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importSU2Mesh.py
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#
__title__ = "FreeCAD SU2 library"
__author__ = "John Wang based on importCcxFrdResults.py"
## @package importSU2Mesh
# \ingroup FEM
# \brief FreeCAD SU2 Reader for FEM workbench
import FreeCAD
from FreeCAD import Console
import os
def moveon(fp):
while 1:
line = fp.readline().strip()
if len(line)==0 or line[0]=='#':
continue
else:
return line
# ********* generic FreeCAD import and export methods *********
if open.__module__ == "__builtin__":
# because we'll redefine open below (Python2)
pyopen = open
elif open.__module__ == "io":
# because we'll redefine open below (Python3)
pyopen = open
def open(filename):
"called when freecad opens a file"
docname = os.path.splitext(os.path.basename(filename))[0]
insert(filename, docname)
def insert(
filename,
docname
):
"called when freecad wants to import a file"
try:
doc = FreeCAD.getDocument(docname)
except NameError:
doc = FreeCAD.newDocument(docname)
FreeCAD.ActiveDocument = doc
importSU2Mesh(filename)
# ********* module specific methods *********
def importSU2Mesh(
filename,
analysis=None,
result_name_prefix=""
):
from . import importToolsFem
import ObjectsFem
m = read_SU2_mesh(filename)
result_mesh_object = None
if len(m["Nodes"]) > 0:
mesh = importToolsFem.make_femmesh(m)
result_mesh_object = ObjectsFem.makeMeshResult(
FreeCAD.ActiveDocument,
"ResultMesh"
)
result_mesh_object.FemMesh = mesh
res_mesh_is_compacted = False
nodenumbers_for_compacted_mesh = []
number_of_increments = len(m["Results"])
Console.PrintLog(
"Increments: " + str(number_of_increments) + "\n"
)
if len(m["Results"]) > 0:
for result_set in m["Results"]:
if "number" in result_set:
eigenmode_number = result_set["number"]
else:
eigenmode_number = 0
step_time = result_set["time"]
step_time = round(step_time, 2)
if eigenmode_number > 0:
results_name = (
"{}Mode{}_Results"
.format(result_name_prefix, eigenmode_number)
)
elif number_of_increments > 1:
results_name = (
"{}Time{}_Results"
.format(result_name_prefix, step_time)
)
else:
results_name = (
"{}Results"
.format(result_name_prefix)
)
res_obj = ObjectsFem.makeResultMechanical(FreeCAD.ActiveDocument, results_name)
res_obj.Mesh = result_mesh_object
res_obj = importToolsFem.fill_femresult_mechanical(res_obj, result_set)
if analysis:
analysis.addObject(res_obj)
# complementary result object calculations
import femresult.resulttools as restools
import femtools.femutils as femutils
if not res_obj.MassFlowRate:
if res_mesh_is_compacted is False:
# first result set, compact FemMesh and NodeNumbers
res_obj = restools.compact_result(res_obj)
res_mesh_is_compacted = True
nodenumbers_for_compacted_mesh = res_obj.NodeNumbers
else:
# all other result sets, do not compact FemMesh, only set NodeNumbers
res_obj.NodeNumbers = nodenumbers_for_compacted_mesh
# fill DisplacementLengths
res_obj = restools.add_disp_apps(res_obj)
# fill StressValues
res_obj = restools.add_von_mises(res_obj)
if res_obj.getParentGroup():
has_reinforced_mat = False
for obj in res_obj.getParentGroup().Group:
if obj.isDerivedFrom("App::MaterialObjectPython") \
and femutils.is_of_type(obj, "Fem::MaterialReinforced"):
has_reinforced_mat = True
restools.add_principal_stress_reinforced(res_obj)
break
if has_reinforced_mat is False:
# fill PrincipalMax, PrincipalMed, PrincipalMin, MaxShear
res_obj = restools.add_principal_stress_std(res_obj)
else:
# if a pure SU2 file was opened no analysis and thus no parent group
# fill PrincipalMax, PrincipalMed, PrincipalMin, MaxShear
res_obj = restools.add_principal_stress_std(res_obj)
# fill Stats
res_obj = restools.fill_femresult_stats(res_obj)
return res_obj
else:
error_message = (
"We have nodes only.\n"
)
Console.PrintMessage(error_message)
if analysis:
analysis.addObject(result_mesh_object)
if FreeCAD.GuiUp:
if analysis:
import FemGui
FemGui.setActiveAnalysis(analysis)
FreeCAD.ActiveDocument.recompute()
else:
Console.PrintError(
"Problem on SU2 file import. No nodes found in SU2 file.\n"
)
