Extreme response study of top tensioned riser under internal solitary wave in the South China Sea
ZHANG Li，GUO Hai-yan，LI Xiao-min
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College of Engineering, Ocean University of China，Qingdao 266100，China
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History+
Received
Revised
Published
2012-02-06
2012-07-05
2013-05-25
Issue Date
2013-05-25
Abstract
The internal solitary wave, which brings in strong shear current and powerful impact, can pose a hazard to ocean engineering structures like offshore platforms and marine risers. However, there are few studies about the responses of marine risers under internal solitary wave. An investigation on the extreme response of top tensioned riser under internal solitary wave is presented in this paper. To describe the flow field induced by internal solitary wave, the KdV-mKdV equation was employed. The modified Morison formula was chosen to calculate the hydrodynamic force, and the Finite Element Method was adopted to estimate the extreme response of top tensioned riser under internal solitary wave in time domain. The influences of the internal wave amplitude, internal flow, top tension, elastic modulus and wall thickness on the riser extreme response were discussed. The results show that internal solitary wave may induce quite large displacement and stress in riser, and the load of internal solitary wave should be concerned in riser analysis.
ZHANG Li;GUO Hai-yan;LI Xiao-min.
Extreme response study of top tensioned riser under internal solitary wave in the South China Sea[J]. Journal of Vibration and Shock, 2013, 32(10): 100-104
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