006
  4. M. Lou, C. Yu, and P. Chen, "Dynamic response of a riser under excitation of internal waves," Journal Ocean University China, vol. 14, no. 6, pp. 982–988, Dec. 2015, doi: 10.1007/s11802-015-2701-2
  5. M. R. Tabeshpour, A. Ahmadi, and E. Malayjerdi, "Investigation of TLP behavior under tendon damage," Ocean Engineering, vol. 156, pp. 580–595, May 2018, doi: 10.1016/j.oceaneng.2018.03.019
  6. J. Yu, S. Hao, Y. Yu, B. Chen, S. Cheng, and J. Wu, "Mooring analysis for a whole TLP with TTRs under tendon one-time failure and progressive failure," Ocean Engineering, vol. 182, pp. 360–385, Jun. 2019, doi: 10.1016/j.oceaneng.2019.04.049
  7. N. Abdussamie, Y. Drobyshevski, R. Ojeda, G. Thomas, and W. Amin, "Experimental investigation of wave-in-deck impact events on a TLP model," Ocean Engineering, vol. 142, pp. 541–562, 2017. doi: 10.1016/j.oceaneng.2017.07.037
  8. S. Chandrasekaran and K. Yuvraj, "Dynamic analysis of a tension leg platform under extreme waves," Journal Naval Architecture Marine Engineering, vol. 10, no. 1, pp. 59–68, Jun. 2013, doi: 10.3329/jname.v10i1.14518
  9. S. Chandrasekaran and A. K. Jain, "Triangular configuration tension leg platform behavior under random sea wave loads," Ocean Engineering, vol. 29, no. 15, pp. 1895–1928, 2002. doi: 10.1016/S0029-8018(01)00111-1
  10. S. Chandrasekaran, D. Kumar, and R. Ramanathan, "Dynamic response of tension leg platform with tuned mass dampers," Journal Naval Architecture Marine Engineering, vol. 10, no. 2, pp. 149–156, 2013. doi: 10.3329/jname.v10i2.16184
  11. D. Qiao, B. Li, and J. Ou, "Use of different mooring models on global response analysis of an innovative deep draft platform," Journal Ocean University China, vol. 13, no. 2, pp. 215–222, 2014. doi: 10.1007/s11802-014-2012-z
  12. H. H. Lee and P.-W. Wang, "Analytical solution on the surge motion of tension-leg twin platform structural systems," Ocean Engineering, vol. 27, no. 4, pp. 393–415, 2000. doi: 10.1016/S0029-8018(98)00047-X
  13. Y.-M. Choi, B. W. Nam, S. Y. Hong, D. W. Jung, and H. J. Kim, "Coupled motion analysis of a tension leg platform with a tender semi-submersible system," Ocean Engineering, vol. 156, pp. 224–239, 2018. doi: 10.1016/j.oceaneng.2018.01.031
  14. P. Su, J. Wu, S. Liu, and J. Jiang, "Study on the dynamics of the two-degree-of-freedom system with variable stiffness magnetic isolator," Journal Vibroengineering, vol. 20, no. 1, pp. 116–126, 2018, doi: 10.21595/jve.2017.18847
  15. V. Piccirillo, A. M. Tusset, and J. M. Balthazar, "Optimization Of Dynamic Vibration Absorbers Based On Equal-Peak Theory," Latin American Journal Solids and Structure, vol. 16, no. 4, p. e184, 2019, doi: 10.1590/1679-78255285
  16. Y. Shen, X. Wang, S. Yang, and H. Xing, "Parameters Optimization for a Kind of Dynamic Vibration Absorber with Negative Stiffness," Mathematical Problems in Engineering, vol. 2016, pp. 1–10, 2016, doi: 10.1155/2016/9624325
  17. B. Utomo and M. Iqbal, “Vertical Motion Optimization of Series 60 Hull Forms Using Response Surface Methods,” Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan, vol. 17, no. 3, pp. 130–137, Oct. 2020, doi: 10.14710/kapal.v17i3.33212
  18. H. G. Harno, "On the Synthesis of a Linear Quadratic Controller for a Quadcopter," International Journal of Applied Sciences and Smart Technologies, vol. 01, no. 02, pp. 101–112, 2019, doi: 10.24071/ijasst.v1i2.1919

Last update:

No citation recorded.

Last update:

No citation recorded.