The Design And Optimization Of Ultra-high Pressure Vessel Based On FEM

In recent years, with the application of ultra-high pressure equipment for the developmentof industrial economy is becoming more common, and because the use environment ultra-highpressure vessel volume also corresponding change for the structure design and the manufactureprocess of container, etc. In this paper, through a large number of literatures related literature,the development of ultra-high pressure vessel background have a deep understanding,manufacturing process, on the basis of detailed elaborated various applied theory of containerdesign, contains the theory of elasticity formula derivation, the elastic-plastic theory principle,multi-layer shrinkable sleeve and autofrettage technology, etc. According to the multi-layershrinkable strength theory, deduced the calculation formula of optimum diameter ratio and bestover surplus quantity of the double shrinkable container; According to the comprehensivestress along the thickness direction of the cylinder from the principle of minimum ofautofrettage treatment container to determine the best radius of elastic-plastic interface of thetheoretical calculation formula is put forward. These theoretical analytic is the basis of theanalysis of finite element method for the next step in this paperIn this paper used finite element method for ultra-high pressure double shrinkable sleevecontainer and autofrettage vessel on stress analysis, used the ANSYS software as thesimulation tools. By comparing stress analysis in the absence of an autofrettage process singlecontainer with double reduction set of containers as well as the autofrettage treatment of thesingle container. The autofrettage technology can effectively improve the bearing capacity ofthe super high pressure vessel, reduce the cyclic stress amplitude and mean stress, theequivalent stress distribution along the thickness direction is more uniform and and improvematerial utilization ratio. Compared with the analytical method, the finite element method hasquick computing speed, data analysis scope broad, more reliable, etc. Using the zero order and first order optimization method respective to set up the finiteelement model of three-shrink sleeve containers, calculate the global stress of multilayershrinkable sleeve container based on FEM, compiling APDL parametric language achieved thebest design strategy and the optimal results. This optimization method not only overcomes thelimitations of more combination sleeve layers with large mathematical processing difficultiesand adopts the form of more complex closer to the actual situation of the equivalent stress ofthe fourth strength theory, leading to it has the fast convergence speed and has the accuratereliable result.Putting forward a set of efficient experimental strategy in order to carry out the releranthydraulic self-reinforced experiment with the strong support of KeFa Ltd conducted out theenhancement in the process of thick wall cylinder outer wall surface circumferential strainexperiment, verified the consistency of the theory of elastic bearing pressure and experimentaldata, This experiment for the pressure vessel tangential strain measurement provides effectivefeasible method, it has widely used in similar experimental engineering value.In this paper, basis on the type ultra-high pressure vessel of Ke Fa company, using thefinite element method and ANSYS software for ultra-high pressure vessel structure designsimulation and optimization design of multi-layer shrinkable sleeve provides a theoreticalguidance, it may provide the basis of innovation for the structure of ultrahigh pressure vessel.