To perform a similar type of analysis, consider the following hints and recommendations:
Results accuracy increases as the number of Fourier terms specified increases.
Computational costs also rise sharply as the number of Fourier terms increases.
The ELBOW290 element's KEYOPT(2) setting controls the number of Fourier terms. See the element documentation for more information about specifying an appropriate number of Fourier terms.
To minimize computational costs, use the PIPE289 element to model straight-pipe segments.
If a straight-pipe segment may be subjected to large cross-sectional deformation, the ELBOW290 element is a better choice.
Transition zones (ELBOW) between the curved ELBOW290 and straight PIPE289 elements are generally desirable for obtaining a smooth solution.
Because the ELBOW290 element is based on shell theory, its applicability is limited to pipes with thin to moderately thick walls.