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http://dx.doi.org/10.1016/j.ijnaoe.2017.10.012

Preliminary optimal configuration on free standing hybrid riser  

Kim, Kyoung-Su (Graduate School of Engineering Mastership, POSTECH)
Choi, Han-Suk (Graduate School of Engineering Mastership, POSTECH)
Kim, Kyung Sung (Department of Naval Architecture and Ocean Engineering, Tongmyong University)
Publication Information
International Journal of Naval Architecture and Ocean Engineering / v.10, no.3, 2018 , pp. 250-258 More about this Journal
Abstract
Free Standing Hybrid Riser (FSHR) is comprised of vertical steel risers and Flexible Jumpers (FJ). They are jointly connected to a submerged Buoyancy Can (BC). There are several factors that have influence on the behavior of FSHR such as the span distance between an offshore platform and a foundation, BC up-lift force, BC submerged location and FJ length. An optimization method through a parametric study is presented. Firstly, descriptions for the overall arrangement and characteristics of FSHR are introduced. Secondly, a flowchart for optimization of FSHR is suggested. Following that, it is described how to select reasonable ranges for a parametric study and determine each of optimal configuration options. Lastly, numerical analysis based on this procedure is performed through a case study. In conclusion, the relation among those parameters is analyzed and non-dimensional parametric ranges on optimal arrangements are suggested. Additionally, strength analysis is performed with variation in the configuration.
Keywords
Free standing hybrid riser; Hybrid riser system; Buoyancy can; Flexible jumper; Deepwater; Multi-body dynamics;
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