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This study presents a numerical fatigue analysis of three riser configurations, Shaped Steel Lazy Wave Riser (SSLWR), Steel Lazy Wave Riser (SLWR), and Steel Catenary Riser (SCR), for ultra deepwater applications. Also, the effectiveness of SSLWR compared to SCR and SLWR under different environmental loading conditions was evaluated. The analysis was performed using OrcaFlex, a 3D nonlinear finite element software to determine and compare the fatigue life of the three riser configurations under different environmental conditions. The performance of these risers at the hang-off point (HOP) and touchdown zone (TDZ) across five depth cases ranging from 914 to 3000 m was analyzed. SSLWR consistently outperforms SCR and SLWR at the HOP, with fatigue life of up to 796.98 years at 3000 m, compared to SLWR’s 46.67 years and SCR’s 0.78 years. However, at the TDZ, SSLWR showed significant variability, with a dramatic decrease in fatigue life when horizontal distances were increased.

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Numerical Fatigue Analysis of a Shaped Steel Lazy Wave Riser Configuration for Ultra Deepwater

  • 会议论文

  • 发表日期：

    2026年

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  • Haneefan Mirza bin Abd Haris,
  • Suria Devi Vijaya Kumar,
  • Saravanan Karuppanan,
  • Veeradasan Perumal,
  • Mark Ovinis,
  • Chen Haoran,
  • Frank Lim

摘要

This study presents a numerical fatigue analysis of three riser configurations, Shaped Steel Lazy Wave Riser (SSLWR), Steel Lazy Wave Riser (SLWR), and Steel Catenary Riser (SCR), for ultra deepwater applications. Also, the effectiveness of SSLWR compared to SCR and SLWR under different environmental loading conditions was evaluated. The analysis was performed using OrcaFlex, a 3D nonlinear finite element software to determine and compare the fatigue life of the three riser configurations under different environmental conditions. The performance of these risers at the hang-off point (HOP) and touchdown zone (TDZ) across five depth cases ranging from 914 to 3000 m was analyzed. SSLWR consistently outperforms SCR and SLWR at the HOP, with fatigue life of up to 796.98 years at 3000 m, compared to SLWR’s 46.67 years and SCR’s 0.78 years. However, at the TDZ, SSLWR showed significant variability, with a dramatic decrease in fatigue life when horizontal distances were increased.