In Lazy S system, the riser is similar to free-hanging catenary but has support provided at about Mid-Water by an arch structure. One of the main functions for the introduction of a Mid-Water Arch (MWA) into a riser system is to provide a filter to stop the direct transfer of dynamic tension amplitude to the Touch-down Point (TDP) on seabed that occurs with the free-hanging configuration. By using the Morison equation to calculate the wave loads on a MWA, the difficulty is to determine correct hydrodynamic coefficients. Analysis was performed by using Orcaflex to investigate the effect of hydrodynamic coefficients on the MWA loadings. Dynamic analysis was run under Airy wave with different drag force and added mass coefficients. The effect of drag moment of area was considered as well. Base on the comparison among the simulation results, some conclusions and discussion were presented.
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ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering
June 9–14, 2013
Nantes, France
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-5537-9
PROCEEDINGS PAPER
Effect of Hydrodynamic Coefficients on a Typical MWA Model Available to Purchase
Guoxing Huang,
Guoxing Huang
Dalian University of Technology, Dalian, China
Search for other works by this author on:
Ningchuan Zhang
Ningchuan Zhang
Dalian University of Technology, Dalian, China
Search for other works by this author on:
Guoxing Huang
Dalian University of Technology, Dalian, China
Ningchuan Zhang
Dalian University of Technology, Dalian, China
Paper No:
OMAE2013-11091, V04BT04A024; 4 pages
Published Online:
November 26, 2013
Citation
Huang, G, & Zhang, N. "Effect of Hydrodynamic Coefficients on a Typical MWA Model." Proceedings of the ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. Volume 4B: Pipeline and Riser Technology. Nantes, France. June 9–14, 2013. V04BT04A024. ASME. https://doi.org/10.1115/OMAE2013-11091
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