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Model Test to Evaluate Behavior of Tension Leg Platform in Waves

Razaghian, Amir Hosein | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45494 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Seif, Mohammad Saeid; Tabeshpour, Mohammad Reza
  7. Abstract:
  8. A Tension Leg Platform (TLP) can be difined as a vertically moored, buoyant and compliant platform, where the excess buoyancy of the platform maintains tension in the mooring system (tethers). This platform type is usually used for drilling in deep water and includes the following sections, foundation, tendons, risers, hull and deck which is the most important section in terms of hydrodynamic forces and weight. Enough initial tension can be used to inhibit vertical movement of the structure. one of The main properties of this oil platform is extraction at large oil fields. Body of TLP is consist of vertical column, horizontal circular or rectangular cross section Pantoons and circular profile tendons. In recent TLP designed to increase the stability and strength, use of columns with circular cross section and internal longitudinal reinforcements has been expanded.
    In this thesis the effective parameters on experimental modeling of Tension Leg Platform will be discussed. The geometry modeling process of ISSC TLP based on experimental conditions of test basin in Sharif University of Technology to provide deep water condition will be analysed. Numerical modeling of ISSC TLP platform has been carried out by Moses software and the obtained results are verified by experimental ones. Among the results obtained in this thesis, numerical response amplitude operator Graphs of 6 degrees of freedom in different wave angles has been verified by experiments and transient effect of tendon disconnection in global performance of ISSC TLP investigated
  9. Keywords:
  10. Tension Leg Platform ; Regular Waves ; Model Test ; Mooring Lines Force

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