-
Notifications
You must be signed in to change notification settings - Fork 0
/
popFOAM.py
256 lines (205 loc) · 9.45 KB
/
popFOAM.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
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
import numpy as np
import re
class HydroCoeff:
"""
The HydroCoeff class represents the hydrodynamic coefficients of a system.
It calculates the damping and added mass based on the phase lag, hydrodynamic force, motion amplitude, and angular frequency.
Attributes:
_phaselag (float): The phase lag of the system.
_hydrodynamicforce (float): The hydrodynamic force acting on the system.
_motionamplitude (float): The amplitude of motion of the system.
_w (float): The angular frequency of the system.
_damping (float): The calculated damping of the system.
_addedmass (float): The calculated added mass of the system.
_restoring_coefficient (float): The calculated restoring coefficient of the system.
Methods:
__init__(self, phaselag: float, hydrodynamicforce: float, motionamplitude: float, w: float, rho: float, g: float, Awp: float):
Initializes the HydroCoeff object with the given phase lag, hydrodynamic force, motion amplitude, angular frequency, rho, g, and Awp.
It also calculates the damping, added mass, and restoring coefficient.
calculate_restoring_coefficient(self):
Calculates the restoring coefficient based on the given parameters.
calculate_damping(self):
Calculates the damping based on the hydrodynamic force, phase lag, motion amplitude, angular frequency, and restoring coefficient.
calculate_added_mass(self):
Calculates the added mass based on the hydrodynamic force, phase lag, motion amplitude, angular frequency, and restoring coefficient.
__str__(self):
Returns a string representation of the HydroCoeff object.
__repr__(self):
Returns a string representation of the HydroCoeff object that can be used to recreate the object.
phaselag(self) -> float:
Returns the phase lag.
phaselag(self, value: float):
Sets the phase lag to the given value and recalculates the damping, added mass, and restoring coefficient.
hydrodynamicforce(self) -> float:
Returns the hydrodynamic force.
hydrodynamicforce(self, value: float):
Sets the hydrodynamic force to the given value and recalculates the damping, added mass, and restoring coefficient.
motionamplitude(self) -> float:
Returns the motion amplitude.
motionamplitude(self, value: float):
Sets the motion amplitude to the given value and recalculates the damping, added mass, and restoring coefficient.
w(self) -> float:
Returns the angular frequency.
w(self, value: float):
Sets the angular frequency to the given value and recalculates the damping, added mass, and restoring coefficient.
damping(self) -> float:
Returns the damping.
addedmass(self) -> float:
Returns the added mass.
restoring_coefficient(self) -> float:
Returns the restoring coefficient.
"""
def __init__(self, phaselag: float, hydrodynamicforce: float, motionamplitude: float, w: float, rho: float, g: float, Awp: float):
"""
Initializes the HydroCoeff object with the given phase lag, hydrodynamic force, motion amplitude, angular frequency, rho, g, and Awp.
It also calculates the damping, added mass, and restoring coefficient.
"""
self._phaselag = phaselag
self._hydrodynamicforce = hydrodynamicforce
self._motionamplitude = motionamplitude
self._w = w
self._rho = rho
self._g = g
self._Awp = Awp
self._damping = None
self._addedmass = None
self._restoring_coefficient = None
self.calculate_restoring_coefficient()
self.calculate_damping()
self.calculate_added_mass()
def calculate_restoring_coefficient(self):
"""
Calculates the restoring coefficient based on the given parameters.
"""
self._restoring_coefficient = self._rho * self._g * self._Awp
def calculate_damping(self):
"""
Calculates the damping based on the hydrodynamic force, phase lag, motion amplitude, angular frequency, and restoring coefficient.
"""
self._damping = - (self._hydrodynamicforce - self._restoring_coefficient * self._motionamplitude) * np.sin(self._phaselag) / (self._motionamplitude * self._w)
def calculate_added_mass(self):
"""
Calculates the added mass based on the hydrodynamic force, phase lag, motion amplitude, angular frequency, and restoring coefficient.
