Analysis on nonlinear hysteresis characteristic of unbonded flexible pipes

作者：Wang, Wei; Wang, Hexiao; Sun, Liping

来源：28th International Ocean and Polar Engineering Conference, 2018, Japan, 2018-06-10 to 2018-06-15.

• Flexible pipes
• Friction interfaces
• Nonlinear hysteresis
• Numerical results
• Offshore production
• Production risers
• Technical support
• Unbonded

Flexible pipes, which can be divided into bonded and unbonded types, have been applied in the oil industry for years. An unbonded structure, the so-called flexible steel pipe, can drastically hoist the resistance of the pipe to pressure, tension and torsion and in the meanwhile, could be manufactured in a rather lengthy configuration and therefore, can be served as flowline, jetting line, kill and choke line or production riser, which presents a large interest in offshore production because of the realization of a simple and convenient connection between the seafloor and the surface. In the present paper, the nonlinear hysteresis characteristics of an unbonded flexible pipe under loading has been investigated via finite element (FE) method in which eight layers of the unbonded flexible pipe have been established with the introduction of solid and shell elements to layer-simulation. All the layers are modeled respectively with contact and friction interfaces between adjacent layers. The numerical results, compared with the other literature's results, exhibits good agreement with the other existing results, which verifies the effectiveness and the validity of the given model and furthermore, might provide practical and technical support for the application of flexible steel pipes.

• 出版日期2018
• 单位哈尔滨工程大学