Abstract

In recent years, the main areas of oil and gas production in the ocean have been expanded to sea level deeper than 500 meters. A tension leg platform (TLP) is one of the representative offshore structures that has excellent work performance even in rough seas. Since the tension leg platform is required to perform work in extreme marine conditions, precise motion analysis is required to ensure the stability and continuous operation of the structure. The Stokes wave representing the sea waves is expressed as a superposition of linear waves. The fifth-order Stokes waves are expressed as a superposition of five linear waves. Therefore, the motion responses of the tension leg platform in Stokes waves would be expressed as a superposition of the motion responses in each linear waves. In this paper, We evaluate and compare behaviors of tension leg platform in the fifth-order Stokes waves and in linear waves with the same wave height.

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