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Corner nodes >1 affecting distortional mode results #25

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Lomarandil opened this issue Aug 24, 2022 · 0 comments
Open

Corner nodes >1 affecting distortional mode results #25

Lomarandil opened this issue Aug 24, 2022 · 0 comments

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@Lomarandil
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Lomarandil commented Aug 24, 2022

When I evaluate the constrained distortional mode on shapes (raw-generated or using template_path) which have multiple nodes/elements representing the profile corners, the number of distortional modes 'n_dist_modes' increases (following n_dist_modes = n_r*4-2), and the resulting curve and displaced shape show influence of combined local and distortional modes.

with multiple corner elements:
image
image

with n_r=1 (no corner elements)
image
image

If I had to guess, I'd say that the code is struggling to differentiate these corner nodes from "main nodes".

Not sure if that has any effect on physical behavior, but it does make it more difficult to locate the local minimum for distortional buckling.

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