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Angular deformation as a result of weld defects , internal pressure , can cause considerable stress and strain concentration , destruction of the container occurs . The existing spherical angular distortion of many , although they are of the same , but for various reasons , they are not enough precision is not applicable in all cases . Moreover, there is no research on the impact of the various parameters of the spherical angular deformation stress . In addition , there is no study of the angular distortion of the drum - inclusive . Previous studies a summary of them did a comparison with the parameter variation and its representative --- vector Tiansan Wei style and Pan Chao analyzed to identify their defects . This article also uses the theory of law , derived the axisymmetric shell angular distortion differential equations . In this study, by means of the finite element calculated by the angular distortion of the lap , drum kits type outer convex and inner concave form , draw , small spherical tanks of various angular distortion stress coefficient Kt with ball tank diameter D, wall thickness t , height e angular distortion and spherical tank pressure P of the variation of the parameters , and the corner of the stress distribution along the cross-sectional direction of the curve of the deformation zone and along the thickness direction of the additional bending stress distribution and, ultimately, come to lap additional bending stress coefficient Ke outer convex and drums of the drum - inclusive package type concave isometric deformation and stress coefficient Kt is calculated , finally, get a large model the measured angular distortion of the same model 1 m measured height the obtained angular deformation height conversion between .
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