An integrated dynamic model of ocean mining system and fast simulation of its longitudinal reciprocating motion

2013 ◽  
Vol 27 (2) ◽  
pp. 231-244 ◽  
Author(s):  
Yu Dai ◽  
Shao-jun Liu
Keyword(s):  
Dynamic Model ◽  
Fast Simulation ◽  
Reciprocating Motion ◽  
Mining System ◽  
Ocean Mining

Heave Induced Internal Flow Fluctuations in Vertical Transport Systems for Deep Ocean Mining

2014 ◽  
Author(s):  
Stephan D. A. Hannot ◽  
Jort M. van Wijk
Keyword(s):  
Transport System ◽  
Internal Flow ◽  
Deep Ocean ◽  
Vertical Transport ◽  
Transport Systems ◽  
Ship Motions ◽  
Centrifugal Pumps ◽  
Mining System ◽  
Pump System ◽  
Ocean Mining

Deep ocean mining systems will have to operate often in harsh weather conditions with heavy sea states. A typical mining system consists of a Mining Support Vessel (MSV) with a Vertical Transport System (VTS) attached to it. The transport system is a pump pipeline system using centrifugal pumps. The heave motions of the ship are transferred to the pump system due to the riser-ship coupling. Ship motions thus will have a significant influence on the internal flow in the VTS. In this paper, the influence of heave motions on the internal flow in the VTS for a typical mining system for Seafloor Massive Sulfide (SMS) deposits in Papua New Guinea is analyzed. Data on the wave climate in the PNG region is used to compute the ship motions of a coupled MSV-VTS. The ship motions then are translated into forces acting on the internal flow in order to compute fluctuations in the internal flow. In this way, the workability of the mining system with respect to the system’s production can be assessed. Based on a detailed analysis of the internal flow in relation to ship motions, the relevance of a coupled analysis for the design of VTS is made clear. This paper provides a method for performing such analyses.

Dynamic Model Development and Simulation Analysis of China’s Total Integrated Deep Ocean Mining Pilot System

2010 ◽  
Author(s):  
Yu Dai ◽  
Shaojun Liu ◽  
Li Li ◽  
Yan Li ◽  
Gang Wang ◽  
...  
Keyword(s):  
Dynamic Analysis ◽  
Deep Ocean ◽  
Pipeline System ◽  
Mining System ◽  
Fem Model ◽  
Body Model ◽  
Single Body ◽  
Operation Process ◽  
Ocean Mining ◽  
Dem Model

A typical and may be the most prospective deep ocean mining system is an integration of a mining ship system, a hoist pipeline system and a self-propelled seafloor miner system. According to this representative system configuration, China has designed and developed a deep ocean mining pilot system. In order to evaluate and improve the design of the pilot system, and further to provide technical references for the practical system operation, dynamic simulation models of the subsystems and the total integrated system are developed. For the seafloor miner, a multi-body model with the scale of 1:1 to the actual size of the pilot miner is built, which can be used effectively to perform detailed design, analysis and optimization of the miner system. Meanwhile, to make the integration of the total mining system possible, a simplified 3D single-body model with 6 DOF of the miner is also developed, which is capable of real-time simulation and can be easily integrated with other subsystems. For the pipeline system including the rigid lifting pipe, submerged pump, buffer storage and flexible hose, finite element method (FEM) and discrete element method (DEM) are all proposed and developed. With the FEM model, the towing mining operation process, as well as the launching and retrieval process, can be analyzed. Whereas, the DEM model is preferred to perform the dynamic analysis of the total integrated mining system due to its relative high computation efficiency compared with that of the FEM model. To realize the dynamic analysis of the total integrated mining system with relative high efficiency and accuracy, the single body model of the miner and the DEM model of the pipeline are chosen to be integrated to form the total system and perform dynamic analysis, which in a way can provide specific guidance and suggestions for the practical deep ocean mining system analysis, operation and control. For further researches, more attention will be focused on the analysis of the launching and retrieval operation process of the total mining system, including the water entry of the miner, the launching process of the pipeline system and the final seafloor-touchdown of the miner.

Dynamics of vertical pipe in deep-ocean mining system

2007 ◽  
Vol 14 (4) ◽  
pp. 552-556 ◽  
Author(s):  
Hong-yun Yu ◽  
Shao-jun Liu
Keyword(s):  
Deep Ocean ◽  
Vertical Pipe ◽  
Mining System ◽  
Ocean Mining

Dynamics of a Pipe Aspirating Fluid Such as Might be Used in Ocean Mining

1985 ◽  
Vol 107 (2) ◽  
pp. 250-255 ◽  
Author(s):  
M. P. Paidoussis ◽  
T. P. Luu
Keyword(s):  
Internal Flow ◽  
Large Mass ◽  
Wave Action ◽  
Mining System ◽  
Fluid Medium ◽  
Small Flow ◽  
Marine Currents ◽  
Cantilevered Pipe ◽  
Ocean Mining ◽  
Passive Stabilization

This paper presents an investigation into the dynamics and stability of a long, vertically disposed, cantilevered pipe, submerged in and aspirating fluid from the free lower end, and conveying it upwards to the supported upper end; the pipe has a large mass attached to its free end. The arrangement represents an idealization of an ocean mining system. This paper reports on the first phase of this work, in which the following simplifications have been made: (i) the pipe is straight at equilibrium; (ii) the effects of marine currents and wave action are not considered. It is shown that under the action of the internal flow, the system is inherently unstable, by flutter, and that it does not lose stability at vanishingly small flow velocities, only because of dissipation, through friction with the external fluid medium. Effective passive stabilization of the system may be achieved through artificial augmentation of this form of dissipation.

scholarly journals A New Multi-Body Dynamic Model of a Deep Ocean Mining Vehicle-Pipeline-Ship System and Simulation of Its Integrated Motion

2016 ◽  
Vol 62 (12) ◽  
pp. 757-763 ◽  
Author(s):  
Yu Dai ◽  
Liping Pang ◽  
Lisong Chen ◽  
Xiang Zhu ◽  
Tao Zhang
Keyword(s):  
Dynamic Model ◽  
Deep Ocean ◽  
Multi Body ◽  
Ocean Mining ◽  
Body Dynamic

Environmental Monitoring Of a Deep Ocean Mining System Test

1979 ◽  
Author(s):  
O.F. Steffin ◽  
R.E. Burns ◽  
B.H. Erickson ◽  
J.W. Lavelle ◽  
E.F. Ozturgut
Keyword(s):  
Environmental Monitoring ◽  
Deep Ocean ◽  
Mining System ◽  
Ocean Mining
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