Surface and wire frame generation, maybe a litte out of topic but.....

[fkd]

Dear Folks,

I have to design a sports arena roof structure that has the geometry composed of two intersecting hyperbolic paraboloids plus an parabolic arch, for the structural system I'm intenting to use the lammela system and the matter is I do have to generate a wire frame for the surface, is there any software that let me input the equations and parameters and have in return the wire frame?

TIA

Fred
~~~Luck and Health For All~~~

 

[fkd]

One more question,

I'm trying to avoid the expensive wind tunnel process for estimating the wind pressures and some time ago I have heard about a fem software capable to analyse fluid flow and other issues related but I don't remember the name and also don't know wheater it's accurate and trustable or not, any comments will be very much appreciated.

Thanks in advance,

Fred

 

[ishvaaag]

I think Autocad or another equivalent able CAD program is the way to go for the first. You can use the SURFTAB and alike orders to build your surface, then using the splines as reference or exploding them you may build either a wire frame model or a triangular surfaces' one. You export whatever as .DXF format and your calculation program shoud be able to import such .DXF file. RISA 3D would take that.

You maybe need not even to work after surftab, maybe the .DXF conversion directly produces surfaces for your program. So the main or only problem is to draw the thing in Autocad.

 

[dougantholz]

FKD,
The firm I work for actually developed a wind pressure software package that is very acurate, but I don't know how much it would cost. We have done this so far on NASA's Cape Canaveral site in Florida, a sports arena in Jacksonville Florida and some other smaller projects. If you would like some more information I think I could provide it to you.
My email is rdantholz@eqe.com

 

[hyper]

This might help:

I have generated an elliptic paraboloid using SAP90 ( introducing some points from the equation of the curves and then using the frontal generation "F" command ) ; then I exported it to SAP2000 or/and Autocad.

Regards.

 

[orbit]

Fkd:
it sound like a tensile structure project. there are two typs of sotfwars. surface and forten32. they are rather expensive specially the forten 32. it is a non-linear finite element programm. the site is

http://www.forten32.com

it does analysis and calculats loads and all. surface does only form genrations it does not do loads calculaions.it on

http://www.surfacesoftware.com

if u find other sources for thses types of software please refer them to me
thanks
robit