71 lines
1.4 KiB
Python
71 lines
1.4 KiB
Python
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import matplotlib.pyplot as plt
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from math import sqrt
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import sys
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if __name__ == "__main__":
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try:
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stype = sys.argv[1]
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except IndexError:
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print("python fillet-radius.py [simple|bodyCentered|faceCentered]")
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exit(1)
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if stype == "simple":
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r0 = 1.0
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C1, C2 = 0.8, 0.5
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theta1, theta2 = 0.01, 0.28
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delta = 0.2
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elif stype == "bodyCentered":
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L = 1.0
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r0 = L * sqrt(3) / 4
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C1, C2 = 0.3, 0.2
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theta1, theta2 = 0.01, 0.18
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delta = 0.02
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elif stype == "faceCentered":
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L = 1.0
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r0 = L * sqrt(2) / 4
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C1, C2 = 0.3, 0.2
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theta1, theta2 = 0.01, 0.13
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delta = 0.012
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else:
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print("python fillet-radius.py [simple|bodyCentered|faceCentered]")
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exit(1)
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Cf = lambda theta: C1 + (C2 - C1) / (theta2 - theta1) * (theta - theta1)
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fillet = lambda theta: delta - Cf(theta) * (r0 / (1 - theta) - r0)
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tocount = lambda num: int(num * 100)
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theta = [ 0.01 * n for n in range(tocount(theta1), tocount(theta2) + 1) ]
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coeffs = [ Cf(n) for n in theta ]
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radiuses = [ fillet(n) for n in theta ]
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plt.figure(1)
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plt.subplot(211)
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plt.plot(theta, coeffs, "o")
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plt.grid(True)
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plt.ylabel("Cf")
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plt.subplot(212)
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plt.plot(theta, radiuses, "o")
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plt.grid(True)
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plt.ylabel("Radius")
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plt.xlabel("Theta")
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plt.show()
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