Force Casas >> More as one possible
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Force Casas >> More as one possible
Hello All
I searched if there is a way to place more force cases at one static simulation like
1. 200n (simulation with the same fixed places and force places)
2. 400n (simulation with the same fixed places and force places)
3. 600n (simulation with the same fixed places and force places)
and then this tree will done after each othe, but I can't find a way.
If it's realy not possible at the moment then I suggest it for implementation
Greetings
Nanayaw
I searched if there is a way to place more force cases at one static simulation like
1. 200n (simulation with the same fixed places and force places)
2. 400n (simulation with the same fixed places and force places)
3. 600n (simulation with the same fixed places and force places)
and then this tree will done after each othe, but I can't find a way.
If it's realy not possible at the moment then I suggest it for implementation
Greetings
Nanayaw
-
- Veteran
- Posts: 3129
- Joined: Sat May 20, 2017 12:06 pm
- Location: Germany
Re: Force Casas >> More as one possible
You can define as much loads as you want.
But you can not define different loadcombinations.
For instance:
I have 4 loadcases, each safety-factor=1,0
G: selfweight structure
Eis: ice-loading
W60: 60% wind loading
W100: 100% wind loading
And 2 loadcombinations:
G+Eis+60% Wind (including safety-factors gamma-f)
G+100% Wind…
Each loadcombination is a separate FEM-run, this wont work with FC-FEM input.
But maybe there is a command to advice calculix after writing the inp.
Hope I understood you right.
But you can not define different loadcombinations.
For instance:
I have 4 loadcases, each safety-factor=1,0
G: selfweight structure
Eis: ice-loading
W60: 60% wind loading
W100: 100% wind loading
And 2 loadcombinations:
G+Eis+60% Wind (including safety-factors gamma-f)
G+100% Wind…
Each loadcombination is a separate FEM-run, this wont work with FC-FEM input.
But maybe there is a command to advice calculix after writing the inp.
Hope I understood you right.
Re: Force Casas >> More as one possible
Hello All
I found a solution and modified a bit it works so far, the only thing I didn't finished is the adding the used force to the reuslt name
if somebody know it from the mind then let me know or add it to the code.
Thanks and Greetings
Nanayaw
I found a solution and modified a bit it works so far, the only thing I didn't finished is the adding the used force to the reuslt name
if somebody know it from the mind then let me know or add it to the code.
Code: Select all
# The Analysis have to pre-prepared
# >> Material selected
# >> Fixed Constrain set
# >> Force Constrain set
# >> Mesh generated
from PySide import QtGui
import FemGui
from femtools import ccxtools
# Create the forces to make a multiple analysis with
force = QtGui.QInputDialog.getDouble(None, "Input", "Enter your start force:")[0] # Starting Force
fstep = QtGui.QInputDialog.getDouble(None, "Input", "Enter force step value:")[0] # Force Step
rng = QtGui.QInputDialog.getInt(None, "Input", "Enter amount of force steps:")[0]
forces = []
for f in range(rng):
forces.append(force)
force+=fstep
FemGui.setActiveAnalysis(FreeCAD.ActiveDocument.Analysis)
fea = ccxtools.FemToolsCcx()
fea.update_objects()
fea.check_prerequisites()
fea.reset_all()
fea.update_objects()
# Run analysis multiple times
for force in forces:
obj1 = App.ActiveDocument.getObjectsByLabel('ConstraintForce')[0]
obj1.Force = force
App.ActiveDocument.recompute()
print (obj1.Force)
fea.write_inp_file()
fea.ccx_run()
fea.load_results()
App.ActiveDocument.recompute()
Nanayaw
Static Analysis >> Multible Force Cases
Hello All
I modified the code now with renaming the results (label) with the used force and add some input dialogs
If somebody will modify again with additional features or optimizations then please share it with us.
The Analysis have to pre-prepared
>> Material selected
>> Fixed Constrain set
>> Force Constrain set
>> Mesh generated
NOTE:
1. There are only 10 force cases supported
2. There is only one time step supported
3. The analysis time will be much longer acc. additional simulations
This is an example of 10 load cases with step value of 10
The time step was set by the macro to 1
Greetings
Nanayaw
I modified the code now with renaming the results (label) with the used force and add some input dialogs
If somebody will modify again with additional features or optimizations then please share it with us.