# read a SU2 result file and extract the nodes
# displacement vectors and stress values.
def read_SU2_mesh(
SU2_input
):
Console.PrintMessage(
"Read SU2 mesh from SU2 file: {}\n"
.format(SU2_input)
)
nodes = {}
elements_hexa8 = {}
elements_penta6 = {}
elements_tetra4 = {}
elements_tetra10 = {}
elements_penta15 = {}
elements_hexa20 = {}
elements_tria3 = {}
elements_tria6 = {}
elements_quad4 = {}
elements_quad8 = {}
elements_seg2 = {}
elements_seg3 = {}
results = []
mode_results = {}
mode_results["number"] = float("NaN")
mode_results["time"] = float("NaN")
mode_disp = {}
mode_stress = {}
mode_strain = {}
mode_peeq = {}
mode_temp = {}
mode_massflow = {}
mode_networkpressure = {}
nodes_found = False
elements_found = False
mode_time_found = False
mode_disp_found = False
mode_stress_found = False
mode_strain_found = False
mode_peeq_found = False
mode_temp_found = False
mode_massflow_found = False
mode_networkpressure_found = False
end_of_section_found = False
end_of_SU2_data_found = False
input_continues = False
mode_eigen_changed = False
mode_time_changed = False
eigenmode = 0
eigentemp = 0
elem = -1
elemType = 0
timestep = 0
timetemp = 0
SU2_file = pyopen(SU2_input, "r")
#isOneZone=0
tline=[]
for line in SU2_file:
aline=line.strip()
if len(aline)==0 or aline[0]=='%':
continue
else:
tline.append(line.strip())
print ("")
i=0
data = tline[i].split()
dName=data[0]
if dName=='NZONE=':
NZONE= int(data[1])
elif dName=='NDIME=':
i=i+1
data = tline[i].split()
dName=data[0]
if dName=='NZONE=':
NZONE= int(data[1])
else:
NZONE=1
i=i-2
print ("NZONE: "+str(NZONE))
memStart=0
nodeStart=0
for idZ in range(NZONE): # Member
if NZONE>1:
i+=1
print ("")
data = tline[i].split()
dName=data[0]
IZONE= int(data[1])
print ("IZONE: "+str(IZONE))
i+=1
print ("")
data = tline[i].split()
dName=data[0]
NDIME= int(data[1])
print ("NDIME: "+str(NDIME))
i+=1
print ("")
data = tline[i].split()
NELEM = int(data[1])
numMember=NELEM
print ("NELEM: "+str(numMember))
for idM in range(numMember): # Member
#5 5122 5109 5075 10215
i+=1
#print (tline[i])
dataNode = tline[i].split()
elem = int(dataNode[0])
if (elem==3): #line
# 3 109 110
nd1 = int(dataNode[1])
nd2 = int(dataNode[2])
elements_seg2[memStart+idM+1] = (nodeStart+nd1+1, nodeStart+nd2+1)
continue
elif (elem==5): #triangle
nd1 = int(dataNode[1])
nd2 = int(dataNode[2])
nd3 = int(dataNode[3])
#elements_seg3[memStart+idM+1] = (nodeStart+nd1+1, nodeStart+nd2+1, nodeStart+nd3+1)
elements_tria3[memStart+idM+1] = (nodeStart+nd1+1, nodeStart+nd2+1, nodeStart+nd3+1)
elif (elem==9): #Quadrilateral
nd1 = int(dataNode[1])
nd2 = int(dataNode[2])
nd3 = int(dataNode[3])
nd4 = int(dataNode[4])
elements_quad4[memStart+idM+1] = (nodeStart+nd1+1, nodeStart+nd2+1, nodeStart+nd3+1, nodeStart+nd4+1)
elif (elem==10): #Tetrahedral
#10 17331 102263 102225 102187 36
nd1 = int(dataNode[1])
nd2 = int(dataNode[2])
nd3 = int(dataNode[3])
nd4 = int(dataNode[4])
