[CIG-SHORT] Descriptive label for spatial database not specified

[Farrokh Sheibani]

Dear Brad,

Thank you for the quick reply. Regarding Point Force, below is the script mentioned in Pylith manual (page 79) for Point Force parameters. I was wondering why should we fix displacement for applying point force in z direction? Are we going to exclude the displacement for the specific degree of freedom which we apply Point Force?


******************* FROM PYLITH MANUAL **********
 [pylithapp.problem]
bc = [mybc]
bc.mybc = pylith.bc.PointForce
[pylithapp.problem.bc.mybc]
label = group A
bc_dof = [2] ; fixed displacement in z direction
db_initial = spatialdata.spatialdb.SimpleDB
db_initial.iohandler.filename = force_A.spatialdb
db_initial.query_type = nearest ; change query type to nearest point algorithm
db_rate = spatialdata.spatialdb.UniformDB
db_rate.values = [force-rate-z]
db_rate.data = [1.0e+5*newton/s]
************************************************************************


Btw, I added labels to Point Force section, but still I got the error message. Below is my scrip about Point Force and I also attached the a screenshot showing the error message. I appreciate if you let me know where is my fault.


******************************** My Point Force Script **************
[pylithapp.timedependent.bc]
bc.LoadP = pylith.bc.PointForce
[pylithapp.timedependent.bc.LoadP]

label = LoadP
bc_dof = [2]

db_initial = spatialdata.spatialdb.UniformDB
db_initial.lable = Point force
db_initial.values = [force-x,force-y,force-z]
db_initial.data = [0.0*newton, 0.0*newton, 1.0e+2*newton]

db_rate = spatialdata.spatialdb.UniformDB
db_rate.lable = Rate force
db_rate.values = [force-rate-x,force-rate-y,force-rate-z, rate-start-time]
db_rate.data = [0.0*newton/s,0.0*newton/s,-1.0e+2*newton/s,0.0*s]
*******************************************************************************************


Thank you so much in advance!

Best,

Farrokh




[cid:9F07746F-DA35-4157-87A0-3D713B454760 at mit.edu]
Farrokh Sheibani, PhD
Postdoctoral Research Associate
Department of Earth Atmospheric and Planetary Sciences; Earth Resources Laboratory
Massachusetts Institute of Technology






On Jul 14, 2016, at 11:05 AM, Brad Aagaard <baagaard at usgs.gov<mailto:baagaard at usgs.gov>> wrote:

Farrokh,

Every spatial database has a descriptive "label" property. The value of the label is used in error messages. We don't have a meaningful default, so including a label is required.

For example:

db_properties = spatialdata.spatialdb.SimpleDB
db_properties.label = Elastic properties

Regards,
Brad


On 07/13/2016 06:24 PM, Farrokh Sheibani wrote:
Dear Brad,

I hope you are doing well. I am working with Dr. Brad Hager. I try to
model Ball Drop or “Lamb Problem” as a verification for our dynamic-wave
propagation modeling using Pylith. The problem include a 3” by 1.5” rock
sample and at time zero an instantaneous (Heaviside Step Function) load
is applied on the center of the sample which generate spherical waves.
Since the analytical solution of Lamb Problem is available we would like
to use it as verification.

My problem is using Point Force in Pylith. I tried to use the example in
the manual, but I keep getting the message: “Descriptive label for
spatial database not specified”. I tried to use both SimpleDB and
UniformDB for Initial condition, but unsuccessful to get the result.

I was wondering you may give me an advise. I attached my cfg and jou
files as well.


Thank you so much in advance!

With best regards,

Farrokh

Farrokh Sheibani, PhD
Postdoctoral Research Associate
Department of Earth Atmospheric and Planetary Sciences; Earth Resources
Laboratory
Massachusetts Institute of Technology








-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.geodynamics.org/pipermail/cig-short/attachments/20160714/2d564dcb/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Screenshot - 07142016 - 01_36_06 PM.png
Type: image/png
Size: 88353 bytes
Desc: Screenshot - 07142016 - 01_36_06 PM.png
URL: <http://lists.geodynamics.org/pipermail/cig-short/attachments/20160714/2d564dcb/attachment-0001.png>