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| Dynamic Response Analysis of a Jumper in Subsea Production Facility Under Earthquake |
| LAI Wen-Long, TANG Wen-Yong, XUE Hong-Xiang |
| State Key Laboratory of Ocean Engineering，Shanghai Jiao Tong Univ.，Shanghai 200240，China |
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Abstract Dynamic responses of a jumper in subsea production facility under earthquake are analyzed. Seismic waves are input into subsea jumper in both horizontal and vertical direction, the nonlinear springs are used to simulate the soil- jumper interaction, and hydrodynamic forces due to earthquake are considered. Different models are analyzed and compared. It shows that vertical earthquake has more magnificent effect on the horizontal frequency of jumper dynamic response than the magnitude, the soil- jumper interaction increases the magnitude and stimulates higher modals, hydrodynamic forces have great influence on magnitude. In conclusion, the proposed approach provides strategy to the subsea jumper design and safety assessment.
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Received: 22 December 2011
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2013, Vol. 32 
