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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,52 @@ | ||
| import numpy as np | ||
| import opensees.openseespy as ops | ||
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| def space_truss(ns, Ro, Ri, H): | ||
| """Generate a 3D truss""" | ||
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| model = ops.Model(3,3) | ||
| m1 = model.material('default', 1.0) | ||
| s1 = model.xsection('default', 1.0, 1.0) | ||
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| # Specify node coordinates for support points | ||
| # angle for supports | ||
| phi = np.arange(ns)/ns*2*np.pi | ||
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| # Coordinates for support points | ||
| X = np.cos(phi)*Ro | ||
| Y = np.sin(phi)*Ro | ||
| # Generate support points with height Z of 0 | ||
| for i in range(ns): | ||
| model.node(i+1, X[i], Y[i], 0.0) | ||
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| # Angles for upper ring (offset by pi/ns degrees from supports) | ||
| phi = phi+np.pi/ns | ||
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| # Coordinates for upper ring | ||
| X = np.append(X, np.cos(phi)*Ri) | ||
| Y = np.append(Y, np.sin(phi)*Ri) | ||
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| # Generate coordinates for upper ring with height H | ||
| for i in np.arange(ns, 2*ns): | ||
| model.node(i+1, X[i], Y[i], H) | ||
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| for i, j, k in zip(np.arange(ns), np.arange(0, ns), np.arange(ns, 2*ns)): | ||
| model.element("Truss", i+1, j, k, m1, s1) | ||
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| model.element("Truss", alpha[ns+1], 0, 2*ns-1, m1, s1) | ||
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| for i, j, k in zip(np.arange(ns+1, 2*ns), np.arange(1, ns), np.arange(ns, 2*ns-1)): | ||
| model.element("Truss", i+1, j, k, m1, s1) | ||
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| for i, j, k in zip(np.arange(2*ns, 3*ns-1), np.arange(ns, 2*ns-1), np.arange(ns+1, 2*ns)): | ||
| model.element("Truss", i+1, j, k, m1, s1) | ||
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| model.element("Truss", 3*ns, ns, 2*ns-1, m1, s1) | ||
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| # boundary conditions | ||
| for node in range(ns): | ||
| model.fix(node, (1, 1, 1)) | ||
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| return model |
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| Original file line number | Diff line number | Diff line change |
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@@ -32,5 +32,5 @@ | |
| ) | ||
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| # sees.serve(artist) | ||
| # artist.save("gravity.glb") | ||
| artist.save("gravity.glb") | ||
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