Normally design bottom slamming pressure of semi-submersible type floater is determined in a simple way using a relative speed obtained from an air-gap analysis. However, there are few studies on a robust background on the estimation of the design pressure. In this study, to investigate the slamming pressure on the bottom of semi-submersible rig, a simplified deformable stiffened plate with 0° dead rise angle is simulated by using nonlinear FEM software, LS-DYNA which can take the influence of Fluid-Structure Interaction (FSI) into account. To simulate the slamming condition of semi-rig in a similar way, water hitting the structure with fixed boundary conditions is proposed. Various parametric studies are carried out to examine the effect of structural flexibility, coupling stiffness, mesh size, velocity, stiffener size, and air cushion effect. To further investigate the effect of horizontal velocity, the model is expanded and simulated with various horizontal water velocities. Pressure response on the plate by the coupling of fluid and structure is studied and the hydroelastic effect of each parameter is discussed.
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ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering
June 8–13, 2014
San Francisco, California, USA
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4540-0
PROCEEDINGS PAPER
Study on Slamming Pressure on the Bottom of Upper Hull of Semi-Submersible Type Floater
Jin Sol Cheon,
Jin Sol Cheon
Seoul National University, Seoul, Korea
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Beom Seon Jang,
Beom Seon Jang
Seoul National University, Seoul, Korea
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Ki Ho Yim,
Ki Ho Yim
Seoul National University, Seoul, Korea
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HoSeong Daniel Lee,
HoSeong Daniel Lee
American Bureau of Shipping, Houston, TX
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Bon-Yong Koo
Bon-Yong Koo
American Bureau of Shipping, Busan, Korea
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Jin Sol Cheon
Seoul National University, Seoul, Korea
Beom Seon Jang
Seoul National University, Seoul, Korea
Ki Ho Yim
Seoul National University, Seoul, Korea
HoSeong Daniel Lee
American Bureau of Shipping, Houston, TX
Bon-Yong Koo
American Bureau of Shipping, Busan, Korea
Paper No:
OMAE2014-23905, V002T08A053; 9 pages
Published Online:
October 1, 2014
Citation
Cheon, JS, Jang, BS, Yim, KH, Lee, HD, & Koo, B. "Study on Slamming Pressure on the Bottom of Upper Hull of Semi-Submersible Type Floater." Proceedings of the ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. Volume 2: CFD and VIV. San Francisco, California, USA. June 8–13, 2014. V002T08A053. ASME. https://doi.org/10.1115/OMAE2014-23905
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