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| Structural Reliability Analysis of Deepwater Risers in Catastrophic Ocean Environment |
| CHEN Chang-Song, XUE Hong-Xiang, TANG Wen-Yong, HU Zhi-Qiang |
| (State Key Lab. of Ocean Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract A reliability analysis methodology for deep-water riser systems in catastrophic sea state was presented. Based on the advanced time domain couple analysis for deep-sea platforms and finite element dynamic response analysis for risers, the load probability model in catastrophic environment was conducted using generalized extreme value (GEV) theory. Based on structural reliability technique, the limitstate model was developed and the reliability and sensitivity analysis was performed. This methodology takes coupling effect of deep-sea platforms fully into account, which can provide a useful method for reliability assessment of deep-water risers in catastrophic sea state.
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Received: 09 March 2010
Published: 29 April 2011
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