3DSOLID2FDS free conversion tool

[johannes]

I've written a utility to convert 3DSOLID objects in AutoCAD to &OBST
for FDS 5. People using AutoCAD 3DSOLID modelling can now use this
free utility to easily and very quickly convert the model geometry to
&OBST lines.

I've uploaded 2 files to the Files section, i.e. 3dsolid2fds.fas and
simple3dmodel.dwg.

In AutoCAD, goto Tools, Load Application and select 3dsolid2fds.fas
and hit Load. Once loaded, in the Command Line type 3dsolid2fds, then
type ALL or select the objects you wish to convert. You will be
prompted for a location to save the output file.

The utility would identify the layer of your 3dsolid objects by name,
e.g wall, door, furniture, etc. and would use the layer name as
SURF_ID on each &OBST line.

Johannes Dimyadi

[Kevin]

Thanks -- but the Files section is not permanent. It is only a
temporary repository.

Bryan -- could you add this listing to the "3rd Party" page.

[Bryan Klein]

Johannes, thank you for your generous contribution.
To make your work more accessible, I would like to add a link to the
'Third Party Tools' page of the FDS-SMV website.

The best way for you to contribute this to the community, would be to
create a single web page for it. The page should contain information
about the tool, a link to a .zip file and your contact information.
The zip file should contain the components of the plug-in and a
README.txt file on how to use it.

I will then make a link to your page, from the third party tools page.
This way you can update the information on the page and the zip file
contents whenever you feel it is necessary and you will not need to
rely on us to host and maintain this for you.

Since you have a Google Account, you have access to 'Google Page
Creator', this is a free website hosting service that you can use to
create the page. It is very easy to use and should make this process
fairly painless.
See:
http://pages.google.com
and
http://pages.google.com/-/about.html

If you need any help using the Page Creator, please let me know.

Again, thank you for this contribution, and please send me the URL for
your page when you have it ready.

Best Regards,
Bryan

--
Bryan Klein
bryan...@nist.gov

National Institute of Standards and Technology
100 Bureau Drive, Mail Stop 8663
Gaithersburg MD 20899
Phone: 301 975 5171
Fax: 301 975 4052

[charlie.thornton]

Johannes,

I think this will help a lot of people. We've been trying (with
limited success) to come up with crazy ways to decompose 3DSOLID
entities into other entities that are easier to deal with but not
quite as descriptive (e.g. 3DFACE) for a long time. I think this
solution is far better. Thanks!

- Charlie

[johannes]

I find 3dsolid models are relatively easy and quick to construct and
well suited for FDS application. For those who don't own tools such as
Pyrosim, I wonder how they construct their FDS models these days.

Johannes


On Feb 21, 6:23 am, "charlie.thornton" <charlie.thorn...@gmail.com>
wrote:

> > Johannes Dimyadi- Hide quoted text -
>
> - Show quoted text -

[Bartek]

by typing &obst many, many times :)

Bartek

[Bartek]

Lads

I have a little confusion about using REAC, HRRPUA and visibility...

In my scenario i have already defined energy of the fire:

&SURF ID='fireplace' HRRPUA=1750.0 COLOR='RED', RAMP_Q='fire_ramp'/
&RAMP ID='fire_ramp' T=0.0 F=0.001 /
&RAMP ID='fire_ramp' T=40.0 F=0.01 /
&RAMP ID='fire_ramp' T=60.0 F=0.02 /
&RAMP ID='fire_ramp' T=120.0 F=0.5 /
&RAMP ID='fire_ramp' T=130.0 F=0.52 /
&RAMP ID='fire_ramp' T=220.0 F=1 /
&RAMP ID='fire_ramp' T=660.0 F=1 /
&RAMP ID='fire_ramp' T=725.0 F=0 /

&OBST XB=21,23,6,8,0,1 SURF_IDS='fireplace','INERT','INERT' /

so fire grows up to 7MW between 220 and 660 seconds of the scenario

i have to obtain visibility quontity so fds ask me to provide REAC line...

