Investigating of clamp effects on fatigue damage in the fixed platforms riser

The riser is one of the components of offshore platforms, which consists of a thin cylinder that is vertically connected to the deck of the platform from one side and the other side is connected to the seabed and delivering oil and gas to the platform. Marine risers are exposed to many environmental forces, which cause vibrational oscillation of riser in different directions so-called conventional vortex-induced vibration and thus causing fatigue damage and reducing the riser’s life. In this study, the riser platforms jacket was controlled in different class levels to reduce the risk of fatigue exacerbation using supportive systems known as clamp and part of the platform components. Finally, life expectancy of riser pipes against the fatigue was estimated for a case study.