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Problem Description
In this example a cylinder is analyzed for an internal pressure load. The resulting radial outward displacement, vertical displacement at the top of the cylinder and σ11 stress are compared with hand calculated results based on formulas presented in Roark and Young 1975.
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Two different models are created for the analysis. The models are identical except for the shell element mesh. Model A uses an 8x16 mesh (height x circumference) and Model B used a 24x48 mesh.
Tested Features
- Three-dimensional analysis using shell elements
- Surface pressure load applied to shell elements
- Joint local axes
Result Comparison,
App Link:
https://openbrim.org/objidqkwwq6hmntralc6rvl13qj.project
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Output Parameter | Model And Mesh | OpenBrIM | SAP2000 | Independent | Percent Difference (SAP2000 vs Independent) | Percent Difference (OpenBrIM vs Independent) |
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| U1 (at any jt) in | A 8X16 | 0.3786 | 0.12175 | 0.12414 | -1.9% | 67.21% |
| U3 (at top jt) in | A 8X16 | -0.1995 | -0.12175 | -0.12414 | -1.9% | 37.76% |
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