&SLCF PBX=22,QUANTITY='visibility'/

In this scenario will be burned some clothes in the closed (cotton and
wood). What i have to type into fds? only the reaction?

ie &REAC ID = 'PROPANE' SOOT_YIELD = 0.01 C = 3. H = 8.
HEAT_OF_COMBUSTION = 46460. IDEAL = .TRUE. /

or also material properties?

Bartek

[Kevin]

You have posted a message to an existing discussion.

In any case, it seems you do not understand the difference between gas
phase combustion (REAC) and solid phase pyrolysis (MATL). You need to
read the User's Guide more carefully. This is of fundamental
importance if you want to use FDS.

[johannes]

As suggested, I've created a web page for this with a download link
and some notes on the use of the utility. I'm sure it will appear on
the "Third Party Tools" page on this site next time the page gets
updated, along with the updated version of DXF2FDS hopefully.

Johannes

On Feb 21, 3:47 am, "Bryan Klein" <bryanwkl...@gmail.com> wrote:
> Johannes, thank you for your generous contribution.
> To make your work more accessible, I would like to add a link to the
> 'Third Party Tools' page of the FDS-SMV website.
>
> The best way for you to contribute this to the community, would be to
> create a single web page for it. The page should contain information
> about the tool, a link to a .zip file and your contact information.
> The zip file should contain the components of the plug-in and a
> README.txt file on how to use it.
>
> I will then make a link to your page, from the third party tools page.
>  This way you can update the information on the page and the zip file
> contents whenever you feel it is necessary and you will not need to
> rely on us to host and maintain this for you.
>
> Since you have a Google Account, you have access to 'Google Page
> Creator', this is a free website hosting service that you can use to
> create the page.  It is very easy to use and should make this process
> fairly painless.
> See:http://pages.google.com

> andhttp://pages.google.com/-/about.html

>
> If you need any help using the Page Creator, please let me know.
>
> Again, thank you for this contribution, and please send me the URL for
> your page when you have it ready.
>
> Best Regards,
> Bryan
>

> On 2/20/08, johannes <jdimy...@gmail.com> wrote:
>
>
>
>
>
>
>
> > I've written a utility to convert 3DSOLID objects in AutoCAD to &OBST
> > for FDS 5. People using AutoCAD 3DSOLID modelling can now use this
> > free utility to easily and very quickly convert the model geometry to
> > &OBST lines.
>
> > I've uploaded 2 files to the Files section, i.e. 3dsolid2fds.fas and
> > simple3dmodel.dwg.
>
> > In AutoCAD, goto Tools, Load Application and select 3dsolid2fds.fas
> > and hit Load. Once loaded, in the Command Line type 3dsolid2fds, then
> > type ALL or select the objects you wish to convert. You will be
> > prompted for a location to save the output file.
>
> > The utility would identify the layer of your 3dsolid objects by name,
> > e.g wall, door, furniture, etc. and would use the layer name as
> > SURF_ID on each &OBST line.
>
> > Johannes Dimyadi
>
> --
> Bryan Klein

> bryan.kl...@nist.gov

>
> National Institute of Standards and Technology
> 100 Bureau Drive, Mail Stop 8663
> Gaithersburg MD 20899
> Phone: 301 975 5171

> Fax: 301 975 4052- Hide quoted text -

[Bryan Klein]

What is the URL to your page?
-Bryan

On 2/20/08, johannes <jdim...@gmail.com> wrote:
>

--
Bryan Klein
bryan...@nist.gov

[johannes]

I actually sent it to your email address. Not sure why you didn't
receive it. Anyway, it's

http://jdimyadi.googlepages.com/3dsolid2fds

Johannes

On Feb 22, 11:46 am, "Bryan Klein" <bryanwkl...@gmail.com> wrote:
> What is the URL to your page?
> -Bryan
>

[Glenn Forney]

our firewall filters (at NIST) strip applications (files with .exe
extensions) from email attachments. I sometimes use www.yousendit.com
to send .exe's .

