166 lines
6.0 KiB
Python
166 lines
6.0 KiB
Python
# ***************************************************************************
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# * *
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# * Copyright (c) 2016 - Bernd Hahnebach <bernd@bimstatik.org> *
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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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import FreeCAD
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import os
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from math import pow, sqrt
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__title__ = "FreeCAD Z88 Disp Reader"
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__author__ = "Bernd Hahnebach "
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__url__ = "http://www.freecadweb.org"
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Debug = False
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if open.__module__ == '__builtin__':
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pyopen = open # because we'll redefine open below
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def open(filename):
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"called when freecad opens a file"
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docname = os.path.splitext(os.path.basename(filename))[0]
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insert(filename, docname)
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def insert(filename, docname):
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"called when freecad wants to import a file"
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try:
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doc = FreeCAD.getDocument(docname)
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except NameError:
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doc = FreeCAD.newDocument(docname)
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FreeCAD.ActiveDocument = doc
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import_z88_disp(filename)
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def import_z88_disp(filename, analysis=None, result_name_prefix=None):
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'''insert a FreeCAD FEM Result object in the ActiveDocument
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'''
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m = read_z88_disp(filename)
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if(len(m['Nodes']) > 0):
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if analysis is None:
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analysis_name = os.path.splitext(os.path.basename(filename))[0]
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import FemAnalysis
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analysis_object = FemAnalysis.makeFemAnalysis('Analysis')
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analysis_object.Label = analysis_name
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else:
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analysis_object = analysis # see if statement few lines later, if not analysis -> no FemMesh object is created !
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for result_set in m['Results']:
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results_name = result_name_prefix + 'results'
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results = FreeCAD.ActiveDocument.addObject('Fem::FemResultObject', results_name)
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for m in analysis_object.Member:
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if m.isDerivedFrom("Fem::FemMeshObject"):
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results.Mesh = m
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break
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disp = result_set['disp']
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l = len(disp)
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displacement = []
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for k, v in disp.iteritems():
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displacement.append(v)
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x_max, y_max, z_max = map(max, zip(*displacement))
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scale = 1.0
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if len(disp) > 0:
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results.DisplacementVectors = map((lambda x: x * scale), disp.values())
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results.NodeNumbers = disp.keys()
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x_min, y_min, z_min = map(min, zip(*displacement))
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sum_list = map(sum, zip(*displacement))
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x_avg, y_avg, z_avg = [i / l for i in sum_list]
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s_max = max(results.StressValues)
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s_min = min(results.StressValues)
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s_avg = sum(results.StressValues) / l
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disp_abs = []
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for d in displacement:
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disp_abs.append(sqrt(pow(d[0], 2) + pow(d[1], 2) + pow(d[2], 2)))
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results.DisplacementLengths = disp_abs
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a_max = max(disp_abs)
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a_min = min(disp_abs)
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a_avg = sum(disp_abs) / l
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results.Stats = [x_min, x_avg, x_max,
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y_min, y_avg, y_max,
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z_min, z_avg, z_max,
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a_min, a_avg, a_max,
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s_min, s_avg, s_max]
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analysis_object.Member = analysis_object.Member + [results]
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if(FreeCAD.GuiUp):
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import FemGui
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FemGui.setActiveAnalysis(analysis_object)
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def read_z88_disp(z88_disp_input):
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'''
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read a z88 disp file and extract the nodes and elements
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z88 Displacment output file is z88o2.txt
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works with Z88OS14
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pure usage:
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import FemToolsZ88
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fea = FemToolsZ88.FemToolsZ88()
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import z88dispReader
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disp_file = '/pathtofile/z88o2.txt'
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z88DispReader.import_z88_disp(disp_file , fea.analysis)
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The FreeCAD file needs to have an Analysis and an appropiate FEM Mesh
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'''
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nodes = {}
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mode_disp = {}
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mode_results = {}
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results = []
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z88_disp_file = pyopen(z88_disp_input, "r")
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for no, line in enumerate(z88_disp_file):
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lno = no + 1
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linelist = line.split()
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if lno >= 6:
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# disp line
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# print(linelist)
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node_no = int(linelist[0])
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mode_disp_x = float(linelist[1])
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mode_disp_y = float(linelist[2])
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if len(linelist) > 3:
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mode_disp_z = float(linelist[3])
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else:
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mode_disp_z = 0.0
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mode_disp[node_no] = FreeCAD.Vector(mode_disp_x, mode_disp_y, mode_disp_z)
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nodes[node_no] = node_no
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mode_results['disp'] = mode_disp
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results.append(mode_results)
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if Debug:
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for r in results[0]['disp']:
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print(r, ' --> ', results[0]['disp'][r])
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z88_disp_file.close()
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return {'Nodes': nodes, 'Results': results}
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