Refinement of Out of Circularity and Thickness Measurements of a Cylinder for Finite Element Analysis
Defence Science and Technology Group Fishermans Bend Victoria Australia
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The as-built out-of-circularity OOC deviations from a perfectly round shape and plate thickness variations of a cylinder that issubjected to external pressure are known to have a significant effect on the collapse strength and must be accurately represented infinite element analysis to obtain accurate results. Often it is necessary to interpolate measurements from a relatively coarse grid to arefined finite element model and methods that have wide general acceptance are Fourier series and bi-linear interpolation. Thesemethods have been implemented in an Excel spreadsheet to produce node and element data that can be used directly in the Strand7finite element package, but the methods employed are suitable for other software as well.