子结构位移迭代法修正软管空间形态

为解决四点约束问题,根据非线性有限元理论和Newton-Raphson荷载增量法结合集矿机运动产生的动约束边界条件,首先计算出软管在两个真实边界点约束下的空间构型。然后将两点约束的软管构型数值解作为四点约束问题的初始条件,采用子结构位移迭代法,对两点约束的软管空间形态进行修正,从而使软管的空间曲线通过实测的四点。这样,深海采矿实时动态跟踪软管的空间方位测量技术能融入有限元理论计算。

THE MODIFICATION ON SPACE CONFIGURATION OF FLEXIBLE PTPE BY THE SUB-STRUCTURE DISPLACEMENT ITERATION METHOD

This paper aims to solve four-point constraint problems. To do that, this paper adopts nonlinear finite element method and Newton-Raphson incremental load-step method, and employs mobile boundary constraint conditions corresponding to the motion of mine-collecting machine. The space configuration of flexible pipes has firstly been computed under real boundary two-point constraints. Then it is modified by the displacement iteration method of sub-structure so that it matches the measured result under four-point constrains. Therefore the on-line dynamic measuring technique of the space orientation of flexible pipes for deep sea mining can be combined with the finite element computation.