| # *************************************************************************** | |
| # * 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 constraint pressure" | |
| __author__ = "Bernd Hahnebach" | |
| __url__ = "https://www.freecad.org" | |
| import FreeCAD | |
| def get_analysis_types(): | |
| return ["buckling", "static", "thermomech"] | |
| def get_sets_name(): | |
| return "constraints_pressure_element_face_loads" | |
| def get_before_write_meshdata_constraint(): | |
| return "" | |
| def get_after_write_meshdata_constraint(): | |
| return "" | |
| def write_meshdata_constraint(f, femobj, prs_obj, ccxwriter): | |
| # floats read from ccx should use {:.13G}, see comment in writer module | |
| if prs_obj.EnableAmplitude: | |
| f.write(f"*DLOAD, AMPLITUDE={prs_obj.Name}\n") | |
| else: | |
| f.write("*DLOAD\n") | |
| rev = -1 if prs_obj.Reversed else 1 | |
| # the pressure has to be output in MPa | |
| pressure = prs_obj.Pressure.getValueAs("MPa").Value | |
| pressure *= rev | |
| for feat, surf, is_sub_el in femobj["PressureFaces"]: | |
| f.write("** {0.Name}.{1[0]}\n".format(*feat)) | |
| if is_sub_el: | |
| for elem, fno in surf: | |
| f.write(f"{elem},P{fno},{pressure}\n") | |
| else: | |
| for elem in surf: | |
| f.write(f"{elem},P,{-1*pressure}\n") | |