Theoretical and experimental studies of stresses in flexible pipes
Theoretical and experimental studies of stresses in flexible pipes
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DOI：
10.1016/j.compstruc.2011.08.008
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发表时间：
2011-12
影响因子：
4.7
通讯作者：
S. Sævik
中科院分区：
文献类型：
--
作者：
S. Sævik
本文提出了一种由轴对称效应预测应力的模型和两种可供选择的无粘结软管拉伸铠装层弯曲应力的预测公式。这些模型的开发符合非线性有限元技术的框架，允许直接在现有程序中执行柔性立管分析，所有这些都基于允许大位移和小应变的协同运动学。使用光纤Braggs的应变测量进一步进行了实验研究，以验证两种配方在弯曲应力和疲劳方面的性能。
This paper presents one model for predicting stresses from axi-symmetric effects and two alternative formulations for predicting bending stresses in tensile armour layers of non-bonded flexible pipes. The models were developed to comply with the framework of non-linear finite element technology allowing direct implementation into existing codes for flexible riser analysis, all based on corotated kinematics allowing for large displacements and small strains. Experimental studies were further carried out using strain measurements from fibre-optic Braggs to validate the performance of both formulations in terms of bending stresses and fatigue.