海底管道铺设分析的子结构方法

Substructure method for analysis of submarine pipeline pipelay

深水S型铺管涉及三维空间的大变形和接触分析,由于收敛速度慢而导致求解困难。为克服这个问题,本文提出了一种子结构方法;通过凝聚托管架内部结点自由度,铺管问题可在二维空间表述和求解。本文方法具有快速收敛的特点,可对铺管问题进行广泛的参数研究。

Deep-water S-Lay of pipelines requires large deformation and contact analysis in three-dimensional space.It is difficult to be solved due to slow convergence rate.To overcome this problem,a substructure method is presented in this paper.By condensing the degrees of freedom of internal nodes of the stinger,the pipelay problem can be formulated and solved in two-dimensional space.This method has the advantage of fast convergence rate and can be used to carry out extensive parametric studies for pipelay problem.