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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 calculix write inpfile femelement geometry"
__author__ = "Bernd Hahnebach"
__url__ = "https://www.freecad.org"
def write_femelement_geometry(f, ccxwriter):
# floats read from ccx should use {:.13G}, see comment in writer module
f.write("\n{}\n".format(59 * "*"))
f.write("** Sections\n")
for matgeoset in ccxwriter.mat_geo_sets:
if matgeoset["ccx_elset"]:
elsetdef = "ELSET={}, ".format(matgeoset["ccx_elset_name"])
material = "MATERIAL={}".format(matgeoset["mat_obj_name"])
if "beamsection_obj" in matgeoset: # beam mesh
beamsec_obj = matgeoset["beamsection_obj"]
beam_axis_m = matgeoset["beam_axis_m"]
# in CalxuliX called the 1direction
# see meshtools.get_beam_main_axis_m(beam_direction, defined_angle)
section_nor = "{:.13G}, {:.13G}, {:.13G}\n".format(
beam_axis_m[0], beam_axis_m[1], beam_axis_m[2]
)
if ccxwriter.solver_obj.ExcludeBendingStiffness:
area = beamsec_obj.TrussArea.getValueAs("mm^2").Value
section_def = f"*SOLID SECTION, {elsetdef}{material}\n"
section_geo = f"{area:.13G}\n"
else:
if beamsec_obj.SectionType == "Rectangular":
# see meshtools.get_beam_main_axis_m(beam_direction, defined_angle)
# the method get_beam_main_axis_m() which calculates the beam_axis_m vector
# unless rotated, this vector points towards +y axis
# doesn't follow 1,2-direction order of CalculiX
# ^ (n, 2-direction)
# |
# |
# .----> (m, 1-direction)
#
len_beam_axis_n = beamsec_obj.RectHeight.getValueAs("mm").Value
len_beam_axis_m = beamsec_obj.RectWidth.getValueAs("mm").Value
section_type = ", SECTION=RECT"
section_geo = f"{len_beam_axis_m:.13G},{len_beam_axis_n:.13G}\n"
section_def = f"*BEAM SECTION, {elsetdef}{material}{section_type}\n"
elif beamsec_obj.SectionType == "Circular":
diameter = beamsec_obj.CircDiameter.getValueAs("mm").Value
section_type = ", SECTION=CIRC"
section_geo = f"{diameter:.13G}\n"
section_def = f"*BEAM SECTION, {elsetdef}{material}{section_type}\n"
elif beamsec_obj.SectionType == "Elliptical":
axis1 = beamsec_obj.Axis1Length.getValueAs("mm").Value
axis2 = beamsec_obj.Axis2Length.getValueAs("mm").Value
section_type = ", SECTION=CIRC"
section_geo = f"{axis1:.13G},{axis2:.13G}\n"
section_def = f"*BEAM SECTION, {elsetdef}{material}{section_type}\n"
elif beamsec_obj.SectionType == "Pipe":
radius = 0.5 * beamsec_obj.PipeDiameter.getValueAs("mm").Value
thickness = beamsec_obj.PipeThickness.getValueAs("mm").Value
section_type = ", SECTION=PIPE"
section_geo = f"{radius:.13G},{thickness:.13G}\n"
section_def = f"*BEAM SECTION, {elsetdef}{material}{section_type}\n"
elif beamsec_obj.SectionType == "Box":
box_width = beamsec_obj.BoxWidth.getValueAs("mm").Value
box_height = beamsec_obj.BoxHeight.getValueAs("mm").Value
box_t1 = beamsec_obj.BoxT1.getValueAs("mm").Value
box_t2 = beamsec_obj.BoxT2.getValueAs("mm").Value
box_t3 = beamsec_obj.BoxT3.getValueAs("mm").Value
box_t4 = beamsec_obj.BoxT4.getValueAs("mm").Value
section_type = ", SECTION=BOX"
section_geo = f"{box_width:.13G},{box_height:.13G},{box_t1:.13G},{box_t2:.13G},{box_t3:.13G},{box_t4:.13G}\n"
section_def = f"*BEAM SECTION, {elsetdef}{material}{section_type}\n"
f.write(section_def)
f.write(section_geo)
if not ccxwriter.solver_obj.ExcludeBendingStiffness:
f.write(section_nor)
elif "fluidsection_obj" in matgeoset: # fluid mesh
fluidsec_obj = matgeoset["fluidsection_obj"]
if fluidsec_obj.SectionType == "Liquid":
section_type = fluidsec_obj.LiquidSectionType
if (section_type == "PIPE INLET") or (section_type == "PIPE OUTLET"):
section_type = "PIPE INOUT"
section_def = "*FLUID SECTION, {}TYPE={}, {}\n".format(
elsetdef, section_type, material
)
section_geo = liquid_section_def(fluidsec_obj, section_type)
"""
# deactivate as it would result in section_def and section_geo not defined
# deactivated in the App and Gui object and thus in the task panel as well
elif fluidsec_obj.SectionType == "Gas":
