-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathdeformabledisplacement.py
190 lines (166 loc) · 9.75 KB
/
deformabledisplacement.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
# -*- coding: utf-8 -*-
###################################################################################
#
# Copyright 2021 Jose Gabriel Egas Ortuno
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
#
#
###################################################################################
'''
This scripted object represents a deformable displacement joint
The syntax is:
joint: <label>,
deformable displacement joint,
<node1>, # a (static) node to which the joint is fixed
null, # relative offset
<node2>, # a dynamic node which will oscilate
null, # relative offset
linear viscoelastic isotropic,
<stiffness>, # spring stiffness
<viscosity>, # viscosity coefficient
prestrain, single, <direction>, const, <lenght>;
where:
label: an integer number to identify the joint, eg: 1,2,3...
node1: the label of the structural node to which the joint is fixed, eg: 1,2,3...
node2: the label of the structural node that oscilates, eg: 1,2,3...
stiffness: the spring stiffness coefficient in [N/m]
viscosity: the damper Damping Coefficient in [Ns/m]
direction: the direction in which the body will oscilate, for instance: 0., 0., -1
lenght: spring natural lenght in [m]
'''
#from FreeCAD import Units
import FreeCAD
import Draft
import FreeCADGui
class DeformableDisplacement:
def __init__(self, obj, label, node1, node2):
x = node1.position_X
y = node1.position_Y
z = node1.position_Z
x1 = node2.position_X
y1 = node2.position_Y
z1 = node2.position_Z
#Initial spring stiffness:
k = FreeCAD.Units.Quantity(1.0,FreeCAD.Units.Unit('N/m'))
#Initial damping coeficient (viscosity):
u = FreeCAD.Units.Quantity(0.003,FreeCAD.Units.Unit('N*s/m'))
#Initial oscilation directon:
d = '0., 0., -1'
#Initial lenght is the distance between the two nodes
aux = pow(pow((node2.position_X - node1.position_X),2) + pow((node2.position_Y - node1.position_Y),2) + pow((node2.position_Z - node1.position_Z),2),(0.5))
lenght = FreeCAD.Units.Quantity(aux,FreeCAD.Units.Unit('m'))
obj.addExtension("App::GroupExtensionPython", self)
obj.addProperty("App::PropertyString","joint","Deformable displacement joint","joint",1).joint = "deformable displacement joint"
obj.addProperty("App::PropertyString","label","Deformable displacement joint","label").label = str(label)
obj.addProperty("App::PropertyString","node_1","Deformable displacement joint","node_1").node_1 = str(node1.label)
obj.addProperty("App::PropertyString","node_2","Deformable displacement joint","node_2").node_2 = str(node2.label)
obj.addProperty("App::PropertyString","stiffness","Deformable displacement joint","stiffness").stiffness = str(k)
obj.addProperty("App::PropertyString","viscosity","Deformable displacement joint","viscosity").viscosity = str(u)
obj.addProperty("App::PropertyString","direction","Deformable displacement joint","direction").direction = d
obj.addProperty("App::PropertyDistance","lenght","Deformable displacement joint","lenght").lenght = lenght
obj.addProperty("App::PropertyDistance","position X","Initial absolute position","position X",1).position_X = x
obj.addProperty("App::PropertyDistance","position Y","Initial absolute position","position Y",1).position_Y = y
obj.addProperty("App::PropertyDistance","position Z","Initial absolute position","position Z",1).position_Z = z
obj.addProperty("App::PropertyString","force vector multiplier","Animation","force vector multiplier").force_vector_multiplier = '1'
obj.addProperty("App::PropertyString","frame","Animation","frame").frame = 'local'
obj.addProperty("App::PropertyString","animate","Animation","animate").animate = 'false'
obj.Proxy = self
length = FreeCAD.ActiveDocument.getObjectsByLabel("x: structural: " + node1.label)[0].Length.Value # Calculate the body characteristic length. Will be used to size the arrows that represent the node.
