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Flutter modeling in PATRAN

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Pshell90

Pshell90

Aerospace
Aug 11, 2012
18
Is there anyone here who has ever made a flutter model in PATRAN/NASTRAN ?! I really need help ?
 
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give a short introduction of your problem that maybe I can give you some instructions.
 
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I want to model a composite beam in PATRAN & calculate flutter features.
first of all, I have a problem with geometry of beam in PATRAN in aeroelasticity modulus. because it is 1-D, there is a serious problem for coupling structural mesh to aerodynamic mesh with spline. Because for aero grids the software needs elements and I can not select any elements with beam geometry .
Then I used shell instead of beam. I could validate flutter velocity with %0.5 difference, but the flutter frequency is wrong.

Please help me what to do.
 
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