1. bookVolume 30 (2022): Issue 1 (March 2022)
Journal Details
License
Format
Journal
eISSN
1338-3973
First Published
23 May 2011
Publication timeframe
4 times per year
Languages
English
access type Open Access

Numerical Study on the Effect of Water Waves and Depths on Inclined Braces with Respect to the Stability of VLFS Platforms in the Caspian Sea

Published Online: 13 Apr 2022
Volume & Issue: Volume 30 (2022) - Issue 1 (March 2022)
Page range: 42 - 48
Journal Details
License
Format
Journal
eISSN
1338-3973
First Published
23 May 2011
Publication timeframe
4 times per year
Languages
English
Abstract

Very large floating structures (VLFSs) have various applications, such as recreational applications, port facilities, etc. A surge in the population, the advantages of building floating structures compared to traditional methods of land extraction from the sea, and the development of construction technologies, have led to engineers paying attention to very large floating structures. Bracing systems are capable of controlling and reducing the horizontal responses of a floating platform, but they have no major impact on its vertical responses. In the present study, the semi-floating platform was numerically designed to be least affected by the three factors of wave force, horizontal torsion, and horizontal displacement. In order to optimize the design, the semi-floating platform was simulated and subjected to the three wave directions with collision angles of 40, 45 and 55 degrees in the environmental conditions of the Caspian Sea and by exerting the wave effect in a Flow-3D model. Examination of the platform’s movements has demonstrated that the arrangement of an eight-way restraint system with a 40-degree restraint angle responds better to the impact of waves and is more economical compared to other designs.

Keywords

Karimi, A. - Rahmanlu, S. (2016) Control of the Amirkabir semi-submersible platform in deep waters in the Caspian Sea, challenges, design and implementation. Scientific Journal of Exploration & Production Oil & Gas, Vol. 130, pp. 6-10 [in Persian]. Search in Google Scholar

Ketabdari, M. J. - Bakhtiari, M. - Ghassemi, H. (2018) Numerical analysis of the effects of mooring line configurations on the dynamic response of a truss spar platform in sea waves. Iranian Journal of Science and Technology: Marine Technology, Vol. 5, pp. 53-62. Search in Google Scholar

Ohmatsu, S. (1998) Numerical calculation of hydroelastic behavior of VLFS in time domain. In: Proceeding of 2nd International Conference on Hydroelasticity in Marine Technology, Fukuoka, Japan.10.2534/jjasnaoe1968.1998.184_223 Search in Google Scholar

Parizadeh, A. - Khanjani, M. J. (2017) An Experimental Study on the Effect of Gill Cells on Very Large Floating Structures. Journal of Ferdowsi Civil Engineering, Vol. 28, No. 2, pp. 57-76. https://doi.org/10.22067/civil.v28i2.37882 Search in Google Scholar

Rashidi J. - Ahmadi, A. - Seif, M. S. - Azarsina, F. (2015) Experimental study of Creelov-landing force due to regular wave refraction on a semi-floating platform. Sixth International Offshore Conference, Sharif University of Technology, Tehran, Sharif University of Technology. Search in Google Scholar

Utsunomiya, T. - Watanabe, E. - Eatock Taylor, R. (1998) Wave response analysis of a box-like VLFS close to a breakwater. In Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE ASME. Search in Google Scholar

Wang, C. M. - Tay, Z.W. - (2011) Very Large Floating Structure: Applications, Research and Development. Procedia Engineering, Vol. 14, pp. 62-72.10.1016/j.proeng.2011.07.007 Search in Google Scholar

Watanabe, E. - Wang, C. M. - Utsunomiya, T. - Moan, T. (2004) Very large floating structures: Applications, analysis and design. CORE Report No. 2004-02; National University of Singapore. Search in Google Scholar

https://web-japan.org/atlas/technology/tec14.html Search in Google Scholar

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