심해저 집광시스템 진수 시뮬레이션

Abstract

This paper concerns about coupled dynamic analysis of deep-seabed mining system in the launching operation. The dynamic behavior of mining system consisting of lifting pipe, buffer station, flexible conduit and self-propelled miner is simulated in time domain. The launching operation is divided into four critical phases: (1) deployment of miner and flexible conduit, (2) deployment of lifting pipe, flexible conduit and miner, (3) touch-down of miner, (4) final launching. The dynamic responses of sub-systems – miner, flexible conduit, buffer and lifting pipe – are analyzed in each launching phase. According to the changing period of forced excitation at the top, the dynamic responses of subsystems are diverse in their characteristics. It has been shown that the total integrated responses of sub-systems are strongly affected by the design parameters. Especially, the principal dimensions of flexible conduit seem to be significant in determining of the global response. Based on the simulation results, safe operation conditions are investigated.