section_type = fluidsec_obj.GasSectionType
elif fluidsec_obj.SectionType == "Open Channel":
section_type = fluidsec_obj.ChannelSectionType
"""
f.write(section_def)
f.write(section_geo)
elif "shellthickness_obj" in matgeoset: # shell mesh
shellth_obj = matgeoset["shellthickness_obj"]
if ccxwriter.solver_obj.ModelSpace == "3D":
offset = shellth_obj.Offset
if ccxwriter.solver_obj.ExcludeBendingStiffness:
section_def = (
f"*MEMBRANE SECTION, {elsetdef}{material}, OFFSET={offset:.13G}\n"
)
else:
section_def = (
f"*SHELL SECTION, {elsetdef}{material}, OFFSET={offset:.13G}\n"
)
else:
section_def = f"*SOLID SECTION, {elsetdef}{material}\n"
thickness = shellth_obj.Thickness.getValueAs("mm").Value
section_geo = f"{thickness:.13G}\n"
f.write(section_def)
f.write(section_geo)
else: # solid mesh
section_def = f"*SOLID SECTION, {elsetdef}{material}\n"
f.write(section_def)
# ************************************************************************************************
# Helpers
def liquid_section_def(obj, section_type):
if section_type == "PIPE MANNING":
manning_area = obj.ManningArea.getValueAs("mm^2").Value
manning_radius = obj.ManningRadius.getValueAs("mm").Value
manning_coefficient = obj.ManningCoefficient
section_geo = "{:.13G},{:.13G},{:.13G}\n".format(
manning_area, manning_radius, manning_coefficient
)
return section_geo
elif section_type == "PIPE ENLARGEMENT":
enlarge_area1 = obj.EnlargeArea1.getValueAs("mm^2").Value
enlarge_area2 = obj.EnlargeArea2.getValueAs("mm^2").Value
section_geo = f"{enlarge_area1:.13G},{enlarge_area2:.13G}\n"
return section_geo
elif section_type == "PIPE CONTRACTION":
contract_area1 = obj.ContractArea1.getValueAs("mm^2").Value
contract_area2 = obj.ContractArea2.getValueAs("mm^2").Value
section_geo = f"{contract_area1:.13G},{contract_area2:.13G}\n"
return section_geo
elif section_type == "PIPE ENTRANCE":
entrance_pipe_area = obj.EntrancePipeArea.getValueAs("mm^2").Value
entrance_area = obj.EntranceArea.getValueAs("mm^2").Value
section_geo = f"{entrance_pipe_area:.13G},{entrance_area:.13G}\n"
return section_geo
elif section_type == "PIPE DIAPHRAGM":
diaphragm_pipe_area = obj.DiaphragmPipeArea.getValueAs("mm^2").Value
diaphragm_area = obj.DiaphragmArea.getValueAs("mm^2").Value
section_geo = f"{diaphragm_pipe_area:.13G},{diaphragm_area:.13G}\n"
return section_geo
elif section_type == "PIPE BEND":
bend_pipe_area = obj.BendPipeArea.getValueAs("mm^2").Value
bend_radius_diameter = obj.BendRadiusDiameter
bend_angle = obj.BendAngle
bend_loss_coefficient = obj.BendLossCoefficient
section_geo = "{:.13G},{:.13G},{:.13G},{:.13G}\n".format(
bend_pipe_area, bend_radius_diameter, bend_angle, bend_loss_coefficient
)
return section_geo
elif section_type == "PIPE GATE VALVE":
gatevalve_pipe_area = obj.GateValvePipeArea.getValueAs("mm^2").Value
gatevalve_closing_coeff = obj.GateValveClosingCoeff
section_geo = f"{gatevalve_pipe_area:.13G},{gatevalve_closing_coeff:.13G}\n"
return section_geo
elif section_type == "PIPE WHITE-COLEBROOK":
colebrooke_area = obj.ColebrookeArea.getValueAs("mm^2").Value
colebrooke_diameter = 2 * obj.ColebrookeRadius.getValueAs("mm")
colebrooke_grain_diameter = obj.ColebrookeGrainDiameter.getValueAs("mm")
colebrooke_form_factor = obj.ColebrookeFormFactor
section_geo = "{:.13G},{:.13G},{},{:.13G},{:.13G}\n".format(
colebrooke_area,
colebrooke_diameter,
"-1",
colebrooke_grain_diameter,
colebrooke_form_factor,
)
return section_geo
elif section_type == "LIQUID PUMP":
section_geo = ""
for i in range(len(obj.PumpFlowRate)):
flow_rate = obj.PumpFlowRate[i]
top = obj.PumpHeadLoss[i]
section_geo = f"{section_geo + flow_rate:.13G},{top:.13G},\n"
section_geo = f"{section_geo}\n"
return section_geo
else:
return ""
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