Analytical and Numerical Modeling for Flexible Pipes

Abstract：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. 作者： Author： WANG Wei  CHEN Geng 作者單位： College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China 期 刊： 中國海洋工程（英文版）   ISTICEISCI Journal： China Ocean Engineering 年，卷(期)： 2011, 25(4) 分類號： U173 Keywords： unbonded flexible pipes    effective elastic modulus    isotropic    orthotropic    carcass layer    helical layer    機標分類號： TV1 TU3 機標關鍵詞： Flexible Pipes    finite element model    flexible pipes    effective    axial force    application    literature    structure    practical    influence    results    terms 基金項目： the 111 Project of China，State Key Laboratory of Ocean Engineering of Shanghai Jiao Tong University，the Fundamental Research Funds for the Central University Analytical and Numerical Modeling for Flexible Pipes[期刊論文]  中國海洋工程（英文版） --2011, 25(4)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 orthotrop...

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