def test_lb_Stiffener1D(): print('Testing linear buckling for StiffPanelBay with a 1D Stiffener') spb = StiffPanelBay() spb.a = 1. spb.b = 0.5 spb.stack = [0, 90, 90, 0] spb.plyt = 1e-3 * 0.125 spb.laminaprop = (142.5e9, 8.7e9, 0.28, 5.1e9, 5.1e9, 5.1e9) spb.model = 'plate_clt_donnell_bardell' spb.mu = 1.3e3 spb.m = 15 spb.n = 16 spb.add_panel(y1=0, y2=spb.b / 2., plyt=spb.plyt, Nxx=-1.) spb.add_panel(y1=spb.b / 2., y2=spb.b, plyt=spb.plyt, Nxx_cte=1000.) spb.add_bladestiff1d(ys=spb.b / 2., Fx=0., bf=0.05, fstack=[0, 90, 90, 0], fplyt=spb.plyt, flaminaprop=spb.laminaprop) k0 = spb.calc_k0(silent=True) kG = spb.calc_kG0(silent=True) eigvals, eigvecs = lb(k0, kG, silent=True) assert np.isclose(eigvals[0].real, 297.54633, atol=0.1, rtol=0)
def test_freq_Stiffener1D(): print('Testing frequency analysis for StiffPanelBay with a 1D Stiffener') spb = StiffPanelBay() spb.a = 2. spb.b = 0.5 spb.stack = [0, 90, 90, 0] spb.plyt = 1e-3 * 0.125 spb.laminaprop = (142.5e9, 8.7e9, 0.28, 5.1e9, 5.1e9, 5.1e9) spb.model = 'plate_clt_donnell_bardell' spb.mu = 1.3e3 spb.m = 15 spb.n = 16 spb.add_panel(y1=0, y2=spb.b / 2., plyt=spb.plyt) spb.add_panel(y1=spb.b / 2., y2=spb.b, plyt=spb.plyt) spb.add_bladestiff1d(ys=spb.b / 2., Fx=0., bf=0.08, fstack=[0, 90, 90, 0] * 5, fplyt=spb.plyt, flaminaprop=spb.laminaprop) k0 = spb.calc_k0(silent=True) M = spb.calc_kM(silent=True) eigvals, eigvecs = freq(k0, M, silent=True, num_eigvalues=10) assert np.isclose(eigvals[0].real, 79.5906673583, atol=0.1, rtol=0)
def test_Lee_and_Lee_table4(): print('Testing Lee and Lee Table 4') # Lee and Lee. "Vibration analysis of anisotropic plates with eccentric # stiffeners". Computers & Structures, Vol. 57, No. 1, pp. 99-105, # 1995. models = (('model4', 0.00208, 0.0060, 138.99917796302756), ('model5', 0.00260, 0.0075, 175.00597239286196), ('model7', 0.00364, 0.0105, 205.433509024)) for model, hf, bf, value in models: spb = StiffPanelBay() spb.model = 'plate_clt_donnell_bardell' spb.mu = 1.500e3 # plate material density in kg / m^3 spb.laminaprop = (128.e9, 11.e9, 0.25, 4.48e9, 1.53e9, 1.53e9) spb.stack = [0, -45, +45, 90, 90, +45, -45, 0] plyt = 0.00013 spb.plyt = plyt spb.a = 0.5 spb.b = 0.250 spb.m = 14 spb.n = 15 hf = hf bf = bf n = int(hf / plyt) fstack = [0] * (n // 4) + [90] * (n // 4) + [90] * (n // 4) + [0] * (n // 4) # clamping spb.w1rx = 0. spb.w2rx = 0. spb.w1ry = 0. spb.w2ry = 0. spb.add_panel(y1=0, y2=spb.b / 2.) spb.add_panel(y1=spb.b / 2., y2=spb.b) spb.add_bladestiff1d(mu=spb.mu, ys=spb.b / 2., bb=0., bf=bf, fstack=fstack, fplyt=plyt, flaminaprop=spb.laminaprop) k0 = spb.calc_k0(silent=True) M = spb.calc_kM(silent=True) eigvals, eigvecs = freq(k0, M, silent=True) herz = eigvals[0].real / 2 / np.pi assert np.isclose(herz, value, atol=0.001, rtol=0.001)
