Research On High Pressure FRP Pipes In-situ Modeling Thermal Numerical Simulation And Process Monitoring

Fiber winding thermosetting high-pressure glass pipe prop possesses advantageswhich are higher than strength and stiffness, easy molding, designable and so on.These features enabled it to be used widely in area of aerospace, military, civilengineering, energy transmission, pressure vessels and other fields; it has made hugebenefits of economy and society. Control core mold temperature certainly in thewinding process, in order to keep resin viscosity maintaining within a reasonablerange, so that to enable the resin infiltrated fiber in a better way; to increase contentof pipeline rubber; to enhance the pipeline compactness, to improve performance ofthe pipeline. Thus, it will have an important influence on quality of the products ifa reasonable core mould heating process is adopted in the hot winding process. Thispaper stresses heat winding high-pressure fiberglass pipe production line of pipe inthermal system, it simulates the numerical change of temperature and curing degreefield during the winding and curing process, and this work advances productionengineering from the basis of simulation results.Firstly, this paper analyses operated theory of thermal control system, exploresthe whole structure of the thermal control system, by way of analyzing the internalthermal-chemical kinetics progress in the winding and curding process, to provide atheoretical evidence for the tree value simulation process; Secondly, according to thenumerical simulation of finite element model which is constructed in the thermalcontrol system, using analyzing software of ANSYS, adopting APDL parameterizedesigning language to program numerical simulation procedure, this work simulatedtemperature changing progress of the pipeline surface which is produced through away of traditional constant-temperature heating thermal core winding, analyzed the regulation of outside surface; Thirdly, in order to testing results of numericalsimulation, this passage designed a thermal winding monitoring system based on thePrague optical fiber sensor, it researched the reliability of numerical simulationacross the monitoring results, and enhanced the original curing system based on theseresults; Finally, from the advanced heating progress, it simulated the statistics forshell between winding and curing, analyzed distribution and changing principle oftemperature, curing degree and resin curing reaction heating intensity.In conclusion, this work achieved the numerical simulation of temperature andcuring degree field in producting process, by the means of theoretical working to thethermal high-pressure fiberglass pipe, establishing model and program the numericalsimulation. This research provided a big influence to the design and production ofpipeline.