轴对称循环载荷作用下非黏结柔性管力学特性研究OA

To investigate the mechanical behavior of unbonded flexible pipes under axisymmetric cyclic loading,this study accounts for nonlinear effects including large structural deformations,interlayer con-tact between multiple layers,and interlayer friction.A complete structural model of an eight-layer un-bonded flexible pipe was established using the ABAQUS finite element analysis software.The structural deformation characteristics of the flexible pipe under two types of axisymmetric cyclic loading,axial ten-sion-compression cyclic loading and bidirectional torsional cyclic loading,were studied along with the in-fluence of interlayer friction coefficient on the pipe's mechanical properties under these two loading con-ditions.The results indicate that the load-deformation curves of the flexible pipe under axisymmetric cy-clic loading exhibit hysteretic characteristics.Both the deformation characteristics of the tensile armor layer steel strips and the interlayer friction coefficient have a significant impact on the hysteretic behav-ior of the axisymmetric cyclic load-deformation curves.