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| Sensitivity Analyses for Time-Domain Fatigue Life of Umbilical Bending Stiffener |
| WANG Ai-Jun, YANG He-Zhen |
| (State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract Nonlinear characteristic of bending stiffener made from polymer is obvious and traditional fatigue analysis method in frequency domain is not applicable. Fatigue strength is the crucial and difficult aspect of bending stiffener design. Mathematical model for bending stiffener analysis was established, and fatigue analysis method of bending stiffener based on mathematical model was introduced. Fatigue analysis in time domain employs the thought from global analysis to local analysis. Then sensitivity analysis was performed to study the effects of different parameters on fatigue life of bending stiffener, and the effects of different parameters were discussed. The method proposed in this work and the conclusions can be the guide for bending stiffener of deepwater umbilical design.
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Received: 09 February 2012
Published: 30 October 2012
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