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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。
Owing to the towage by ocean currents and mining vessels, the deep-sea mining pipe will have a large offset, which is a problem of geometric nonlinearity. The lifting pipe is simplified as a nonlinear beam element. The finite element model is established by using T.L. description method. The stiffness matrix is deduced by the energy method. The calculation method of the hydrodynamic force and the Newton-Raphson iterative method in incremental step are given. The effects of different towing speed, buffer silo quality and the connection of lifting pipe and mining vessel on pipe drift were analyzed. The calculation results show that the speed of towing and the quality of the buffer silo have a great influence on the drift of the pipe, while the connection between the pipe and the mining vessel has almost no effect on the pipe migration. It provides theoretical analysis method and design basis for the reasonable design of mining system.