El-gamal, A., Essa, A., Ismail, A. (2014). Influence of Tethers Tension Force on the response of Triangular Tension Leg Platform subjected to hydrodynamic waves. test, 10(10th International Conference on Civil and Architecture Engineering), 1-8. doi: 10.21608/iccae.2014.44203
Amr R. El-gamal; Ashraf Essa; Ayman Ismail. "Influence of Tethers Tension Force on the response of Triangular Tension Leg Platform subjected to hydrodynamic waves". test, 10, 10th International Conference on Civil and Architecture Engineering, 2014, 1-8. doi: 10.21608/iccae.2014.44203
El-gamal, A., Essa, A., Ismail, A. (2014). 'Influence of Tethers Tension Force on the response of Triangular Tension Leg Platform subjected to hydrodynamic waves', test, 10(10th International Conference on Civil and Architecture Engineering), pp. 1-8. doi: 10.21608/iccae.2014.44203
El-gamal, A., Essa, A., Ismail, A. Influence of Tethers Tension Force on the response of Triangular Tension Leg Platform subjected to hydrodynamic waves. test, 2014; 10(10th International Conference on Civil and Architecture Engineering): 1-8. doi: 10.21608/iccae.2014.44203

Influence of Tethers Tension Force on the response of Triangular Tension Leg Platform subjected to hydrodynamic waves

The International Conference on Civil and Architecture Engineering
Article 36, Volume 10, 10th International Conference on Civil and Architecture Engineering, May 2014, Pages 1-8    PDF (374.03 K)
Document Type: Original Article
DOI: 10.21608/iccae.2014.44203
Authors
Amr R. El-gamal1; Ashraf Essa2; Ayman Ismail3
1A. R. is with the Civil Engineering Department, Faculty of Engineering at Benha, Benha University, Assistant Lecturer, Egypt (phone: 002- 01000941720; fax: 13512.
2A. E. is with the Civil Engineering Department, National Building Research Center, Associated prof., Egypt (phone: 00201143043638; fax: 1770.
3A. I. is with the Steel and Structure Engineering Department, National Building Research Center, Egypt (phone: 00201143043638; fax: 1770.
Abstract
Abstract— compliant structures like triangular tension leg platforms (TLPs) are proven to be highly cost effective in deep waters. The estimation of hydraulic forces due to waves on structural member of TLP is vital for its economic and safe design. In the current study, a numerical study for a triangular TLP using modified Morison equation was carried out in the time domain with water particle kinematics using Airy’s linear wave theory to investigate the effect of changing the tether tension force on the stiffness matrix of TLP's, the dynamic behavior of TLP's; and on the fatigue stresses in the cables. The effect was investigated for different parameters of the hydrodynamic forces such as wave periods, and wave heights. The numerical study takes into consideration the effect of coupling between various degrees of freedom. The stiffness of the TLP was derived from a combination of hydrostatic restoring forces and restoring forces due to cables. Nonlinear equation was solved using Newmark’s beta integration method. Only uni-directional waves in the surge direction was considered in the analysis.
Keywords
Tethers tension; triangular tension leg platforms; hydrodynamic wave forces; wave characteristic
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