69 lines
2.9 KiB
Python
69 lines
2.9 KiB
Python
# ***************************************************************************
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# * Copyright (c) 2021 Bernd Hahnebach <bernd@bimstatik.org> *
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# * *
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# * This file is part of the FreeCAD CAx development system. *
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# * *
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# * This program is free software; you can redistribute it and/or modify *
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# * it under the terms of the GNU Lesser General Public License (LGPL) *
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# * as published by the Free Software Foundation; either version 2 of *
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# * the License, or (at your option) any later version. *
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# * for detail see the LICENCE text file. *
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# * *
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# * This program is distributed in the hope that it will be useful, *
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# * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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# * GNU Library General Public License for more details. *
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# * *
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# * You should have received a copy of the GNU Library General Public *
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# * License along with this program; if not, write to the Free Software *
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# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
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# * USA *
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# * *
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# ***************************************************************************
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__title__ = "FreeCAD FEM calculix constraint selfweight"
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__author__ = "Bernd Hahnebach"
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__url__ = "https://www.freecad.org"
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def get_analysis_types():
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return ["buckling", "static", "thermomech"]
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def get_constraint_title():
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return "Self weight Constraint"
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def get_before_write_constraint():
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return ""
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def get_after_write_constraint():
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return ""
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def write_constraint(f, femobj, selwei_obj, ccxwriter):
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# floats read from ccx should use {:.13G}, see comment in writer module
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f.write("*DLOAD\n")
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f.write(
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# elset, GRAV, magnitude, direction x, dir y ,dir z
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"{},GRAV,{:.13G},{:.13G},{:.13G},{:.13G}\n".format(
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ccxwriter.ccx_eall,
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selwei_obj.GravityAcceleration.getValueAs(
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"mm/s^2"
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).Value, # actual magnitude of gravity vector
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selwei_obj.GravityDirection.x, # coordinate x of normalized gravity vector
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selwei_obj.GravityDirection.y, # y
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selwei_obj.GravityDirection.z, # z
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)
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)
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f.write("\n")
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# grav (erdbeschleunigung) is equal for all elements
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# should be only one constraint
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# different element sets for different density
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# are written in the material element sets already
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