PR1型聚乙烯缠绕结构壁管的环刚度计算方法研究

聚乙烯缠绕结构壁管的环刚度是其抵抗径向变形的重要性能参数,影响着其外压承载能力。以PR1型截面的埋地聚乙烯缠绕结构壁管为例,对管道轴向截面进行截面单元划分,同时,综合考虑截面发生变形、局部材料迁移等情况,建立截面单元的简化计算模型,并对截面单元关键尺寸参数进行修正。在此基础上,研究PR1型聚乙烯缠绕结构壁管环刚度的计算方法;通过实例验证了PR1型聚乙烯缠绕结构壁管的截面单元的形心、惯性矩以及环刚度计算方法的准确性,相关研究方法与结果将对聚乙烯缠绕结构壁管的设计、生产与使用以及其他复杂截面管道的环刚度计算提供一定的参考作用。

Research on Ring Stiffness Calculation Method of Polyethylene Winding Wall Pipe with PR1 Section

Ring stiffness of polyethylene winding wall pipe is an important performance parameter to resist radial deformation, and it affects bearing capacity of external pressure. Taking the buried polyethylene winding wall pipe with PR1 section as an example, the section elements of the pipeline axial section are divided, and the deformation of cross section and local material migration are considered comprehensively to establish the simplified calculation model and modify the key dimension parameters of section element. On this basis, the calculation method of ring stiffness of polyethylene winding wall pipe with PR1 section is studied. The accuracy of the calculation method of the centroid, moment of inertia and ring stiffness of the section element of polyethylene winding wall pipe with PR1 section is verified by an example, and the related research methods and results will provide some reference for the design, production and use of polyethylene winding wall pipes and the calculation of ring stiffness of other complex cross-section pipes.