elements_tetra4[memStart+idM+1] = (nodeStart+nd1+1, nodeStart+nd2+1, nodeStart+nd3+1, nodeStart+nd4+1)
elif (elem==12): #Hexahedral
#12 0 1 21 20 800 801 821 820 0
nd1 = int(dataNode[1])
nd2 = int(dataNode[2])
nd3 = int(dataNode[3])
nd4 = int(dataNode[4])
nd5 = int(dataNode[5])
nd6 = int(dataNode[6])
nd7 = int(dataNode[7])
nd8 = int(dataNode[8])
elements_hexa8[memStart+idM+1] = (nodeStart+nd1+1, nodeStart+nd2+1, nodeStart+nd3+1, nodeStart+nd4+1, nodeStart+nd5+1, nodeStart+nd6+1, nodeStart+nd7+1, nodeStart+nd8+1)
continue
elif (elem==13): #Prism
nd1 = int(dataNode[1])
nd2 = int(dataNode[2])
nd3 = int(dataNode[3])
nd4 = int(dataNode[4])
nd5 = int(dataNode[5])
nd6 = int(dataNode[6])
elements_penta6[memStart+idM+1] = (nodeStart+nd1+1, nodeStart+nd2+1, nodeStart+nd3+1, nodeStart+nd4+1, nodeStart+nd5+1, nodeStart+nd6+1)
continue
elif (elem==14): #Pyramid
#10 17331 102263 102225 102187 36
nd1 = int(dataNode[1])
nd2 = int(dataNode[2])
nd3 = int(dataNode[3])
nd4 = int(dataNode[4])
nd5 = int(dataNode[5])
elements_tetra4[memStart+idM+1] = (nodeStart+nd1+1, nodeStart+nd2+1, nodeStart+nd3+1, nodeStart+nd4+1, nodeStart+nd5+1)
else:
print ("elem=")+str(elem)+" not supprot yet."
memStart=memStart+numMember
#node 22222222222222222222222222222222222222222222222222222222222222222222
#NPOIN= 5233
i+=1
data = tline[i].split()
NPOIN = int(data[1])
numNode = NPOIN
print ("NPOIN: "+str(numNode))
for idN in range(numNode): # node
i+=1
#9.997500181200000e-01 -3.632896519016437e-05 0
#print (tline[i])
dataNode = tline[i].split()
nodes_x = float(dataNode[0])
nodes_y = float(dataNode[1])
if NDIME==2:
nodes_z = 0.
else:
nodes_z = float(dataNode[2])
nodes[nodeStart+idN+1] = FreeCAD.Vector(nodes_x, nodes_y, nodes_z)
#print (str(nodes_x))
nodeStart=nodeStart+numNode
#NMARK= 5
#MARKER_TAG= IN
#MARKER_ELEMS= 35
i+=1
if i<len(tline):
print (tline[i])
data = tline[i].split()
dName = data[0]
if dName=='NMARK=':
NMark = int(data[1])
print ("NMark: "+str(NMark))
for idMark in range(NMark): # node
print (str(idMark))
i+=1
data = tline[i].split()
print (tline[i])
i+=1
data = tline[i].split()
MARKER_ELEMS=int(data[1])
print ("MARKER_ELEMS: "+str(MARKER_ELEMS))
for jd in range(MARKER_ELEMS): # node
i+=1
#dataNode = tline[i].split()
else:
i=i-1
#NPERIODIC= 1
#break
# close SU2 file if loop over all lines is finished
SU2_file.close()
if not inout_nodes:
if results:
if "mflow" in results[0] or "npressure" in results[0]:
Console.PrintError(
"We have mflow or npressure, but no inout_nodes file.\n"
)
if not nodes:
Console.PrintError("FEM: No nodes found in SU2 file.\n")
return {
"Nodes": nodes,
"Seg2Elem": elements_seg2,
"Seg3Elem": elements_seg3,
"Tria3Elem": elements_tria3,
"Tria6Elem": elements_tria6,
"Quad4Elem": elements_quad4,
"Quad8Elem": elements_quad8,
"Tetra4Elem": elements_tetra4,
"Tetra10Elem": elements_tetra10,
"Hexa8Elem": elements_hexa8,
"Hexa20Elem": elements_hexa20,
"Penta6Elem": elements_penta6,
"Penta15Elem": elements_penta15,
"Results": results
}