深海柔性立管弯曲加强器力学建模及参数敏感性分析  

Mechanical Modelling and Sensitivity Analysis of Bending Stiffeners of Deep-sea Flexible Riser

作　　者：李冠军 姜冬菊[1] 黄丹[1] LI Guan-jun;JIANG Dong-ju;HUANG Dan(College of Mechanics and Materials,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学力学与材料学院,南京211100

出　　处：《科学技术与工程》2020年第11期4210-4215,共6页Science Technology and Engineering

基　　金：国家重点研发计划(2018YFC0406703);国家自然科学基金(11132003);中央高校基本科研业务费(2017B13014)。

摘　　要：柔性立管系统在深海资源开发中使用越来越广泛。弯曲加强器作为立管系统的重要构件,其设计和研究对立管系统在复杂工况下的正常作业有着十分重要的意义。同时考虑材料的非线性力学行为、几何大变形,以及弯曲加强器与立管之间的接触摩擦,建立典型三段式弯曲加强器-立管系统的三维非线性力学模型,并与工程常用线性简化模型结果进行对比,说明非线性力学建模的必要性。在此基础上,通过非线性计算对典型三段式弯曲加强器的关键结构设计参数进行敏感性分析。结果表明,弯曲加强器的各段长度比例、厚度等结构参数对系统工作性能都有一定影响,在弯曲加强器设计时应给予充分考虑。Flexible riser system has been more and more widely used in deep-sea constructions. As an important component of riser system, the design and research of bending stiffener are of great significance to guarantee the capability and safety of the riser system under complex working conditions. A three-dimensional non-linear model for the typical three-segment-typed bending stiffener and riser system was established considering the nonlinear constitutive law, the large deformation, as well as the contact, friction, and clearance between the bending stiffener and riser. The necessity of the nonlinear model was verified by comparing the nonlinear results with those by using simplified linear model. Based on the proposed nonlinear approach, the sensitivity of the key structural parameters of typical three-segment-typed bending stiffener was analyzed additionally. Results show that the structural geometric parameters including the length ratio and thickness of each section of the bending stiffener affected the work capacity of the riser system at a certain point, which shall be considered in design of the bending stiffener in the future.

关 键 词：深海柔性立管 弯曲加强器 几何非线性 Mooney-Rivlin模型 参数敏感性 

分 类 号：O343.5[理学—固体力学]