I found in the manual that the ELBOW command will convert straight PIPE289 elements to ELBOW290 "where it is beneficial". I would like some more information on this: What are the conditions for when it is considered beneficial and elements are converted?
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Under the following conditions, pipe to elbow transitioning will done: 1) A straight pipe289 element is next to a curved pipe289 element 2) The section ID's of the 2 adjacent elements are the same 3) The tangents of the 2 elements at the shared node are within 1 degree. When a transition region is determined, the algorithm marches out along the straight region and converts 289's to 290's until a distance of 2 pipe diameters is exceeded. The curved regions will typically have cross-section deformation. We transition these elements so the cross-section deformation can continue into the adjacent straight region. |
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