摘要
由于受海流及采矿船的拖航作用,深海采矿扬矿管会发生大偏移,这属于几何非线性问题。将扬矿管简化为非线性梁单元,利用T.L.描述方法建立了有限元模型,运用能量法推导了刚度矩阵,给出了液动力的计算方法及增量步内的Newton-Raphson迭代求解方法。分析了不同拖航速度、缓冲矿仓质量以及扬矿管与采矿船连接方式对扬矿管偏移的影响。计算结果表明,拖航速度和缓冲矿仓质量对扬矿管偏移有很大影响,而扬矿管与采矿船的连接方式对扬矿管的偏移几乎没有影响。为采矿系统的合理设计提供了理论分析方法和设计依据。
Deep ocean mining pipe has large deflective displacements because of ocean currents and the drawing of the mining vessel, which is a geometric nonlinear problem. The lifting pipe is simplified as nonlinear beam elements, the finiteelement modeling is built by menas of T. L. method, the rigid matrix is deduced by means of energy method, and the calculating method of hydrodynamic force and the Newton-Raphson iterative method in incremental step are presented. The effects of the different drawing velocities of the mining vessel, the weight of the buffer and joining methods between the pipe and the vessel on deflective displacements of the lifting pipe are analyzed. Calculating results show that drawing velocities of the mining vessel and the weight of the buffer have a great influence on deflective displacements of the lifting pipe, while the joining methods between the pipe and the vessel have little influence on deflective displacements. A theoretical analytical method and a designing basis for the reasonable design of the deep ocean mining system are provided.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2002年第8期94-99,共6页
Journal of Mechanical Engineering
基金
国家长远发展'九五'计划基金(DY95-03-22)资助项目
关键词
深海采矿
扬矿管
非线性有限元法
液动力
偏移
Deep ocean mining Lifting pipe Nonlinear finite element method Hydrodynamic force
