16MnR and 45# steel are taken as examples. The obtained results have been applied to analyze the safety of operation pressure and rationality of design of a kind of engineering structure-a flange joint of hemispherical head to cylindrical shell. Try to seek a sort of new method to assessment the capability of structure to load beyond the traditional method which regards stress and strain as main parameters.
(4)Using a FE program based on Plantle-Ressue theory to calculate some mesomechanical parameters, a flange joint structure of a high pressure vessel (Design pressure 31.4MPa and the thickness of the hemispherical head is half of that of shell.)
Based on the plastic mechanics,This paper analyses the drawing process of large scale thick wall hemispherical primary head and obtained the corresponding law of wall thickness and radial size between plate blank and the product It has been proved by the test that the result get from the theory is in accordance with the practical value Moreover,the paper has much reference value on the choice of technologic parameter,design of dies and the improvement of manufacture level
An experimental device of semi spherical head large opening inner extruded nozzle,with design pressure 5MPa,opening ratio d i/D i=0.6,length of inner extruded nozzle 20mm,was buiet. By means of electric measuring method,at the experimental pressuree of 3MPa,3.5MPa and 4MPa etc. The experimental stress of connection zone between head and inner extruded nozzle was analized.
The finite element stress analysis caculation for the joint structure between the spherical head and the tube of the heavy duty hydrogenation reactor has been performed in this artical, and the detail stress analysis for two structuarl types of the semi spherical head and spherical notch head has been performed as well by taking 04400 heavy duty hydrogenation reactor as an example ,thus a reasonable structure has been found out,which offers the reliable basis for the design of the hydrogonation reactor.