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# * Copyright (c) 2021 Bernd Hahnebach <bernd@bimstatik.org> *
# * *
# * This file is part of the FreeCAD CAx development system. *
# * *
# * This program is free software; you can redistribute it and/or modify *
# * it under the terms of the GNU Lesser General Public License (LGPL) *
# * as published by the Free Software Foundation; either version 2 of *
# * the License, or (at your option) any later version. *
# * for detail see the LICENCE text file. *
# * *
# * This program is distributed in the hope that it will be useful, *
# * but WITHOUT ANY WARRANTY; without even the implied warranty of *
# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
# * GNU Library General Public License for more details. *
# * *
# * You should have received a copy of the GNU Library General Public *
# * License along with this program; if not, write to the Free Software *
# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
# * USA *
# * *
# ***************************************************************************
__title__ = "FreeCAD FEM solver Mystran tasks"
__author__ = "Bernd Hahnebach"
__url__ = "https://www.freecad.org"
## \addtogroup FEM
# @{
import os
import os.path
import subprocess
import FreeCAD
try:
import hfcMystranNeuIn
result_reading = True
except Exception:
FreeCAD.Console.PrintWarning("Module to read results not found.\n")
result_reading = False
from . import writer
from .. import run
from .. import settings
from femmesh import meshsetsgetter
from femtools import femutils
from femtools import membertools
_inputFileName = None
class Check(run.Check):
def run(self):
self.pushStatus("Checking analysis member...\n")
self.check_mesh_exists()
self.check_material_exists()
self.check_material_single() # no multiple material
self.check_geos_beamsection_single() # no multiple beamsection
self.check_geos_shellthickness_single() # no multiple shellsection
self.check_geos_beamsection_and_shellthickness() # either beams or shells
class Prepare(run.Prepare):
def run(self):
global _inputFileName
self.pushStatus("Preparing solver input...\n")
# get mesh set data
# TODO see calculix tasks get mesh set data
mesh_obj = membertools.get_mesh_to_solve(self.analysis)[0] # pre check done already
meshdatagetter = meshsetsgetter.MeshSetsGetter(
self.analysis,
self.solver,
mesh_obj,
membertools.AnalysisMember(self.analysis),
)
meshdatagetter.get_mesh_sets()
# write solver input
w = writer.FemInputWriterMystran(
self.analysis,
self.solver,
mesh_obj,
meshdatagetter.member,
self.directory,
)
path = w.write_solver_input()
# report to user if task succeeded
if path != "":
self.pushStatus("Writing solver input completed.")
else:
self.pushStatus("Writing solver input failed.")
self.fail()
_inputFileName = os.path.splitext(os.path.basename(path))[0]
class Solve(run.Solve):
def run(self):
self.pushStatus("Executing solver...\n")
infile = _inputFileName + ".bdf"
# get solver binary
self.pushStatus("Get solver binary...\n")
binary = settings.get_binary("Mystran")
if binary is None:
self.fail() # a print has been made in settings module
# run solver
self.pushStatus("Executing solver...\n")
self._process = subprocess.Popen(
args=[binary, infile], # pass empty param fails! [binary, "", infile]
cwd=self.directory,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
)
self.signalAbort.add(self._process.terminate)
self._process.communicate()
self.signalAbort.remove(self._process.terminate)
# for chatching the output see CalculiX or Elmer solver tasks module
class Results(run.Results):
def run(self):
prefs = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/Fem/General")
if not prefs.GetBool("KeepResultsOnReRun", False):
self.purge_results()
if result_reading is True:
self.load_results()
def purge_results(self):
self.pushStatus("Purge existing results...\n")
# TODO see calculix result tasks
for m in membertools.get_member(self.analysis, "Fem::FemResultObject"):
if femutils.is_of_type(m.Mesh, "Fem::MeshResult"):
self.analysis.Document.removeObject(m.Mesh.Name)
self.analysis.Document.removeObject(m.Name)
self.analysis.Document.recompute()
def load_results(self):
self.pushStatus("Import new results...\n")
neu_result_file = os.path.join(self.directory, _inputFileName + ".NEU")
if os.path.isfile(neu_result_file):
hfcMystranNeuIn.import_neu(neu_result_file)
# Workaround to move result object into analysis
for o in self.analysis.Document.Objects:
if o.Name == "Displacement0":
self.analysis.addObject(o)
break
else:
# TODO: use solver framework status message system
FreeCAD.Console.PrintError(f"FEM: No results found at {neu_result_file}!\n")
self.fail()
## @}
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