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explicit analysis critical time-step Ansys
hello,
I am trying to solve a simple cantilever beam (2D) in ansys.
I wish to find out the critical time-step that can be used to explicitly solve a transient problem.
I started with modal analysis to determine the maximum natural frequency of the model. I then computed dt < 2/Wmax.
I use this dt with beta = 0.0 and gamma = 0.25 (Newmark parameters). However the solution is unstable.
I am including my apdl script with this post.
I'd really appreciate if someone could explain why the computed dt does not yield a stable solution in this case.
thanks!
! ---- apdl script attached ----!
Attachment | Size |
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Ansys.txt | 1.78 KB |
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