State Key Laboratory of deep sea mineral resources development and utilization technology

Changsha, China

State Key Laboratory of deep sea mineral resources development and utilization technology

Changsha, China
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Li L.,Central South University | Li L.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology | Wen R.,Central South University | Chen M.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology | Zhang W.,Carrie Heavy Industry Machinery Ltd Company
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2014

By using ADAMS software based on multi-rigid-body dynamics theory, the multi-rigid-body dynamics model of new tapping vehicle transporting, loading and unloading electrolytic aluminium was built. Its hydraulic and controlling models were established by utilizing AMEsim software. Based on solving the interface technology between ADAMS and AMEsim software, the co-simulation model of the mechanical-electronic-hydraulic combined system for the new tapping vehicle was set up, and the co-simulation of climbing 10% slope was completed. Moreover, based on finite element theory, the finite element models of the carriage and the door frame in the new tapping vehicle were built. And according to the vehicle's dynamics results got from the previous co-simulation, the finite element analysis for the carriage and the door frame were completed by employing ANASYS software. The results of the co-simulation show that the tapping vehicle's kinematics and dynamics results have reflected its actual driving situation. The results of the finite element results show that the strength and stiffness of the carriage and the door frame have satisfied the design requirements.


Li L.,Central South University | Li L.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology | Zhang Z.,Central South University | Chen M.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology | Pan J.,Central South University
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2014

According to the underactuated and nonlinear characteristics of the seabed mining vehicle in China, the kind of control law based on the Lyapunov theory in the point stabilization controlling system was put forward. And it was proved that the position and direction error of seabed mining vehicle was converged during the action of this control law. The point stabilization controller was designed. Using ADAMS/ATV module and MATLAB/simulink software, the co-simulation model based on multi-rigid-body dynamics model and point stabilization control model of seabed mining vehicle was established. And the point stabilization control co-simulation of seabed mining vehicle was carried out. The results show that the seabed mining vehicle can move rapidly and steadily to the target position and direction during the action of the controller based on Lyapunov theory, and the proposed control law and the designed controller are effective for moving control of the seabed mining vehicle.


Hu X.-Z.,Central South University | Hu X.-Z.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology | Liu S.-J.,Central South University | Liu S.-J.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology
Journal of Central South University | Year: 2014

A test rig for constant velocity water entry experiments was developed that drives a flatted-bottom section attached on six degree of freedom(6-DOF) platform to enter the water vertically at near constant velocity. The experiment system, which consists of drive and actuation system, water pool, model test sections, load cell, and control system, was presented. Water entry forces of different velocities were measured during impact process, and for each test case, three runs were performed with the same motion program to check the repeatability of the force readings. The experiment results are compared with two-dimensional (2D) CFD simulation methods for flatted-bottom rigid bodies with constant entry velocity. Experimental results indicate that the impact forces mainly depend on water entry velocities. It is concluded that the feasibility and accuracy of simulation methods has been validated. © 2014 Central South University Press and Springer-Verlag Berlin Heidelberg.


Wu H.-Y.,State Key Laboratory of deep sea mineral resources development and utilization technology | Wu H.-Y.,Changsha Institute of Mining Research | Chen Z.,Changsha Institute of Mining Research
Applied Mechanics and Materials | Year: 2013

The shear strength parameter of cobalt-rich crusts can be used to design cobalt-rich crusts mining head. The shearing test of cobalt-rich crusts sample was done with different angle shearing testing apparatus. Firstly, the cobalt-rich crusts sample with the size of 50mm×50mm×50mm cube was clamped in the variable angle plate. Secondly, the sample ware loaded till to be damaged. Lastly, the damaged load were recorded at the degree of 50, 60 and 70 to establish their shearing strength and normal stress empirical formula. According to the testing result, its cohesion and internal friction angle parameters are respectively 0.275MPa and 54.43 degree. Restricted by the number of samples and limited by laboratory testing, in-situ shearing strength test should be carried out to improve the proposed empirical formula. © (2013) Trans Tech Publications, Switzerland.


Liu S.,Central South University | Liu S.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology | Hu J.,Central South University | Hu J.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology | And 5 more authors.
Chinese Journal of Mechanical Engineering (English Edition) | Year: 2016

Seafloor massive sulfide (SMS) deposits which consist of Au, Ag, Cu, and other metal elements, have been a target of commercial mining in recent decades. The demand for established and reliable commercial mining system for SMS deposits is increasing within the marine mining industry. The current status and progress of mining technology and equipment for SMS deposits are introduced. First, the mining technology and other recent developments of SMS deposits are comprehensively explained and analyzed. The seafloor production tools manufactured by Nautilus Minerals and similar mining tools from Japan for SMS deposits are compared and discussed in turn. Second, SMS deposit mining technology research being conducted in China is described, and a new SMS deposits mining tool is designed according to the environmental requirement. Finally, some new trends of mining technology of SMS deposits are summarized and analyzed. All of these conclusions and results have reference value and guiding significance for the research of SMS deposit mining in China. © Chinese Mechanical Engineering Society and Springer-Verlag Berlin Heidelberg 2016.


