Xu Guo-Min, Shuai Chang-Geng
Institute of Noise and Vibration, Naval University of Engineering, Wuhan, 430033, China.
National Key Laboratory on Ship Vibration and Noise, Wuhan, 430033, China.
Sci Rep. 2021 Mar 15;11(1):6043. doi: 10.1038/s41598-021-85326-y.
Filament-wound flexible pipes are widely used to transport fluid in pipeline systems, proved extremely useful in marine engineering. The hyperbolic flexible pipes have good vibration suppression performance, but they are easily deformed under internal pressure. This paper focuses on the stability of hyperbolic flexible pipes based on the composite Reissner shell theory and the transfer-matrix method. The nonlinear stretch of the reinforced filament and the fiber bridge effect are considered in the model. The calculation results show that a large winding angle reduces the deformation and the meridional stress. The available initial winding angle is limited by the geometry and the slippage coefficient of flexible pipe. The reinforced filament of high tensile modulus will reduce the deformation of the pipe. Compared with the geodesic winding trajectory, non-geodesic winding trajectories improves the stability of the pipe. The theoretical result is verified by the finite element analysis. The investigation method and results present in this paper will guide the design and optimization of more novel flexible pipes in the future.
纤维缠绕柔性管道广泛应用于管道系统中的流体输送，在海洋工程中被证明极为有用。双曲线柔性管道具有良好的减振性能，但在内压作用下容易变形。本文基于复合赖斯纳壳体理论和传递矩阵法，研究双曲线柔性管道的稳定性。模型中考虑了增强细丝的非线性拉伸和纤维桥接效应。计算结果表明，较大的缠绕角可减小变形和子午向应力。可用的初始缠绕角受柔性管道的几何形状和滑动系数限制。高拉伸模量的增强细丝将减小管道的变形。与测地线缠绕轨迹相比，非测地线缠绕轨迹提高了管道的稳定性。有限元分析验证了理论结果。本文提出的研究方法和结果将为未来更新型柔性管道的设计和优化提供指导。
