Linkage characteristics of deep-sea mining lifting system

Abstract

In this article, based on the dynamic response of the mining ship and the mining machine in different linkage modes, the virtual prototype model of the ore lifting system and the pipeline system load model in the marine dynamic environment are established. Under different excitation environments, the motion response, dynamic response and spatial configuration characteristics of the ore lifting system under different linkage speeds and different linkage directions of the mining ship and the mining machine are studied. The results of the research demonstrated that the sinking motion of the mining machine is stimulated, and the sinking response amplitude of the submersed warehouse is on the rise as the length of the pipeline increases. The heave response curve of the submersed warehouse is not strictly a simple harmonic motion but fluctuates up and down in a similar period as the mining ship. The nodal force at the connection between the submersed warehouse and the hard tube in the pipeline system increases with the increase of the mining ship's heave amplitude. With the growing linkage speed, the maximum value of the displacement deviation of the trajectory of the submersed warehouse increases in proportion to the speed. The linkage direction of the mining system has little effect on the movement offset of the submersed warehouse, and the horizontal linkage is more conducive to the stability of the slurry conveying hose system than the vertical linkage.