def test_Lee_and_Lee_table4(): print('Testing Lee and Lee Table 4') # Lee and Lee. "Vibration analysis of anisotropic plates with eccentric # stiffeners". Computers & Structures, Vol. 57, No. 1, pp. 99-105, # 1995. models = ( ('model4', 0.00208, 0.0060, 138.99917796302756), ('model5', 0.00260, 0.0075, 175.00597239286196), ('model7', 0.00364, 0.0105, 205.433509024)) for model, hf, bf, value in models: spb = StiffPanelBay() spb.model = 'plate_clt_donnell_bardell' spb.mu = 1.500e3 # plate material density in kg / m^3 spb.laminaprop = (128.e9, 11.e9, 0.25, 4.48e9, 1.53e9, 1.53e9) spb.stack = [0, -45, +45, 90, 90, +45, -45, 0] plyt = 0.00013 spb.plyt = plyt spb.a = 0.5 spb.b = 0.250 spb.m = 14 spb.n = 15 hf = hf bf = bf n = int(hf/plyt) fstack = [0]*(n//4) + [90]*(n//4) + [90]*(n//4) + [0]*(n//4) # clamping spb.w1rx = 0. spb.w2rx = 0. spb.w1ry = 0. spb.w2ry = 0. spb.add_panel(y1=0, y2=spb.b/2.) spb.add_panel(y1=spb.b/2., y2=spb.b) spb.add_bladestiff1d(mu=spb.mu, ys=spb.b/2., bb=0., bf=bf, fstack=fstack, fplyt=plyt, flaminaprop=spb.laminaprop) k0 = spb.calc_k0(silent=True) M = spb.calc_kM(silent=True) eigvals, eigvecs = freq(k0, M, silent=True) herz = eigvals[0].real/2/np.pi assert np.isclose(herz, value, atol=0.001, rtol=0.001)
def test_freq_Stiffener1D(): print('Testing frequency analysis for StiffPanelBay with a 1D Stiffener') spb = StiffPanelBay() spb.a = 1. spb.b = 0.5 spb.stack = [0, 90, 90, 0] spb.plyt = 1e-3*0.125 spb.laminaprop = (142.5e9, 8.7e9, 0.28, 5.1e9, 5.1e9, 5.1e9) spb.model = 'plate_clt_donnell_bardell' spb.mu = 1.3e3 spb.m = 15 spb.n = 16 spb.add_panel(y1=0, y2=spb.b/2., plyt=spb.plyt) spb.add_panel(y1=spb.b/2., y2=spb.b, plyt=spb.plyt) spb.add_bladestiff1d(ys=spb.b/2., Fx=0., bf=0.08, fstack=[0, 90, 90, 0]*5, fplyt=spb.plyt, flaminaprop=spb.laminaprop) spb.freq(silent=True, atype=4) assert np.isclose(spb.eigvals[0].real, 81.9342050889)
def test_lb_Stiffener1D(): print('Testing linear buckling for StiffPanelBay with a 1D Stiffener') spb = StiffPanelBay() spb.a = 1. spb.b = 0.5 spb.stack = [0, 90, 90, 0] spb.plyt = 1e-3*0.125 spb.laminaprop = (142.5e9, 8.7e9, 0.28, 5.1e9, 5.1e9, 5.1e9) spb.model = 'plate_clt_donnell_bardell' spb.mu = 1.3e3 spb.m = 15 spb.n = 16 spb.add_panel(y1=0, y2=spb.b/2., plyt=spb.plyt, Nxx=-1.) spb.add_panel(y1=spb.b/2., y2=spb.b, plyt=spb.plyt, Nxx_cte=1000.) spb.add_bladestiff1d(ys=spb.b/2., Fx=0., bf=0.05, fstack=[0, 90, 90, 0], fplyt=spb.plyt, flaminaprop=spb.laminaprop) spb.lb(silent=True) assert np.isclose(spb.eigvals[0].real, 297.54633249887456)