--
Glenn Forney

National Institute of Standards and Technology

100 Bureau Drive, Stop 8663
Gaithersburg MD 20899-8663

Telephone: (301) 975 2313
FAX: (301) 975 4052

Pre-decisional and sensitive information. Not for attribution, distribution, or reproduction.

[johannes]

I can understand if it was .exe, but I didn't send any files - I wrote
a quick note to Bryan's email address with the URL of my page. It must
have gone to the twilight zone :)

Johannes

> Pre-decisional and sensitive information.   Not for attribution, distribution, or reproduction.- Hide quoted text -

[johannes]

And, thanks for the link to www.yousendit.com. I'm sure it might come
handy one day.

Johannes


On Feb 23, 12:00 am, Glenn Forney <glenn.for...@nist.gov> wrote:

> Pre-decisional and sensitive information.   Not for attribution, distribution, or reproduction.- Hide quoted text -

[Glenn Forney]

ok, I misunderstood.
glenn

[colesy]

This is an excellent addon and Im sure that it will get widely used. I
have a couple of suggestions based on previous experience with these
type of applications. Alot of models use some soft of uniform grid.
Now with the latest release of version 5, and multiple meshes, grids
now have to effectively line up at the domain interface.

Most of the output that I see from these type of applications have
coordinates that are 4 or 5 dp long, which is unnecessary. Also, a lot
of the obstructions do not snap to the grid when imported into the fds
model. The result when you do your setup run in smokeview, or you
import into a pre-processor like pyrosim, is a multitude of gaps in
solid obstructions if your trying to create a closed environment for a
roof or a room. For simplistic models this is easy to debug and find
the errors, but when you start creating large models with domed roofs,
or curved walls, or other compelx geometry, it becomes very complex
and time consuming.

If there was a function that allowed you to input some global grid
dimensions (dx,dy,dz) so at least the obstructions would attempt to
snap to the grids once you import into the model it would be
beneficial.

Great work!
Andrew

[jvenart]

It would be nice if it were possible to use Google SketchUp for this purpose? I think as some earlier message this had been suggested.

 J Venart

[colesy]

In additon to sketchup can it be incorporate for other 3D drafting
software like Rhino and Revit?
Andrew

[sean michaletz]

Hi,

What is the URL for the "Third Party Tools" page? can't seem to find
it!

Sean

On Feb 20, 7:47 am, "Bryan Klein" <bryanwkl...@gmail.com> wrote:
> Johannes, thank you for your generous contribution.
> To make your work more accessible, I would like to add a link to the

> 'ThirdPartyTools' page of the FDS-SMV website.

>
> The best way for you to contribute this to the community, would be to
> create a single web page for it. The page should contain information
> about the tool, a link to a .zip file and your contact information.
> The zip file should contain the components of the plug-in and a
> README.txt file on how to use it.
>

> I will then make a link to your page, from the thirdpartytools page.

> This way you can update the information on the page and the zip file
> contents whenever you feel it is necessary and you will not need to
> rely on us to host and maintain this for you.
>
> Since you have a Google Account, you have access to 'Google Page
> Creator', this is a free website hosting service that you can use to
> create the page. It is very easy to use and should make this process
> fairly painless.
> See:http://pages.google.com

> andhttp://pages.google.com/-/about.html

>
> If you need any help using the Page Creator, please let me know.
>
> Again, thank you for this contribution, and please send me the URL for
> your page when you have it ready.
>
> Best Regards,
> Bryan
>

> On 2/20/08, johannes <jdimy...@gmail.com> wrote:
>
>
>
>
>
> > I've written a utility to convert 3DSOLID objects in AutoCAD to &OBST
> > for FDS 5. People using AutoCAD 3DSOLID modelling can now use this
> > free utility to easily and very quickly convert the model geometry to
> > &OBST lines.
>
> > I've uploaded 2 files to the Files section, i.e. 3dsolid2fds.fas and
> > simple3dmodel.dwg.
>
> > In AutoCAD, goto Tools, Load Application and select 3dsolid2fds.fas
> > and hit Load. Once loaded, in the Command Line type 3dsolid2fds, then
> > type ALL or select the objects you wish to convert. You will be
> > prompted for a location to save the output file.
>
> > The utility would identify the layer of your 3dsolid objects by name,
> > e.g wall, door, furniture, etc. and would use the layer name as
> > SURF_ID on each &OBST line.
>
> > Johannes Dimyadi
>
> --
> Bryan Klein

> bryan.kl...@nist.gov

[Glenn Forney]

http://fire.nist.gov/fds/thirdparty.html

--
Glenn Forney

National Institute of Standards and Technology

[tyler]

Sweet. I no longer need to extrude 3dface objects in other software,
nor do I have to make six objects where one will do.

