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Dear all, I am trying to run a static coupled analysis on a uniform beam model with lumped masses. I consider gravity effect and a non-zero angle of attack. Under these conditions, I could not obtain a converged solution, even for a large number of load steps. I observed in some cases a "constant" residual with aerodynamic forces oscillating between two values (Case 1). In other cases, the residuals evolution exhibits a periodic pattern which is also reflected in the evolution of aerodynamic forces (Case 2). (Case 1) (Case 2) Thank you in advance for your help ! Florian |
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Hi Florian, From some quick investigation, it seems that adding the following setting helps SimInfo.solvers['AerogridLoader']['aligned_grid'] = False This is needed as you have large torsional deformation, which makes the aligned grid no longer be appropriate. |
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Hi Ben, Thank you very much for your quick response ! I can confirm that it works correctly when using this parameter for the analysis. Florian |
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Hi Florian,
From some quick investigation, it seems that adding the following setting helps
SimInfo.solvers['AerogridLoader']['aligned_grid'] = False
This is needed as you have large torsional deformation, which makes the aligned grid no longer be appropriate.