The Analysis have to pre-prepared
>> Material selected
>> Fixed Constrain set
>> Force Constrain set
>> Mesh generated
NOTE:
1. There are only 10 force cases supported
2. There is only one time step supported
3. The analysis time will be much longer acc. additional simulations
This is an example of 10 load cases with step value of 10
The time step was set by the macro to 1
Code: Select all
#+-----------------------------------------------------------------------------------------------------+
#| Macro to run multible static FEM analysis with different forces |
#+-----------------------------------------------------------------------------------------------------+
#| The Analysis have to pre-prepared |
#| >> Material selected |
#| >> Fixed Constrain set |
#| >> Force Constrain set |
#| >> Mesh generated |
#+-----------------------------------------------------------------------------------------------------+
#| NOTE: |
#| 1. There are only 10 force cases supported |
#| 2. There are only one time step supported |
#+-----------------------------------------------------------------------------------------------------+
from PySide import QtCore, QtGui
import FemGui
from femtools import ccxtools
def mainFC():
cnt = 0
val1 = 0
val2 = 0
# Input boxes
rng = QtGui.QInputDialog.getInt(None, "Input", "Enter amount of force steps >> only 10 are possible:")[0]
if (rng > 10):
Msgb = QtGui.QMessageBox(QtGui.QMessageBox.Information, 'Information Message:', 'Only 10 force cases are allowed, action abort')
Msgb.setWindowModality(QtCore.Qt.ApplicationModal)
Msgb.exec_()
return
else:
force = QtGui.QInputDialog.getInt(None, "Input", "Enter your start force:")[0]
fstep = QtGui.QInputDialog.getInt(None, "Input", "Enter force step value:")[0]
tmstp = QtGui.QInputDialog.getDouble(None, "Input", "Enter time step >> only one could set:")[0]
# Create the forces to make a multiple analysis with
forces = []
for f in range(rng):
forces.append(force)
force+=fstep
FemGui.setActiveAnalysis(FreeCAD.ActiveDocument.Analysis)
fea = ccxtools.FemToolsCcx()
fea.update_objects()
fea.check_prerequisites()
fea.reset_all()
fea.update_objects()
# Run analysis multiple times
for force in forces:
obj1 = App.ActiveDocument.getObjectsByLabel('ConstraintForce')[0]
obj1.Force = force
App.ActiveDocument.recompute()
fea.write_inp_file()
fea.ccx_run()
fea.load_results()
App.ActiveDocument.getObject('SolverCcxTools').TimeEnd = tmstp
App.ActiveDocument.getObject('SolverCcxTools').TimeInitialStep = tmstp
App.ActiveDocument.recompute()
if (cnt ==0 and val1 ==0):
obj2 = App.ActiveDocument.getObjectsByLabel('CCX_Results')[0]
obj2.Label = 'CCX_Results_' + str(force)
val1 =1
cnt =cnt+1
App.ActiveDocument.recompute()
elif (cnt ==1 and val1==1):
obj3 = App.ActiveDocument.getObjectsByLabel('CCX_Results00' + str(cnt))[0]
obj3.Label = 'CCX_Results_' + str(force)
cnt =cnt+1
App.ActiveDocument.recompute()
elif (cnt > 1 and val1==1 and cnt < 10):
obj4 = App.ActiveDocument.getObjectsByLabel('CCX_Results00' + str(cnt))[0]
obj4.Label = 'CCX_Results_' + str(force)
cnt =cnt+1
val2 = 1
App.ActiveDocument.recompute()
elif (cnt == 10 and val2==1 and rng ==10):
obj5 = App.ActiveDocument.getObjectsByLabel('CCX_Results00' + str(cnt))[0]
obj5.Label = 'CCX_Results_' + str(force)
cnt =cnt+1
App.ActiveDocument.recompute()
diag = QtGui.QMessageBox(QtGui.QMessageBox.Information, 'Information Message:', 'Analysis finished')
diag.setWindowModality(QtCore.Qt.ApplicationModal)
diag.exec_()
mainFC()
Nanayaw
- Attachments
-
- FEM_Static_Multible_Force_Cases.FCMacro
- (4.06 KiB) Downloaded 47 times
Re: Force Casas >> More as one possible
Hello All
here I made an Icon for that macro it is the same as constraint force but with the word Multi
It could add as follow
Create a folder where you like to place the icon then do following
Here the result in a custom menubar at FEM WB
after restart FreeCAD
Greetings
Nanayaw
here I made an Icon for that macro it is the same as constraint force but with the word Multi
It could add as follow
Create a folder where you like to place the icon then do following
Here the result in a custom menubar at FEM WB
after restart FreeCAD
Greetings
Nanayaw
- Attachments
-
- FEM_MultiConstraintForce.svg
- (18.83 KiB) Downloaded 50 times
Re: Force Casas >> More as one possible
Hello All
here an update of the multi force case
>> Add an message box after start macro
Greetings
Nanayaw
here an update of the multi force case
>> Add an message box after start macro
Greetings
Nanayaw
- Attachments
-
- FEM_Static_Multible_Force_Cases.FCMacro
- (4.57 KiB) Downloaded 44 times
-
- Posts: 991
- Joined: Wed Mar 27, 2019 10:45 am
Re: Force Casas >> More as one possible
One of the Elmer tutorials nonGui deals with modifying the case during a simulation, I've never tried so i cannot support, but it would necessitate a transient sim and enough timesteps between changes to allow steady state.
Essentially in the same sim you'd see self weight, increasing wind...then ice buildup
Essentially in the same sim you'd see self weight, increasing wind...then ice buildup
Re: Force Casas >> More as one possible
Hello Raton Leveur
at the moment I did not have experiance with elmer.
This macro is specially made to get different force cases done with one
static analysis.
If you need another values for multible cases use, then we could
try to modify the macro for your needs.
Greetings
Nanayaw
at the moment I did not have experiance with elmer.
This macro is specially made to get different force cases done with one
static analysis.
If you need another values for multible cases use, then we could
try to modify the macro for your needs.
Greetings
Nanayaw
Re: Force Casas >> More as one possible
Hello All
I made a update at the macro not in function only at msg box text and add msg box
so that it will be more self explaining.
Greetings
Nanayaw
I made a update at the macro not in function only at msg box text and add msg box
so that it will be more self explaining.
Greetings
Nanayaw
- Attachments
-
- FEM_Static_Multible_Force_Cases_Update_1_.FCMacro
- (5.75 KiB) Downloaded 39 times
Re: Force Casas >> More as one possible
Hello All
is it possible to get the von mieses max stress by phyton after simulation finished???
The reason is if it will be possible then the macro could modified that if the stress is
at the level of break then the futher analsis will not be done.
Thanks and Greetings
Nanayaw
is it possible to get the von mieses max stress by phyton after simulation finished???
The reason is if it will be possible then the macro could modified that if the stress is
at the level of break then the futher analsis will not be done.
Thanks and Greetings
Nanayaw