resonance frequency V beam
resonance frequency V beam
(OP)
Hi people,
I am trying to model the V shape fixed-free beam (view on attachments) with beam dimensions in order to get the resonance frequency.
[link http://files.engineering.com/getfile.aspx?folder=f8744b93-ea3f-4c8b-866e-2f21be3ea0c2&file=beam-shape.png]http://files.engineering.com/getfile.aspx?folder=f8744b93-ea3f-4c8b-866e-2f21be3ea0c2&file=beam-shape.png[/link]
I tried a 2 x (mass spring system) or beam FEA models without success.
Do you have any idea what I have to do?
I am trying to model the V shape fixed-free beam (view on attachments) with beam dimensions in order to get the resonance frequency.
[link http://files.engineering.com/getfile.aspx?folder=f8744b93-ea3f-4c8b-866e-2f21be3ea0c2&file=beam-shape.png]http://files.engineering.com/getfile.aspx?folder=f8744b93-ea3f-4c8b-866e-2f21be3ea0c2&file=beam-shape.png[/link]
I tried a 2 x (mass spring system) or beam FEA models without success.
Do you have any idea what I have to do?





RE: resonance frequency V beam
RE: resonance frequency V beam
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: resonance frequency V beam
I choose a 2 flex beam model with 3 dof by node (2 translation and 1 rotation). Then I wrote down M and K matrix and try to solve det(K-w²M)=0, with computer in the first place, but results are far away from reality??
I do not know how to "model" the bend. Should I add a extra stiffness or torsion moment on node 2 or something like that??
RE: resonance frequency V beam
RE: resonance frequency V beam
"I do not know how to "model" the bend. Should I add a extra stiffness or torsion moment on node 2 or something like that??
"
No, and that question indicates you haven't got the physics right.
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: resonance frequency V beam