| # *************************************************************************** | |
| # * 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 force" | |
| __author__ = "Bernd Hahnebach" | |
| __url__ = "https://www.freecad.org" | |
| def get_analysis_types(): | |
| return ["buckling", "static", "thermomech"] | |
| def get_sets_name(): | |
| return "constraints_force_node_loads" | |
| def get_before_write_meshdata_constraint(): | |
| return "" | |
| def get_after_write_meshdata_constraint(): | |
| return "" | |
| def write_meshdata_constraint(f, femobj, force_obj, ccxwriter): | |
| # floats read from ccx should use {:.13G}, see comment in writer module | |
| if force_obj.EnableAmplitude: | |
| f.write(f"*CLOAD, AMPLITUDE={force_obj.Name}\n") | |
| else: | |
| f.write("*CLOAD\n") | |
| direction_vec = femobj["Object"].DirectionVector | |
| dir_zero_tol = 1e-15 # TODO: should this be more generally for more values? | |
| # be careful with raising the tolerance, a big load would have an impact | |
| # but compared to the real direction the impact would be small again | |
| for ref_shape in femobj["NodeLoadTable"]: | |
| f.write(f"** {ref_shape[0]}\n") | |
| for n in sorted(ref_shape[1]): | |
| node_load = ref_shape[1][n] | |
| # the loads in ref_shape[1][n] are without unit | |
| if abs(direction_vec.x) > dir_zero_tol: | |
| v1 = f"{(direction_vec.x * node_load).Value:.13G}" | |
| f.write(f"{n},1,{v1}\n") | |
| if abs(direction_vec.y) > dir_zero_tol: | |
| v2 = f"{(direction_vec.y * node_load).Value:.13G}" | |
| f.write(f"{n},2,{v2}\n") | |
| if abs(direction_vec.z) > dir_zero_tol: | |
| v3 = f"{(direction_vec.z * node_load).Value:.13G}" | |
| f.write(f"{n},3,{v3}\n") | |
| f.write("\n") | |
| f.write("\n") | |