It is well known that the installation loads during offshore pipeline installation are usually higher than the operation loads. Fibre-reinforced plastic (FRP) materials for offshore pipeline applications seem to be very promising due to their high strength, light weight and excellent corrosion and fatigue resistance. However, during S-lay installation, high bending stresses that may cause material failure or buckling take place. Due to the anisotropic nature of multi-layered FRP pipelines, the permissible bending curvature is difficult to estimate. Few published works have proposed a framework for bending stress calculations and those that have provide complex equations that are not convenient for use. In this study, an open numerical code in Mathematica is offered for the first time. Numerical results for S-lay installation of representative pipelines are provided and commended.

中文翻译：

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海上S型铺设纤维增强聚合物管道安装的计算机辅助设计

众所周知，海上管道安装时的安装载荷通常高于运行载荷。用于海上管道应用的纤维增强塑料 (FRP) 材料似乎非常有前途，因为它们具有强度高、重量轻以及出色的耐腐蚀性和抗疲劳性。然而，在 S 型铺设安装过程中，会产生可能导致材料失效或屈曲的高弯曲应力。由于多层 FRP 管道的各向异性特性，允许的弯曲曲率很难估计。很少有发表的作品提出弯曲应力计算的框架，并且那些提供了不方便使用的复杂方程的作品。在这项研究中，首次提供了 Mathematica 中的开放数值代码。