非金属智能连续管拉伸层力学特性研究

Study on the Mechanical Properties of the Tensile Layer of Non-Metallic Intelligent Coiled Tubing

复合材料连续管是连续管的重要发展方向之一。在非金属智能连续管内植入辅助线缆,会对拉伸层结构的力学特性造成影响,必须通过合理的结构设计来保证拉伸层结构的力学性能。鉴于此,针对非金属智能连续管结构中的拉伸层,基于ABAQUS软件开展拉伸层典型结构有限元建模,采用数值仿真分析其力学特性,并讨论了拉伸层相关参数对典型结构力学特性的影响规律。分析结果表明:在拉伸层结构中,增加光纤信号线对其力学性能影响较小;增大增强带宽度能够明显提高其刚度特性;当缠绕角度小于50°时,增大缠绕角度将降低其刚度特性,当缠绕角度大于50°时,继续增大缠绕角度对拉伸层刚度特性的影响十分有限。研究结果可以为非金属智能连续管的设计和使用提供技术借鉴。

Composite material coiled tubing is one of the important development directions of coiled tubing.The implantation of auxiliary cables in non-metallic intelligent coiled tubing will affect the mechanical properties of the tensile layer structure.The mechanical properties of the tensile layer structure must be ensured through reasonable structural design.Aiming at the tensile layer in the non-metallic intelligent coiled tubing structure,based on the ABAQUS software,the finite element modeling of the typical structure of the tensile layer is carried out.The mechanical properties of the tensile layer are analyzed by numerical simulation.The influence of the relevant parameters of the tensile layer on the mechanical properties of the typical structure is discussed.The analysis results show that in the tensile layer structure,the increase of optical fiber signal lines has little effect on its mechanical properties.Increasing the width of the reinforcing belt can significantly improve its rigidity characteristics.When the winding angle is less than 50°,increasing the winding angle will reduce its stiffness characteristics.When the winding angle is larger than 50°,the effect of increasing the winding angle on the stiffness characteristics of the tensile layer is very limited.The study can provide technical reference for the design and use of non-metallic coiled tubing.