Research On Mechanical Response Of Steel Wire Reinforced Flexible Hose Under The Combined Effect Of Internal Pressure And Lateral Load

Submarine pipeline is an important part of marine petroleum development. As a composite pipeline consisting of different functional layers, with the advantages of excellent corrosion resistance, flexibility, and easy installation, submarine oil pipeline is gradually applied by foreign countries. In view of the advantage of submarine oil pipeline, steel wire reinforced rubber flexible pipe has been developed by the Chinese rubber industry. Such submarine oil pipeline is different from the flexible pipe of the same name produced, but is a brand-new composite pipeline. Additionally, it has not been really used, for there are gaps in this filed, especially for the research on transverse load. This topic is sourced from Doctor Start-up fund Project of Liaoning Province (L20101089). This research aimed to theoretically analyse transverse load of submarine oil pipeline by using the method of ANSYS simulation. Some conclusions are drawn as follows:(1) Research on constitutive equation of steel wire wound reinforced single-layer is the foundation of the mechanical analysis of submarine oil pipeline. This research applied series parallel model of material mechanics analysis to predict elastic constant of reinforced single-layer. Additionally, this research provided stiffness matrix in the structure of the coordinate system by using coordinate transformation. Furthermore, this research explored the relationship between hose section internal forces and neutral layer strain by using the method, and gained stress-strain relationship in any point of the host.(2)This research built finite element model of steel wire reinforced rubber flexible pipe by using shell63unit and Link8based on ANSYS platform and coupling and constraint equation theory. Additionally, this research explored the impacts of wifldiflg gfigle, Rubber layer, and tube state of being on the process of building model. This research provides a decision basis for the mechanics performance analysis of oil pipeline in the facet of holding internal pressure and lateral load of force.(3)This research tested the correct and rationality of ANSYS simulation by comparing ANSYS simulation result and related hose static load test data. On the basis of ANSYS simulation, this research measured mechanical property of pipe by changing hose steel wire winding angle, internal pressure, transverse load, and allowabl e span length of oil pipeline. Additionally, this research found that internal pressure significantly affected mechanical property of oil pipe. Specifically, Pipeline could be regarded as infinite long hose when allowabl e span length was over6m because hose bend caused by axial tensile deformation could be neglected.