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Vortex-Induced Vibration Analysis of Deep-Sea Riser

심해 라이저의 와류유기 진동해석

  • Park, Seongjong (Central Research Institute, Samsung Heavy Industry) ;
  • Kim, Bongjae (Central Research Institute, Samsung Heavy Industry)
  • 박성종 (삼성중공업(주) 중앙연구소) ;
  • 김봉재 (삼성중공업(주) 중앙연구소)
  • Received : 2017.06.27
  • Accepted : 2017.10.19
  • Published : 2017.10.31

Abstract

A numerical model based on the mode superposition method is used to study the vortex-induced vibration response characteristics of a deep-sea riser such as steel catenary riser (SCR). A steel catenary riser can be modeled using a flexible cable with simple supports at both ends. The natural frequency, mode shape and mode curvature of the riser are calculated and the vortex-induced vibration response of the riser is obtained using the equilibrium of the input and output power. The mode superposition method is applied to the vibrational stresses for each mode to calculate the overall riser fatigue life.

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