Thank you from Maryland, USA.

[louiea]

as a side note,

your webpage is inconsistent, on the left there is a note which
explains that a little icon appears next to links that lead off of the
fire.nist.gov website, but none of the links on the 3rd party apps
page has that icon.

[johannes]

I'm glad you find it useful! It has certainly save me a lot of time.

Johannes

[johannes]

I believe the "third party tools" page is dedicated to provide easy
access to tools NOT hosted on NIST site. I guess it's quite obvious
that they're all hosted externally and don't really need to have the
"external link" icon you mentioned.

Johannes

[johannes]

Thanks.

You can first construct a 3D mesh in the CAD environment by drawing
gridlines in space with the desired dimensions and group these lines
into an object. You can then construct your solid models to snap to
the gridlines.

Alternatively, you can setup "grid" and "object snap" (both uniform as
well as non-uniform x, y aspect ratios) features in AutoCAD
environment and construct your solid models to conform to this grid
system, provided you're using World user coordinates system.

3dsolid2fds tool only picks up 3dsolid object and would ignore all
other entities.

Johannes

[johannes]

Google Sketchup Pro can export to DXF, which is brilliant. The DXF
output contains POLYFACE objects, which can be exploded into 3DFACE
entities. I wonder if this would work with Dave Sheppard's DXF2FDS
conversion tool.

Alternatively, I'm sure we can convert polyface to 3dsolid by
programming and then use 3dsolid2fds to convert the geometry to FDS.

Johannes

> >>>- Show quoted text -- Hide quoted text -

[johannes]

Andrew

I was involved in a research that looks into converting BIM models
such as that produced by Revit or ArchiCAD using IFC data model. We
were quite pleased with the result, although further work is still
required. At this stage we can only convert single storey buildings
with rectilinear walls.

Johannes

> > >>>- Show quoted text -- Hide quoted text -

[johannes]

jvenart

Thanks for your email. 3dsolid2fds will be available via a link on the
Third Party Tools page soon.

In the mean time, you can get it directly from
http://jdimyadi.googlepages.com/3dsolid2fds

Johannes

> >>>- Show quoted text -- Hide quoted text -

[Bryan Klein]

Johannes, thank you for the link, I will add it ASAP, also, I will be
adding the External Link icons to all the links, I agree that it is
implied by definition, but I do need to add them to comply with NIST
web page policies. So thank you louiea for the suggestion and
catching my oversight.

I am out of the office until next Monday, so the Third Party page will
not be updated until then.

-Bryan

--
Bryan Klein
bryan...@nist.gov

[BKlein]

After 3:45PM EST today, the FDS-SMV Third Party Page will be updated
with a link to your site, and a short description taken from the
site. See, http://fire.nist.gov/fds/thirdparty.html

Again, thank you for the contribution.
-Bryan

On Feb 22, 8:06 pm, johannes <jdimy...@gmail.com> wrote:
> jvenart
>
> Thanks for your email. 3dsolid2fds will be available via a link on the
> Third Party Tools page soon.
>

> In the mean time, you can get it directly fromhttp://jdimyadi.googlepages.com/3dsolid2fds

[johannes]

Thanks, Bryan.

On Feb 28, 9:32 am, BKlein <bryanwkl...@gmail.com> wrote:
> After 3:45PM EST today, the FDS-SMV Third Party Page will be updated
> with a link to your site, and a short description taken from the

> site.   See,http://fire.nist.gov/fds/thirdparty.html