FLUTTER 1

[Pshell90]

Hi guys!

I'm working on flutter phenomena. Does anyone know anything about that ?! I have a big problem with that !!

 

[FastMouse]

I'm pretty sure that the best place to start is the author's preface.

 

[rb1957]

flutter is divergent aeroelastic. surely you can get some hits in google with some obivous search terms ... like "flutter" ...

 

[thruthefence]

It'll kill ya!

 

[Pshell90]

Thank you guys !!

Is there anyone here who has ever made a flutter model in PATRAN/NASTRAN ?!

 

[rb1957]

starting at post #1, going directly onto post #2 is IMHO pretty dangerous. I'd suggest some pretty heavy "book hitting" before proceeding onto modelling in NASTRAN (or any other code !).

what are you looking at ? a wing, and empennage, an antenna ?

 

[WKTaylor]

Starter material...

http://www.dtic.mil/dtic/

search for ADA328059
WL-TR-96-3111
Flutter Prevention Handbook: A Preliminary Collection.

Regards, Wil Taylor

Trust - But Verify!

We believe to be true what we prefer to be true.

For those who believe, no proof is required; for those who cannot believe, no proof is possible.

 

[Pshell90]

Thanks guys !! your suggestion was really helpful !!

I just wanna model a simple sandwich beam & then evaluate its flutter velocity !

Here I faced to 2 problems :

1. How can I evaluate the other modes for my beam ? because I think that NASTRAN/PATRAN just check the 1st mode for flutter,doesn't it ?! Please let me know if I'm wrong !

2. Which mode does flutter usually happen in sandwich beams in ?

I really got confused !!! Please help me !!!

Thank you all in advance.

 

[KENAT]

Are you sure you mean flutter? Or do you mean vibration/natural frequency or some such?

For use of a specific computer package you may want to find the relevant forum, should be able to get there from below link.

http://www.eng-tips.com/threadcategory.cfm?lev2=22

Posting guidelines faq731-376

http://eng-tips.com/market.cfm?

(probably not aimed specifically at you)
What is Engineering anyway: faq1088-1484​

 

[Pshell90]

Yes !! I'm sure. That's flutter and flutter velocity & frequency .

I want to model it in PATRAN/ NASTRAN!