def test_Lee_and_Lee_table4(): print('Testing Lee and Lee Table 4') # Lee and Lee. "Vibration analysis of anisotropic plates with eccentric # stiffeners". Computers & Structures, Vol. 57, No. 1, pp. 99-105, # 1995. models = ( ('model4', 0.00208, 0.0060, 138.801067988), ('model5', 0.00260, 0.0075, 174.624343202), ('model7', 0.00364, 0.0105, 205.433509024)) for model, hf, bf, value in models: spb = StiffPanelBay() spb.model = 'plate_clt_donnell_bardell' spb.mu = 1.500e3 # plate material density in kg / m^3 spb.laminaprop = (128.e9, 11.e9, 0.25, 4.48e9, 1.53e9, 1.53e9) spb.stack = [0, -45, +45, 90, 90, +45, -45, 0] plyt = 0.00013 spb.plyt = plyt spb.a = 0.5 spb.b = 0.250 spb.m = 14 spb.n = 15 hf = hf bf = bf n = int(hf/plyt) fstack = [0]*(n//4) + [90]*(n//4) + [90]*(n//4) + [0]*(n//4) # clamping spb.w1rx = 0. spb.w2rx = 0. spb.w1ry = 0. spb.w2ry = 0. spb.add_panel(y1=0, y2=spb.b/2.) spb.add_panel(y1=spb.b/2., y2=spb.b) spb.add_bladestiff1d(mu=spb.mu, ys=spb.b/2., bb=0., bf=bf, fstack=fstack, fplyt=plyt, flaminaprop=spb.laminaprop) spb.freq(atype=4, silent=True, reduced_dof=False) assert np.isclose(spb.eigvals[0].real/2/np.pi, value)
def test_freq_Stiffener1D(): print('Testing frequency analysis for StiffPanelBay with a 1D Stiffener') spb = StiffPanelBay() spb.a = 2. spb.b = 0.5 spb.stack = [0, 90, 90, 0] spb.plyt = 1e-3*0.125 spb.laminaprop = (142.5e9, 8.7e9, 0.28, 5.1e9, 5.1e9, 5.1e9) spb.model = 'plate_clt_donnell_bardell' spb.mu = 1.3e3 spb.m = 15 spb.n = 16 spb.add_panel(y1=0, y2=spb.b/2., plyt=spb.plyt) spb.add_panel(y1=spb.b/2., y2=spb.b, plyt=spb.plyt) spb.add_bladestiff1d(ys=spb.b/2., Fx=0., bf=0.08, fstack=[0, 90, 90, 0]*5, fplyt=spb.plyt, flaminaprop=spb.laminaprop) k0 = spb.calc_k0(silent=True) M = spb.calc_kM(silent=True) eigvals, eigvecs = freq(k0, M, silent=True, num_eigvalues=10) assert np.isclose(eigvals[0].real, 79.5906673583, atol=0.1, rtol=0)
spb.b = 1. spb.r = 10. spb.stack = [0, 90, 90, 0, -45, +45] spb.plyt = 1e-3*0.125 spb.laminaprop = (142.5e9, 8.7e9, 0.28, 5.1e9, 5.1e9, 5.1e9) spb.model = 'cpanel_clt_donnell_bardell' spb.mu = 1.3e3 spb.m = 13 spb.n = 14 spb.add_panel(y1=0, y2=spb.b/3., plyt=spb.plyt, Nxx=-100.) spb.add_panel(y1=spb.b/3., y2=2*spb.b/3., plyt=spb.plyt, Nxx=-100.) spb.add_panel(y1=2*spb.b/3., y2=spb.b, plyt=spb.plyt, Nxx=-100.) spb.add_bladestiff1d(ys=spb.b/3., Fx=-100., bf=0.05, fstack=[0, 90, 90, 0]*4, fplyt=spb.plyt, flaminaprop=spb.laminaprop) spb.add_bladestiff1d(ys=2*spb.b/3., Fx=-100., bf=0.05, fstack=[0, 90, 90, 0]*4, fplyt=spb.plyt, flaminaprop=spb.laminaprop) spb.lb(silent=False) print 'Fx', spb.bladestiff1ds[0].Fx print 'ys', spb.bladestiff1ds[0].ys print 'bf', spb.bladestiff1ds[0].bf print 'df', spb.bladestiff1ds[0].df print 'E1', spb.bladestiff1ds[0].E1 print 'F1', spb.bladestiff1ds[0].F1 print 'S1', spb.bladestiff1ds[0].S1 print 'Jxx', spb.bladestiff1ds[0].Jxx