Fatigue Generation Mechanism in Touchdown Area of Steel Catenary Risers in Non-Linear Hysteretic Seabed

摘要

The complex nature of seabed interaction with Steel Catenary Risers (SCR) in Touch Down Zone (TDZ) and its vital impact on fatigue performance of SCRs makes serious difficulties against proposing simplified and robust solutions for engineering design industry where the fatigue in touch down zone is still considered as one the most challenging issues in riser design, hi this study, authors have tried to explore in deep the mechanism of fatigue generation in touchdown area with sophisticated numerical simulations capturing the stress variation along the riser under complex load conditions in non-linear hysteretic seabed. The results show interesting unknown stress variation trends which is believed to be considerably useful in providing robust and simple solution for design industry.