yade-users team mailing list archive
-
yade-users team
-
Mailing list archive
-
Message #01886
Re: How do I create a tunnel/slope?
Hi,
One important rule : you cannot remove particles in a simulation.
For creating a complex geometry, one workaround is this :
A- first generate a packing (using e.g. the triaxial routines) , then
save the simulation
B- reload the simulation, using a python script or a different
preprocessor, and filter bodies based on coordinates, so that only
bodies in/out of a circular arc will be actually loaded and kept into
the new problem.
We did that before for boreholes and slopes (perhaps Emanuele can give
some details and code concerning the creation of the slope?) and it
worked quite well. The only tricky part is you need to adjust the
confining stress in stage A so that you will not generate an explosion
when you suddendly create a free surface in a confined material.
Typically, you have to balance the confinment of stage A with the
gravitational effects of stage B.
You have an exemple of this from HydraulicTest below. Note that there
should be far more elegant ways to do that with python.
Bruno
HydraulicTest.cpp, l.156 :
for ( ; bi!=biEnd ; ++bi )
{
if ( ( *bi )->geometricalModel->getClassName() == "Sphere" )
{
if ( inside ( ( *bi )->physicalParameters->se3.position ) )
{
cerr << "insert sphere" << endl;
shared_ptr<Body> b = *bi;
//b->id = idSphere++;
rootBody->bodies->insert ( b, idSphere++ );
nbSpheres++;
}
}
if ( ( *bi )->geometricalModel->getClassName() == "Box" )
{
//if( inside((*bi)->physicalParameters->se3.position) )
{
cerr << "insert box" << endl;
shared_ptr<Body> b = *bi;
rootBody->bodies->insert ( b );
}
}
}
boon chiaweng a écrit :
Hi, I am a new user. I have sufficiently understood the
general purpose of Engines/Preprocessors and where to find the Contact
Laws. My intention is to explore the possibility of using YADE to
create a slope or a tunnel (separate problems). I understand that
'boxes' are used to surround the particles to contain them in a 3D
space, when isDynamic != 0. However, I would like the face of the
slope to be 'free', and would also want the tunnel perimeter/arc to be
'free'. How do I arrange the particles to make a slope? How do I
remove particles to make a tunnel? Of course, there could be other
techniques. Please help.
Yours faithfully,
Boon
------------------------------------------------------------------------
New Windows 7: Find the right PC for you. Learn more.
<http://windows.microsoft.com/shop>
------------------------------------------------------------------------
_______________________________________________
Mailing list: https://launchpad.net/~yade-users
Post to : yade-users@xxxxxxxxxxxxxxxxxxx
Unsubscribe : https://launchpad.net/~yade-users
More help : https://help.launchpad.net/ListHelp
--
_______________
Chareyre Bruno
Maître de Conférences
Grenoble INP
Laboratoire 3SR - bureau E145
BP 53 - 38041, Grenoble cedex 9 - France
Tél : 33 4 56 52 86 21
Fax : 33 4 76 82 70 43
________________
Follow ups
References
