... independently. research and development omco-lockheed upstream oil & gas track path metals & mining ship commercial mining system seafloor pipe pipe bottom end collector chung bottom end the miner north pacific ocean operation buffer miner glomar explorer touchdown mining...

... invested in the exploration of deep-sea minerals, manganese nodules in particular, and in the development of mining technology since 1960s (Mero, 1965; Willums and Bradley, 1974; Chung and Tsurusaki, 1994; Chung, 1999; Chung, 2005; Chung, 2009). So far, a variety of collecting methods (e.g. hydraulic...

... typically consists of a mining supporting vessel, VTS (Vertical Transport System) which has a free-hanging rigid riser with pump(s) and sometimes a buffer located along it, flexible jumper and seafloor mining machine. operation pipe upstream oil & gas topside connection axial response chung...

... applications have been proposed since 1960s (Mero , 1965; Willums and Bradley , 1974; Chung , 1999; Chung , 2005; Chung , 2009). One of the most important issues in deep-ocean mining is the hydraulic collecting near seabed. Typically, ore particles can be collected to the collector in the upward...

... with the realistic production plans. The research conducted in this paper is meaningful for the pre-design and evaluation of a deep sea mining project. INTRODUCTION In the year 1965 deep sea mining (DSM) research was first reported with the publication of J. L. Mero's The Mineral Resources of the Sea (Chung...

... as the most valuable alternative sources. Deep sea mining applications has been proposed since 1960s (Mero, 1965; Willums and Bradley, 1974; Chung, 1999; Chung, 2005; Chung, 2009). One of the most important issues in deep sea mining is the ore transportation from seafloor. Typically, ore particles can...

... forces in Morison equation used in the industry have been disputed by some. This prompted the author to make the connection between the Morison equation (1950) and theoretical hydrodynamic equations (Chung, 1975, 1976). A hydrodynamic force equation was derived from the velocity potential...

.... 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...

... within 2N. A brief summary of on-going work to implement the dynamics model in a low-level thruster controller is also provided. vague-directional state thrust force thruster coefficient rov chung artificial intelligence renewable energy shroud experiment observation class rov amo...

...-year typhoon met in the South China Sea, dynamic response of the riser hard hung off to evacuate with HYSY 981 drilling platform is studied. beam element upstream oil & gas chung maximum von mise stress drilling platform hang-off mode mise stress evacuate operation drilling riser...

... operation of the pipe bottom and the equipment at its bottom. software axial stress deep-ocean mining system operation hughes glomar explorer pipe mining system amplitude pipe bottom resonance upstream oil & gas axial resonance ocean ship chung north pacific ocean perception...

... Evans and Davies (1968) solution was developed fur- ther by Gol dshtein and Marchenko (1989) and Tkacheva (2001a,b,c) for a normally incident wave train, and by Balmforth and Craster (1999), Tkacheva (2004) and Chung and Fox (2001, 2002a) for oblique inci- dence. Tkacheva (2001b), for example, was able...

... pipe linear discrete-time system machine learning converge chung Proceedings of the Eleventh (2001) International Offshore and Polar Engineering Conference Stavanger, Norway, June 17-22, 2001 Copyright © 2001 by The International Society of Offshore and Polar Engineers ISBN 1-880653-51-6(Set...

... of Vertical Pipe Bottom Pin-Joined to a Horizontal Pipe to Ship Motion and Thrust on Pipe - Part II: Comparison of MSE and FEM Results (A) J in S. Chung Colorado School of Mines Golden, CO, USA ABSTRACT The present entire pipe system consists of a very long vertical pipe with elastic joints, pin-joining...

... to prefer a self-propelled, seafloor vehicle ("miner" or "collector") to operate at 800–6000-m depth, that is similar to those of Chung and Chung et al. (1980–1997). This will likely lead to change in the pipe-to-miner link connecting systems for water-solid transport, similar to that of Chung, Whitney...

... In applying external forces or thrust vectors to the elastic joints along a vertical deep-ocean pipe, the joints are modeled in Part I of this paper (Chung and Cheng, 1997) by finite elements (FEM) as well as mass-spring elements (MSE). The MSE can provide greater accuracy for a pipe...

... at 4,000 – 6000-m depth, which is similar to those of Chung and Chung et al. (1980. 1995). Further research of such a self-propelled miner will likely lead to a change in the connecting systems of the lift (or vertical flow) pipe to the miner, similar to that of Chung, Whitney and Loden (1980 and 1981...

... stiffness torsional vibration biaxial vibration offshore axial damper cheng axial stress excitation axial vibration resonance fundamental axial period elastic joint chung pipe amplitude metals & mining deflection vertical pipe ABSTRACT Reduction in the axial stress...

... surface. There clearly exists a critical non-dimensonal frequency near ω 2 a/g = 0.3 for the heave oscillations near the free surface, as was measured previously but not predicted by a potential theory for a long, 2- D horizontal cylinder in intinite depth (Chung, 1977). Also, negative added mass...

... of the methods applied here is to change the fundamental axial frequency and the static equilibrium state of a pipe. displacement axial displacement pipe stiffness static response dynamic response fundamental axial period pipe system ka 105 flexible joint frequency vibration chung axial...