"""
self._addedmass = (self._hydrodynamicforce - self._restoring_coefficient * self._motionamplitude) * np.cos(self._phaselag) / (self._motionamplitude * self._w ** 2)
def __str__(self):
"""
Returns a string representation of the HydroCoeff object.
"""
return f"HydroCoeff: phaselag={self._phaselag}, hydrodynamicforce={self._hydrodynamicforce}, motionamplitude={self._motionamplitude}, w={self._w}, damping={self._damping}, addedmass={self._addedmass}, restoring_coefficient={self._restoring_coefficient}"
def __repr__(self):
"""
Returns a string representation of the HydroCoeff object that can be used to recreate the object.
"""
return f"HydroCoeff(phaselag={self._phaselag}, hydrodynamicforce={self._hydrodynamicforce}, motionamplitude={self._motionamplitude}, w={self._w}, restoring_coefficient={self._restoring_coefficient})"
@property
def phaselag(self) -> float:
"""
Returns the phase lag.
"""
return self._phaselag
@phaselag.setter
def phaselag(self, value: float):
"""
Sets the phase lag to the given value and recalculates the damping, added mass, and restoring coefficient.
"""
self._phaselag = value
self.calculate_restoring_coefficient()
self.calculate_damping()
self.calculate_added_mass()
@property
def hydrodynamicforce(self) -> float:
"""
Returns the hydrodynamic force.
"""
return self._hydrodynamicforce
@hydrodynamicforce.setter
def hydrodynamicforce(self, value: float):
"""
Sets the hydrodynamic force to the given value and recalculates the damping, added mass, and restoring coefficient.
"""
self._hydrodynamicforce = value
self.calculate_restoring_coefficient()
self.calculate_damping()
self.calculate_added_mass()
@property
def motionamplitude(self) -> float:
"""
Returns the motion amplitude.
"""
return self._motionamplitude
@motionamplitude.setter
def motionamplitude(self, value: float):
"""
Sets the motion amplitude to the given value and recalculates the damping, added mass, and restoring coefficient.
"""
self._motionamplitude = value
self.calculate_restoring_coefficient()
self.calculate_damping()
self.calculate_added_mass()
@property
def w(self) -> float:
"""
Returns the angular frequency.
"""
return self._w
@w.setter
def w(self, value: float):
"""
Sets the angular frequency to the given value and recalculates the damping, added mass, and restoring coefficient.
"""
self._w = value
self.calculate_restoring_coefficient()
self.calculate_damping()
self.calculate_added_mass()
@property
def damping(self) -> float:
"""
Returns the damping.
"""
return self._damping
@property
def addedmass(self) -> float:
"""
Returns the added mass.
"""
return self._addedmass
@property
def restoring_coefficient(self) -> float:
"""
Returns the restoring coefficient.
"""
return self._restoring_coefficient
def process_line(line):
# Extract time value
time = float(line.split()[0])
# Extract the numeric values within parentheses
float_values = []
tokens = re.findall(r'\(([^)]+)\)', line)
for token in tokens:
# Removing any lingering parentheses and splitting by spaces
cleaned_values = token.replace('(', '').replace(')', '').split()
float_values.extend([float(x) for x in cleaned_values])
# Return time followed by the extracted float values
return [time] + float_values
def createForceFile(forces_file: str) -> tuple:
data = []
with open(forces_file, "r") as datafile:
for line in datafile:
if not line.startswith("#"):
data.append(tuple(process_line(line))) # Convert to tuple
# Define the dtype for the structured array
dtype = [('time', float),
('pressure_x', float), ('pressure_y', float), ('pressure_z', float),
('viscous_x', float), ('viscous_y', float), ('viscous_z', float),
('pressure_moment_x', float), ('pressure_moment_y', float), ('pressure_moment_z', float),
('viscous_moment_x', float), ('viscous_moment_y', float), ('viscous_moment_z', float)
]
# Create a structured NumPy array
data_array = np.array(data, dtype=dtype)
# Extract the required data
time = data_array['time']
forceX = data_array['pressure_x'] #+ data_array['viscous_x']
forceY = data_array['pressure_y'] #+ data_array['viscous_y']
forceZ = data_array['pressure_z'] + data_array['viscous_z']
return time, forceX, forceY, forceZ