海上建筑非粘结柔性管骨架层径向压溃数值模拟Numerical Simulation of Radial Compression of Non-bonded Flexible Pipe Frame in Offshore Construction
李伟民
摘要(Abstract)：
在工程应用中,由于制造缺陷、张紧器作用等影响,海上建筑非粘结柔性管的骨架层存在一定的初始椭圆度;骨架层主要材质为不锈钢材,其材料弹塑非线性可能对其径向抗压能力产生影响;同时在径向压力作用下骨架层钢片间由于摩擦接触产生相对滑动,也会影响非粘结柔性管结构的径向强度.但现有理论方法忽略其相对滑动,并且不计入初始椭圆度和材料弹塑非线性对压溃失效特性的影响,因此工程应用中误差较大.针对上述缺陷,本文基于通用有限元软件ANSYS,设置三种接触方式,分别对8英寸骨架层进行数值模拟,求解数值模型在理想圆环状态、存在初始椭圆度状态和考虑材料弹塑非线性状态三种情况下的径向位移值,并与理论分析结果进行比较,以研究非粘结柔性管的抗压溃能力,得出相应结论,对工程应用具有一定的借鉴和参考意义.
关键词(KeyWords)： 非粘结柔性管;骨架层;压溃;ANSYS;数值模拟
基金项目(Foundation):
作者(Author): 李伟民
DOI: 10.16393/j.cnki.37-1436/z.20170427.005
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