Direct cylic
Direct cylic
(OP)
Hello,
I wanted to know if anyone here could explain the direct cyclic theory on abaqus. So I read the abaqus documentation and wanted to know more about the direct cyclic algorithm. I was wondering if anyone could explain to me what goes on and how abaqus obtaines a solution. I believe the documentation explains little on direct cylic in section 2.2.3 in the theory manual.
I wanted to know if anyone here could explain the direct cyclic theory on abaqus. So I read the abaqus documentation and wanted to know more about the direct cyclic algorithm. I was wondering if anyone could explain to me what goes on and how abaqus obtaines a solution. I believe the documentation explains little on direct cylic in section 2.2.3 in the theory manual.





RE: Direct cylic
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RE: Direct cylic
RE: Direct cylic
RE: Direct cylic
Two fields are at play: displacement and force. And, for convergence during an iterative algorithm, ABAQUS requires the displacement correction and force residual to be below a limit. And these increments are simply expressed as Fourier series expansions, whose coefficients must be determined for the iteration to proceed.
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RE: Direct cylic
RE: Direct cylic
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RE: Direct cylic
RE: Direct cylic
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RE: Direct cylic
RE: Direct cylic
Now, direct cyclic analysis is NOT a transient analysis. It is, in fact, a quasi-static analysis. The displacement solution for the first increment is for ALL TIMES throughout the "cyclic" loading. So, you do not want to think in terms of cycles of loading.
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RE: Direct cylic
RE: Direct cylic
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RE: Direct cylic
RE: Direct cylic
By the way, you must avoid nonlinearities in a direct cyclic analysis.
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RE: Direct cylic