... performance of ships with moonpool Xinyi YU1,2 Lilan ZHOU1,2 1. Key Laboratory of High Performance Ship Technology (Wuhan University of Technology), Ministry of Education, P. R. China. 2. School of Naval Architecture,Ocean and Energy Power Engineering, Wuhan University of Technology, P. R. China. Wuhan, Hubei...

... ABSTRACT Moonpools are the vertical openings on drillships and offshore structures applied to lower or lift equipment for operation. Open moonpools have an adverse impact on ship's resistance performance. In this paper, added resistance of two moonpool configurations is investigated...

...ABSTRACT ABSTRACT Moonpool added resistance is a practical problem in drillship design. In the past, studies are more focused on calm water resistance but few attempts on wave added resistance. In this study, CFD simulations are performed for a drillship with a large moonpool opening...

...ABSTRACT ABSTRACT Open moonpool in drillship will cause additional resistance and limit the adaptability of ship. Considering these problems, a numerical method based on STAR-CCM+ was adopted to simulate the resistance of ship with moonpools. Six cases with different step positions and step...

... Moonpools are typical structures employed on a drilling vessel and offshore platforms to facilitate drilling and other marine operations. In the present study, the evolutions of vortex structures inside a moonpool with a recess are investigated within the frameworks of numerical methods...

...Study on Hydrodynamic Performances of a Deep-Water Drillship and Water Motions inside Its Rectangular Moonpool Xiaoxian Guo, Haining Lu, Jianmin Yang, Tao Peng State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, China. Collaborative Innovation Center for Advanced...

... loading; semi-submersible; moonpool INTRODUCTION Extreme hydrodynamic wave impact on rigid and floating structures is of high industrial interest in offshore and coastal engineering. To study the occurring phenomena the CFD VOF-based simulation tool has been developed; see e.g. Kleefsman et al. (2005...

.... moonpool subsea system sea case motion equation increment harmonic balance identification technique multi-step ihb method upstream oil & gas fpso compensator oscillation chung coefficient freedom sheltered riser vessel zhanglan chen equation nonlinear parameter floating production...

... Sensitivity Investigation on Wave Dynamics with Thin-Walled Moonpool S. Yan Q.W. Ma School of Engineering and Mathematical Sciences, City University London London, UK ABSTRACT Thin-walled structures with open bottom are commonly used in offshore engineering. When predicting associated wave...

... response of the semi-sub at low wave periods compounds the wave loading effect on the riser while the moonpool of the drill-ship shields the riser from the wave zone and modifies the response of the riser. wave zone wellhead drillship fatigue life rig stiffness seastate tensioner system...

... the loading arm, the mooring and fendering systems, as well as when defining operational limits for the offloading operation. time series oscillation kristiansen numerical simulation elevation liquified natural gas decay moonpool solver terminal wave elevation ship section lng faltinsen...

... ABSTRACT The moonpool is a vertical opening through the deck and hull of a ship used for marine and offshore operations. The water surface motion in the moonpool has resonant behavior with respect to different possible free water surface modes, such as the piston mode, where the water inside...

... resonances of the moonpool between two heaving rectangular floating bodies. It is shown that at Helmholtz resonances the hydrodynamic coefficients have dis- tinctively bounded behavior as compared to the others modes. This serves as an identifying characteristic between the two different types of resonance...

...) mounted with a clearance in the drilling vessel moonpool with the IPP bottom being several meters distant below the keel. The motion of the drillstring and IPP in ice sheets is accompanied by vigorous oscillation caused by contact interaction between the drillstring and IPP as well as between IPP...

... ABSTRACT The flow dynamics in a moonpool is evaluated through analysis of experimental and numerical time series of surface elevations. Experimental results are obtained in the context of the interaction of irregular waves with the barge. The excitation of natural sloshing and piston modes...

...-states. Typical natural periods of the spars deployed in the Gulf of Mexico are 160s for surge, 60s for pitch and 28s for heave. spar platform resonance subsea system fpso engineering conference international offshore moonpool heave amplitude ratio heave motion upstream oil & gas...

... ABSTRACT Conceptual design results for a new generation mobile offshore drilling unit (MODU) were presented at the 1997 Black Sea Symposium (Capanoglu and Copple, 1997). Since then, analytical studies have been refined to investigate design variations, moonpool response anomalies...

... gas monetization flexibility upstream oil & gas subsea system efficiency exchanger operation composition flowline loading system consideration barge moonpool configuration lng liquified natural gas shuttle tanker heat exchanger requirement mobil lng barge lng plant hull...

... ABSTRACT A series of forced oscillation experiments were performed on the water-columns of a smooth circular moonpool and of two circular moonpools, one with a baffle at the mid-draft and one with a baffle at the mouth. Added mass and damping were derived from the experiments for non...