非粘结柔性立管静态分析

Static Analysis of Unbounded Flexible Risers

在变形能原理和能量守恒的基础上,推导出了柔性立管各层的刚度矩阵。将各层刚度矩阵进行叠加,得到柔性立管总体刚度矩阵,并用总体刚度矩阵求解静载荷作用下立管变形响应。同时基于ABAQUS软件建立八层非粘结柔性立管有限元模型,并将有限元计算结果和刚度矩阵计算结果进行比较。分析结果表明:运用推导得到的刚度矩阵求解静态载荷下立管的变形是一种简便且准确的方法。

The stiffness matrix of all layers of flexible risers is derived based on the deformation energy principle and energy conservation. The total stiffness matrix is founded by summing the stiffness matrix of all layers, and the deformations of riser are presented by using total stiffness matrix. The finite element model of the unbounded flexible riser of eight layers is developed by using ABAQUS software. At last, the comparison is made between the analytical and the numerical results for various load cases that include axial, torsional and bending loads. The comparison shows that the stiffness matrix method is a more efficient and accurate way to capture static response of flexible risers.