Interaction of Fluid-solid Coupled Flexible Hose And Mining Machine In Deep-ocean Mining System

Interaction of fluid-solid coupled flexible hose and mining machine in a 1000m deep-ocean mining system is studied based on nonlinear finite element method with fluid-solid coupling model. Effect of the walking paths (e.g. line, circle and square) and walking velocities of the mining machine on the space configuration, support restrained force and maximum tensile stress of the flexible hose is investigated in order to provide guidance for the deep-ocean mining operation. Results show that the line walking of the mining machine is better for small lateral displacement, maximum tensile stress and support constrained force of the flexible hose than the circle and square walking. The walking velocities of the mining machine should be limited to an appropriate range (about 0.2-0.4m/s when the lifted speed of inner fluid is 4m/s) for the safety and efficiency of the mining operation.