Li L.,Central South University | Li L.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology | Liu S.,Central South University | Liu S.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology | Zuo J.,Central South University
Applied Mechanics and Materials | Year: 2010

To ensure the safety and the production efficiency as well as the component lifetime of deep-sea mining system, a novel heave compensation system of deep-sea mining based on dynamic vibration absorber was proposed in the light of 5000m deep sea poly-metallic mining system of China in this paper. According to the work condition of heave compensation system, the response of deep-sea mining ship under random wave of sea state 4 in China's deep sea poly-metallic mining field are numerically simulated in time domain. The proposed heave compensation system was simplified to a two-degree-of-freedom system stimulated by the displacement motion of the deep-sea mining ship and its dynamic model was built. Taking the minimum of the displacement variance of the proposed heave compensation system as the optimal object and considering the allowed displacement of the dynamic vibration absorber itself, the computation formula of the optimum parameters of dynamic vibration absorber for heave compensation system of deep-sea mining is derived. Thus the parameter of dynamic vibration absorber was determined and its effect on the performance index of the heave compensation system was simulated and compared. The dynamic vibration absorber with optimum parameters was simulated and tested on the test bench of double-storey mass-spring vibration system in the lab. The results of the example show that the performance of vibration control of the designed dynamic vibration absorber is satisfactory and the computational formulas given in the paper are effective. The results also verified that the heave compensator based on dynamic vibration absorber with the optimal parameters can have good performance of heave compensation and it is practical to isolate the lifting pipeline and its deployment platform from the vibration of the ship motion induced by the irregular wave with simplicity and less energy consumption. This work in the paper will be of great theoretical guidance in the optimum design of the dynamic vibration absorber for heave compensation system of deep-sea mining. © (2010) Trans Tech Publications, Switzerland.


Jianhua H.,Central South University | Jianhua H.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology | Shaojun L.,Central South University | Shaojun L.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology | And 4 more authors.
Electronic Journal of Geotechnical Engineering | Year: 2015

Damage constitutive model of seafloor massive sulfide(SMS) was selected as the research object. Strength of every unit of SMS was assumed of basing on Weibull distribution, and the breaking strength was supposed to meet the Drucker-Prager or Mohr-Coulomb criterion, a new damage constitutive equations in uniaxial compression condition was deduced. The uniaxial constitutive equation of seafloor massive sulfide based on D-P and M-C strength criterion can be calculated, and through theoretical and experimental curve's comparison, which is found that both are in good agreement, and there are a little difference when uniaxial damage constitutive curves based on the two strength criterions are compared. Mohr Coulomb constitutive and the experimental data curves are closer than the D-P constitutive curves. © 2015 ejge.


Hu J.,Central South University | Hu J.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology | Liu S.,Central South University | Liu S.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology | And 4 more authors.
Geotechnical and Geological Engineering | Year: 2016

The uniaxial compressive breaking process of energy of deep-sea Cobalt-Rich Crust was selected as researching content, and the calculation of energy conversion of breaking Cobalt-Rich Crust under loading and unloading conditions was described in detail, and also the specimens of Cobalt-Rich Crust were tested in rock mechanical testing system under the specified stressing paths. From experimental data, the elastic energy, the dissipated energy and the total inputting energy of unloading points were analyzed systematically. The conclusions are as follows: (1) the specimens of Cobalt-Rich Crust are anisotropic rock, and different testing specimens need to load different axial forces to break, and the maximum of axial force is 8KN, and the minimum is 5KN; (2) when increasing the axial force, the elastic energy, the dissipated energy and the total inputting energy of the unloading points increased nonlienearly; (3) Cobalt-Rich Crust is not the same with other ordinary elastic rock, the elastic energy is lower than the corresponding dissipated energy, and with the increasing of the axial force, the difference between two values becomes more and more. © 2016 Springer International Publishing Switzerland


Li L.,Central South University | Li L.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology | Zou Y.-H.,Central South University
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2012

The multi-rigid body dynamical model of the seabed mining vehicle was built using ADAMS/ATV software. The moving control model of the seabed mining vehicle, which is composed of the speed inner loop and orientation outer loop together, was built by MATLAB/Simulink software. And the co-simulation model of the seabed mining combined with the dynamical model and the moving control system together was also built using MATLAB/Simulink software. Due to the complicated and unknown factors on the seabed, the self-adaptive fuzzy controller based on theory of the variable universe was designed to correct the orientation error of the seabed mining vehicle. The speed controller based on the theory of PID was designed to keep the given speed of the seabed mining vehicle. The seabed mining vehicle's co-simulation to keep the linear of the moving path was carried out while it went over the barrier just through the right track. The simulation results show that the seabed mining vehicle's moving control model built by the theory variable universe possesses good robustness, fast and stable response characteristics on two aspects of the orientation error and the speed tracking, and the good effect on tracking the moving along the mining path, thereby the moving along the mining path is realized. And a kind of effective method is supplied to control the seabed mining vehicle to move along the mining path in the ocean mining.


Liu S.,Central South University | Liu S.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology | Li U.,Central South University | Li U.,State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology
Proceedings - 2010 International Conference on Digital Manufacturing and Automation, ICDMA 2010 | Year: 2010

The Heave compensation system is essential for deep-sea mining to extend the operational weather window and improve the operation safety and efficiency. A novel heave compensation system compositely acted by dynamic vibration absorber combined with accumulator is proposed in the light of 5000m deep-sea poly-metallic mining system of China. The composition and working principles of the heave compensation system is presented, and a corresponding mathematical model of this system is built. The main parameters of the heave compensation system are selected. The mass of dynamic vibration absorber, spring stiffness and damping coefficient are calculated and simulated by MATLAB. The performance of the proposed heave compensation system was simulated and analyzed in time domain. The results show that the satisfactory control effectiveness can be obtained in the overall sea state 4 of China's deep-sea mining field. Therefore, the designed passive heave compensation system compositely by dynamic vibration absorber combined with accumulator is able to isolate the pipeline and its deployment platform from the bending loads induced by the vertical motion of deep-sea mining ship in rough seas with high simplicity and less energy consumption. © 2010 IEEE.

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