Simulating High Mode Vortex Induced Vibration of Riser in Linear Sheared Current Using an Empirical Time Domain Model

2021 ◽  
Author(s):  
Sangwoo Kim ◽  
Svein S\xe6vik ◽  
Jie Wu
Keyword(s):  
Time Domain ◽  
Domain Model ◽  
High Mode ◽  
Vortex Induced Vibration

Simulating High Mode Vortex Induced Vibration of a Riser in Linearly Sheared Current using an Empirical Time domain Model

2020 ◽  
pp. 1-15
Author(s):  
Sang Woo Kim ◽  
Svein Sævik ◽  
Jie Wu ◽  
Bernt J. Leira
Keyword(s):  
Time Domain ◽  
Deep Sea ◽  
Oil And Gas ◽  
Response Prediction ◽  
Domain Model ◽  
High Mode ◽  
Vortex Induced Vibration ◽  
Use Of Time ◽  
Offshore Oil And Gas ◽  
The Time Domain

Abstract As the development of offshore oil and gas continues to move into deeper waters, the risers connecting the seabed infrastructure to the offshore platform are getting longer. This means that Vortex-induced vibration (VIV) may occur at different frequencies along the riser due to current variation, making the VIV prediction challenging. To increase the VIV prediction accuracy, an empirical time domain VIV model has been developed. The advantage of the model is that it can account for structural non-linearities such as variable tension and time-varying flow. The robustness of the time domain VIV model has been verified with respect to the several tests, but the length/diameter (L/D) ratio of the risers used in the experiments has so far been relatively small, and the response mode number accordingly low. Therefore, additional validation is needed to understand the uncertainties for the prediction of VIV for deep-sea riser systems at high mode order. The purpose of the present study was to evaluate the use of time domain model for high mode VIV response prediction of deep-sea riser systems. This was done by a comparison study applying the Hanøytangen high mode VIV test data. The main comparison was made regarding the dominating frequency and fatigue damage estimation. For selected empirical parameters, the model demonstrated a good correlation with the experiments. However, the simplified riser model which was utilized in the simulations caused some discrepancies between numerical simulations and the experimental results, which needs to be further investigated.

scholarly journals Prediction of deepwater riser VIV with an improved time domain model including non-linear structural behavior

2021 ◽  
Vol 236 ◽  
pp. 109508
Author(s):  
Sang Woo Kim ◽  
Svein Sævik ◽  
Jie Wu ◽  
Bernt Johan Leira
Keyword(s):  
Time Domain ◽  
Domain Model ◽  
Structural Behavior ◽  
Non Linear ◽  
Deepwater Riser

scholarly journals Time domain model for calculation of pure in-line vortex-induced vibrations

2017 ◽  
Vol 68 ◽  
pp. 158-173 ◽  
Author(s):  
J.V. Ulveseter ◽  
S. Sævik ◽  
C.M. Larsen
Keyword(s):  
Time Domain ◽  
Domain Model ◽  
Line Vortex ◽  
Vortex Induced Vibrations
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