支座位移非线性迭代法确定软管平衡形态

在海洋工程计算领域软管空间形态的非线性分析是特别复杂的课题，更加困难与令人易于受挫的研究方向是寻求软管在各种外荷载作用下软管的平衡形态。本文通过支座位移非线性迭代法结合空间梁结构非线性有限元分析理论加Newton-Raphson荷载增量法成功地解决了这一问题，并进行了相关的实验研究。边界条件考虑了固端约束与铰支约束，浮力既可分布作用也可集中作用在软管的任意位置。计算结果表示本文理论的正确性，在工程应用上具有重要的意义。

Determination of the Equilibrium Configuration of Flexible Pipe with Nonlinear Iterative Method by Moving Support Constraint

The nonlinear analysis of space configuration of flexible pipe structure is especially complicated, the more perplexing and frustrating research direction is to find an equilibrium configuration of flexible pipe structure under complicated external loads. This paper presents the nonlinear iteration method of compeling displacement of boundary support, which can succeed flexibly in finding equilibrium configuraition under complicated external loads. For the solution , a combination of Newton-Raphson nonlinear iteration and load-step incrementation is used. The boundary conditions treated in this paper include fixed or hinged constraints. Buoy force can be distributed over or concentrated at any position of flexible pipe.