Effect of time elapse after wave hitting on coupled spar platform

Saiful Islam, A.B.M. and Jameel, M. and Jumaat, Mohd Zamin (2011) Effect of time elapse after wave hitting on coupled spar platform. International Journal of Physical Sciences, 6 (11). pp. 2671-2680. ISSN 19921950, DOI https://doi.org/10.5897/AJBM11.454.

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Abstract

Oil and gas exploration has moved from shallow to much deeper water now-a-days. Offshore compliant floating structure like Spar platforms in this region are competent deep water platform. As water depth increases operational Spar platforms experience more influence of mooring lines suggestively. So the motion analysis of platforms in deep waters requires counting the mooring upshot with spar hull. The most common approach for solving the dynamics of Spar platform is to employ a decoupled quasistatic method, which ignores all or part of the interaction effects between the platform and mooring lines. Coupled analysis in the present study includes the mooring lines and platform in a single model. This model can cope with the coupling conduct and match the forces, displacement, velocities and acceleration at the fairlead position along with all possible significant nonlinearities. The output from such analyses is essentially platform motions as well as a mooring line response. In actual field problems hydrodynamic loads due to wave and currents act simultaneously on Spar platform and mooring lines. In this finite element model, the entire structure acts as coupled in consistent manner. This offshore Spar platform model has been analyzed in regular wave of ocean environment. Surge, heave and pitch motion responses of coupled Spar platform is obtained after 1000 and 6000 s of storm. The behaviors of dynamic responses have been evaluated as noteworthy even for time elapse after wave hitting.

Item Type:	Article
Funders:	UNSPECIFIED
Additional Information:	Cited By (since 1996): 5 Export Date: 6 January 2013 Source: Scopus Language of Original Document: English Correspondence Address: Saiful Islam, A. B. M.; Department of Civil Engineering, University of Malaya, Kuala Lumpur, Malaysia; email: abm.saiful@gmail.com References: Chen, X.H., Zhang, J., (1999) Coupled Time-domain Analysis of the Response of a Spar and Its Mooring System, pp. 293-300. , International Offshore Polar Engineering Conference (ISOPE); Chen, X.H., Zhang, J., Ma, W., On dynamic coupling effects between a spar and its mooring lines (2001) Ocean Eng, 28, pp. 863-887; Chen, X., Ding, Y., Zhang, J., Liagre, P., Niedzwecki, J., Teigen, P., Coupled dynamic analysis of a mini TLP: Comparison with measurements (2006) Ocean Eng, 33, pp. 93-117; Colby, C., Sodahl, N., Katla, E., Okkenhaung, S., (2000) Coupling Effects For a Deepwater Spar, pp. 2-7. , Offshore Technology Conference, OTC 12083; Fan, Z., Jian-Min, Y., Run-Pei, L., Gang, C., Coupling effects for celltruss spar platform: Comparison of frequency-and time-domain analyses with model tests (2008) J. Hydrodyn, 20 (4), pp. 424-432; Gupta, H., Finn, L., Weaver, T., (2000) Effects of Spar Coupled Analysis, pp. 1-10. , Offshore Technology Conference, OTC 12082; Islam, A.B.M.S., Jameel, M., Jumaat, M.Z., Study on optimal isolation system and dynamic structural responses in multi-story buildings (2011) Int. J. Phys. Sci, 6 (9), pp. 2219-2228; Islam, A.B.M.S., Ahmad, S.I., Jameel, M., Jumaat, M.Z., Study on corollary of seismic base isolation system on buildings with soft story (2011) Int. J. Phys. Sci, , In Press; Jameel, M., (2008) Non-linear Dynamic Analysis and Reliability Assessment of Deepwater Floating Structure, , PhD thesis. Department of Applied Mechanics, Indian Institute of Technology, Delhi (IIT Delhi); Kim, M.H., Ran, Z., Zheng, W., Hull/Mooring Coupled dynamic analysis of a Truss Spar in time domain (2001) Int. J. Offshore Polar. Eng, 11 (1), pp. 42-53; Kim, M.H., Tahar, A., Kim, Y.B., (2001) Variability of TLP Motion Analysis Against Various Design Methologies/parameters, 3, pp. 467-473. , Int. Offshore Polar Eng. Conf. (ISOPE); Kim, M.H., Ward, E.G., Haring, R., (2001) Comparison of Numerical Models For the Capability of Hull/mooring/Riser Coupled Dynamic Analysis For Spars and TLPs In Deep and Ultra-Deep Waters, 3, pp. 474-479. , Int. Offshore Polar Eng. Conf. (ISOPE); Kim, M.H., Koo, B.J., Mercier, R.M., Ward, E.G., Vessel/mooring/riser couple dynamic analysis of a turret-moored FPSO compared with OTRC experiment (2005) Ocean Eng, 32, pp. 1780-1802; Low, Y.M., Prediction of extreme responses of floating structures using a hybrid time/frequency domain coupled approach (2008) Ocean Eng, 35, pp. 1416-1428; Low, Y.M., Langley, R.S., A hybrid time/frequency domain approach for efficient coupled analysis of vessel/mooring/riser dynamics (2008) Ocean Eng, 35 (5-6), pp. 433-446; Ma, W., Lee, L.-Y., (2000) Deepwater Nonlinear Coupled Analysis Tool, pp. 1-11. , Offshore Technology Conference, OTC 12085; Ormberg, H., Larsen, K., Coupled analysis of floater motion and mooring dynamics for a turret-moored ship (1998) Appl. Ocean Res, 20, pp. 55-67; Paulling, J.R., Webster, W.C., A consistent, large-amplitude analysis of the coupled response of a TLP and tendon system (1986) Offshore Mech. Arctic Eng. Symp. (OMAE), 3, pp. 126-133; Ran, Z., Kim, M.H., (1996) Nonlinear Coupled Response of a Tethered Spar Platform In Waves, pp. 281-287. , Int. Offshore Polar Eng. Conf. (ISOPE); Ran, Z., Kim, M.H., Niedzwecki, J.M., Johnson, R.P., Response of a Spar platform in Random Waves and Currents (Experiment vs. Theory) (1996) Int. J. Offshore. Polar. Eng, 6 (1), pp. 27-34; Ran, Z., Kim, M.H., Nonlinear coupled responses of a tethered spar platform in waves (1997) Int. J. Offshore Polar Eng, 7 (2), pp. 111-118; Ran, Z., Kim, M.H., Zheng, W., Coupled dynamic analysis of a moored spar in random waves and currents (time-domain versus frequencydomain analysis) (1999) J. Offshore Mech. Arctic Eng, 121, pp. 194-200; Tahar, A., Kim, M.H., Coupled-dynamic analysis of floating structures with polyester mooring lines (2008) Ocean Eng, 35, pp. 1676-1685; Yang, C.K., Kim, M.H., Transient effect of tendon disconnection of a TLP by hull-tendon-riser coupled dynamic analysis (2010) Ocean Eng, 37, pp. 667-677
Uncontrolled Keywords:	Coupling, Deep-water structure, Mooring lines, Motion responses, Nonlinearities, Ocean environment, Offshore compliant floating, Oil and gas exploration, Spar platform, Time elapse, Wave hitting.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Engineering
Depositing User:	Mr Jenal S
Date Deposited:	24 Apr 2013 01:45
Last Modified:	05 Feb 2020 04:36
URI:	http://eprints.um.edu.my/id/eprint/5919

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