Dynamics of vertical pipe in deep-ocean mining system  

作　　者：禹宏云 刘少军 

机构地区：[1]School of Mechanical and Electrical Engineering, Central South University

出　　处：《Journal of Central South University of Technology》2007年第4期552-556,共5页中南工业大学学报（英文版）

基　　金：Project (DY105-03-02-02) supported by the Deep-Ocean Technology Development Item of China

摘　　要：A 3-D geometrical nonlinear model for the entire lift system of 1000-m sea trial system of China Ocean Mineral Resources R&D Association was established with finite element method.The model was utilized to analyze the dynamic characteristics of the vertical pipe under the influence of moving velocity,current direction and wave.The simulation results show that the axial stress is dominant on the vertical pipe,its maximum is located at the pipe top,all stresses are much less than the allowable value of the vertical pipe and joint;the heave motion leads to violent fluctuation of the force and stress,but a period of 8 s is not likely to resonate the present pipe;against the current,0.50 m/s is the suggested moving velocity of the ship and miner,while along the current,the moving velocity can be slightly higher than 0.75 m/s.A 3-D geometrical nonlinear model for the entire lift system of 1000-m sea trial system of China Ocean Mineral Resources R＆D Association was established with finite element method. The model was utilized to analyze the dynamic characteristics of the vertical pipe under the influence of moving velocity, current direction and wave. The simulation results show that the axial stress is dominant on the vertical pipe, its maximum is located at the pipe top, all stresses are much less than the allowable value of the vertical pipe and joint; the heave motion leads to violent fluctuation of the force and stress, but a period of 8 s is not likely to resonate the present pipe; against the current, 0.50 m/s is the suggested moving velocity of the ship and miner, while along the current, the moving velocity can be slightly higher than 0.75 m/s.

关 键 词：deep-ocean mining DYNAMICS vertical pipe finite element method geometrical nonlinearity 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]