p1 = FreeCAD.Vector(0, 0, 0)
#Add x vector of the coordinate system:
p2 = FreeCAD.Vector(length, 0, 0)
l = Draft.makeLine(p1, p2)
l.Label = 'x: joint: '+ str(label)
l.ViewObject.LineColor = (1.00,0.00,0.00)
l.ViewObject.PointColor = (1.00,0.00,0.00)
l.Placement=FreeCAD.Placement(FreeCAD.Vector(x,y,z), FreeCAD.Rotation(FreeCAD.Vector(0,0,1),0), FreeCAD.Vector(0,0,0))
l.ViewObject.EndArrow = True
l.ViewObject.ArrowType = u"Arrow"
l.ViewObject.LineWidth = 1.00
l.ViewObject.PointSize = 1.00
#l.ViewObject.ArrowSize = str(length/15)+' mm'
l.ViewObject.Selectable = False
#Add y vector of the coordinate system:
p2 = FreeCAD.Vector(0, length, 0)
l = Draft.makeLine(p1, p2)
l.Label = 'y: joint: '+ str(label)
l.ViewObject.LineColor = (0.00,1.00,0.00)
l.ViewObject.PointColor = (0.00,1.00,0.00)
l.Placement=FreeCAD.Placement(FreeCAD.Vector(x,y,z), FreeCAD.Rotation(FreeCAD.Vector(0,0,1),0), FreeCAD.Vector(0,0,0))
l.ViewObject.EndArrow = True
l.ViewObject.ArrowType = u"Arrow"
l.ViewObject.LineWidth = 1.00
l.ViewObject.PointSize = 1.00
#l.ViewObject.ArrowSize = str(length/15)+' mm'
l.ViewObject.Selectable = False
#Add z vector of the coordinate system:
p2 = FreeCAD.Vector(0, 0, length)
l = Draft.makeLine(p1, p2)
l.Label = 'z: joint: '+ str(label)
l.ViewObject.ArrowType = u"Dot"
l.ViewObject.LineColor = (0.00,0.00,1.00)
l.ViewObject.PointColor = (0.00,0.00,1.00)
l.Placement=FreeCAD.Placement(FreeCAD.Vector(x,y,z), FreeCAD.Rotation(FreeCAD.Vector(0,0,1),0), FreeCAD.Vector(0,0,0))
l.ViewObject.EndArrow = True
l.ViewObject.LineWidth = 1.00
l.ViewObject.PointSize = 1.00
#l.ViewObject.ArrowSize = str(length/15)+' mm'
l.ViewObject.Selectable = False
#Add the vector to visualize reaction forces
Llength = FreeCAD.Units.Quantity(FreeCAD.ActiveDocument.getObjectsByLabel("X")[0].End[0]/4,FreeCAD.Units.Unit('mm'))
p1 = FreeCAD.Vector(x, y, z)
p2 = FreeCAD.Vector(x+Llength, y+Llength, z+Llength)
d = Draft.makeLine(p1, p2)
d.ViewObject.LineColor = (1.00,0.00,0.00)
d.ViewObject.PointColor = (1.00,0.00,0.00)
d.ViewObject.LineWidth = 1.00
d.ViewObject.PointSize = 1.00
d.ViewObject.EndArrow = True
d.ViewObject.ArrowType = u"Arrow"
#d.ViewObject.ArrowSize = str(length/15)#+' mm'
d.ViewObject.Selectable = False
d.Label = "jf: "+ str(label)
#add the spring
h = FreeCAD.ActiveDocument.addObject("Part::Helix","sp: "+ str(label))
h.Label = "sp: "+ str(label)
h.Pitch=2.00
h.Height= pow (( pow((x1 - x),2) + pow((y1 - y),2) + pow((z1 - z),2) ), 1/2)
h.Radius=Llength.Value/10
h.Angle=0.00
h.Placement = FreeCAD.Placement(FreeCAD.Vector(x,y,z), FreeCAD.Rotation(0,0,0), FreeCAD.Vector(0,0,0))
FreeCAD.ActiveDocument.recompute()
def onChanged(self, fp, prop):
'''Do something when a property has changed'''
try:
if (len(FreeCADGui.Selection.getSelection()) == 1):
#Get the new position and orientation
x = FreeCADGui.Selection.getSelection()[0].position_X
y = FreeCADGui.Selection.getSelection()[0].position_Y
z = FreeCADGui.Selection.getSelection()[0].position_Z
yaw = FreeCADGui.Selection.getSelection()[0].yaw
pitch = FreeCADGui.Selection.getSelection()[0].pitch
roll = FreeCADGui.Selection.getSelection()[0].roll
#Move the arrows and text
FreeCAD.ActiveDocument.getObjectsByLabel("x: joint: "+FreeCADGui.Selection.getSelection()[0].Label[-1])[0].Placement=FreeCAD.Placement(FreeCAD.Vector(x,y,z), FreeCAD.Rotation(yaw,pitch,roll), FreeCAD.Vector(0,0,0))
FreeCAD.ActiveDocument.getObjectsByLabel("y: joint: "+FreeCADGui.Selection.getSelection()[0].Label[-1])[0].Placement=FreeCAD.Placement(FreeCAD.Vector(x,y,z), FreeCAD.Rotation(yaw,pitch,roll), FreeCAD.Vector(0,0,0))
FreeCAD.ActiveDocument.getObjectsByLabel("z: joint: "+FreeCADGui.Selection.getSelection()[0].Label[-1])[0].Placement=FreeCAD.Placement(FreeCAD.Vector(x,y,z), FreeCAD.Rotation(yaw,pitch,roll), FreeCAD.Vector(0,0,0))
FreeCAD.ActiveDocument.getObjectsByLabel("i: joint: "+FreeCADGui.Selection.getSelection()[0].Label[-1])[0].Placement=FreeCAD.Placement(FreeCAD.Vector(x,y,z), FreeCAD.Rotation(yaw,pitch,roll), FreeCAD.Vector(0,0,0))
except:
return True
def execute(self, fp):
'''Do something when doing a recomputation, this method is mandatory'''
FreeCAD.Console.PrintMessage("Recompute Python Box feature\n")