Three dimensional analysis on behaviour of mining pipe of deep seabed mineral resources

Abstract

A dynamic simulation model of a vertical pipe has been developed for the purpose of investigating three-dimensional dynamic behaviour of a ocean mining pipe. Dynamics of vertical pipe string is modeled by the modified Kirchhoff's beam theory including large deflections and nonlinear viscous drag forces. A lumped-mass method is developed for numerical analysis of 3-D nonlinear pipe behaviour. 3-D nonlinear simulations of a vertical mining pipe are carried out in time-domain by using the Newmark-β method. Effect of underwater pump modules and buffer on the dynamics of pipe string is investigated.