Analytical and Numerical Modeling for Flexible Pipes  

作　　者：王玮 陈耕 

机构地区：[1]College of Shipbuilding Engineering,Harbin Engineering University

出　　处：《China Ocean Engineering》2011年第4期737-746,共10页中国海洋工程（英文版）

基　　金：supported by the "111" Project of China (Grant No. B07019);State Key Laboratory of Ocean Engineeringof Shanghai Jiao Tong University (Grant No. 1008);the Fundamental Research Funds for the Central University

摘　　要：The unbonded flexible pipe of eight layers, in which all the layers except the carcass layer are assumed to have isotropic properties, has been analyzed. Specifically, the carcass layer shows the orthotropic characteristics. The effective elastic moduli of the carcass layer have been developed in terms of the influence of deformation to stiffness. With consideration of the effective elastic moduli, the structure can be properly analyzed. Also the relative movements of tendons and relative displacements of wires in helical armour layer have been investigated. A three-dimensional nonlinear finite element model has been presented to predict the response of flexible pipes under axial force and torque. Further, the friction and contact of interlayer have been considered. Comparison between the finite element model and experimental results obtained in literature has been given and discussed, which might provide practical and technical support for the application of unbonded flexible pipes.The unbonded flexible pipe of eight layers, in which all the layers except the carcass layer are assumed to have isotropic properties, has been analyzed. Specifically, the carcass layer shows the orthotropic characteristics. The effective elastic moduli of the carcass layer have been developed in terms of the influence of deformation to stiffness. With consideration of the effective elastic moduli, the structure can be properly analyzed. Also the relative movements of tendons and relative displacements of wires in helical armour layer have been investigated. A three-dimensional nonlinear finite element model has been presented to predict the response of flexible pipes under axial force and torque. Further, the friction and contact of interlayer have been considered. Comparison between the finite element model and experimental results obtained in literature has been given and discussed, which might provide practical and technical support for the application of unbonded flexible pipes.

关 键 词：unbonded flexible pipes effective elastic modulus ISOTROPIC ORTHOTROPIC carcass layer helical layer 

分 类 号：U173[交通运输工程]