Analytical and numerical modeling for flexible pipes
Analytical and numerical modeling for flexible pipes
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DOI：
10.1007/s13344-011-0059-9
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发表时间：
2011-12
影响因子：
1.6
通讯作者：
Wen Wang;Geng Chen
中科院分区：
文献类型：
--
作者：
Wen Wang;Geng Chen
本文分析了八层无粘结柔性管，其中除骨架层外的所有层假定为各向同性。具体地，胎体层显示正交各向异性特性。根据变形对刚度的影响，推导出胎体层的有效弹性模量。考虑有效弹性模量的影响，可以对结构进行合理的分析。研究了钢筋束在螺旋铠装层中的相对运动和钢丝的相对位移。建立了柔性管道在轴向力和扭矩作用下的三维非线性有限元模型。进一步考虑了层间摩擦和接触问题。将有限元模型与文献中的实验结果进行了对比分析，为无粘结柔性管道的应用提供了技术支持。
The unbonded flexible pipe of eight layers, in which all the layers except the carcass layer are assumed to have isotropic properties, has been analyzed. Specifically, the carcass layer shows the orthotropic characteristics. The effective elastic moduli of the carcass layer have been developed in terms of the influence of deformation to stiffness. With consideration of the effective elastic moduli, the structure can be properly analyzed. Also the relative movements of tendons and relative displacements of wires in helical armour layer have been investigated. A three-dimensional nonlinear finite element model has been presented to predict the response of flexible pipes under axial force and torque. Further, the friction and contact of interlayer have been considered. Comparison between the finite element model and experimental results obtained in literature has been given and discussed, which might provide practical and technical support for the application of unbonded flexible pipes.