release DOF in cooperation between plate and beam elements
release DOF in cooperation between plate and beam elements
(OP)
Hi!
I found closed thread named "Attaching Plate Elements to Beam Elements" in which rb1957 wrote something aboute release of a freedom. I'm very interested how to change relationship between plate and beam elements (release chosen DOF). My construction is 3d frame, and roof (plate elements) can't be part of load-bearing structure. Look at the picture below.

I want to release all rotational degrees and some translation degrees along chosen curves.
I don't know how to do it. I really appreciate any tips and tricks.
Regards!
I found closed thread named "Attaching Plate Elements to Beam Elements" in which rb1957 wrote something aboute release of a freedom. I'm very interested how to change relationship between plate and beam elements (release chosen DOF). My construction is 3d frame, and roof (plate elements) can't be part of load-bearing structure. Look at the picture below.

I want to release all rotational degrees and some translation degrees along chosen curves.
I don't know how to do it. I really appreciate any tips and tricks.
Regards!





RE: release DOF in cooperation between plate and beam elements
you can ignore the problem, and the beam will be bending under the shell, as though there's a uni-joint between them.
you can RBE the beams to the solids, which'll weld them together.
you can release the beam bending, so the beam elements will have zero moment at the shell.
another day in paradise, or is paradise one day closer ?
RE: release DOF in cooperation between plate and beam elements
Plate elements which are part of roof should work independently of frame structure.
Actually I use this plate elements only to transfer area loads on load-bearing structure (wooden frame).
When I release beam bending, then I get rod element but that's not what I want.
RE: release DOF in cooperation between plate and beam elements
You can release DOF at ends of beam elements, this is named the PIN FLAG feature, take a look to the CBAR/CBEAM elemenst in the NX NASTRAN manuals to understand how it runs.
Also, you have an example explained in my web site in the following address (in Spanish, of course -- use GOOGLE Translator):
http://www.iberisa.com/soporte/femap/cbar.htm
Best regards,
Blas.
~~~~~~~~~~~~~~~~~~~~~~
Blas Molero Hidalgo
Ingeniero Industrial
Director
IBERISA
48004 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog de FEMAP & NX Nastran: http://iberisa.wordpress.com/
RE: release DOF in cooperation between plate and beam elements
To do it with Femap for Bar / Beam elements go to Modify/Update Elements/ Beam/Bar Releases
Seif Eddine Naffoussi, Stress Engineer
www.Innovamech.com
33650 Martillac û France