def test_dynamic_with_TStiff2D():
print('Testing dynamic analysis with TStiff2D')
spb = StiffPanelBay()
spb.a = 2.
spb.b = 1.
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.m = 12
spb.n = 13
spb.mu = 1.3e3
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)
bb = spb.b / 5.
bf = bb
stiff = spb.add_tstiff2d(ys=spb.b / 2.,
bf=bf,
bb=bb,
fstack=[0, 90, 90, 0] * 2,
fplyt=spb.plyt * 1.,
flaminaprop=spb.laminaprop,
bstack=[0, 90, 90, 0] * 1,
bplyt=spb.plyt * 1.,
blaminaprop=spb.laminaprop,
mb=12,
nb=13,
mf=12,
nf=13)
k0 = spb.calc_k0()
M = spb.calc_kM()
eigvals, eigvecs = freq(k0, M, silent=True)
def test_tstiff2d_lb():
#NOTE reference values taken from
# compmech.panel.assembly.tstiff2d_1stiff_compression
a_b_list = [0.5, 2., 10.]
ref_values = [-152.607275551, -80.15391295315146, -79.39137361313862]
for a_b, ref_value in zip(a_b_list, ref_values):
print('Testing linear buckling')
spb = StiffPanelBay()
spb.b = 1.
spb.a = spb.b * a_b
spb.stack = [0, +45, -45, 90, -45, +45]
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.m = 12
spb.n = 13
Nxx = -10.
spb.add_panel(y1=0, y2=spb.b / 2., plyt=spb.plyt, Nxx=Nxx)
spb.add_panel(y1=spb.b / 2., y2=spb.b, plyt=spb.plyt, Nxx=Nxx)
bb = spb.b / 5.
if False:
stiff = spb.add_tstiff2d(ys=spb.b / 2.,
bf=bb / 2,
bb=bb,
fstack=[0, 90, 90, 0] * 8,
fplyt=spb.plyt * 1.,
flaminaprop=spb.laminaprop,
bstack=[0, 90, 90, 0] * 4,
bplyt=spb.plyt * 1.,
blaminaprop=spb.laminaprop,
mb=13,
nb=12,
mf=13,
nf=12,
Nxxf=Nxx)
spb.calc_k0()
spb.calc_kG0()
eigvals, eigvecs = lb(spb.k0, spb.kG0, silent=True)
calc = eigvals[0] * Nxx
assert np.isclose(calc, ref_value, rtol=0.05)
def test_static_with_TStiff2D():
print('Testing static analysis with TStiff2D')
spb = StiffPanelBay()
spb.a = 2.
spb.b = 1.
spb.stack = [0, +45, -45, 90, -45, +45, 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.m = 12
spb.n = 13
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)
bb = spb.b/5.
bf = bb
stiff = spb.add_tstiff2d(ys=spb.b/2., bf=bf, bb=bb,
fstack=[0, 90, 90, 0]*8,
fplyt=spb.plyt*1., flaminaprop=spb.laminaprop,
bstack=[0, 90, 90, 0]*4,
bplyt=spb.plyt*1., blaminaprop=spb.laminaprop,
mb=14, nb=13, mf=13, nf=12)
stiff.flange.forces.append([spb.a/2., bf, 0., 0., 1000.])
k0 = spb.calc_k0()
fext = spb.calc_fext()
inc, cs = static(spb.k0, fext, silent=True)
wpanelmin = spb.uvw_skin(cs[0])[2].min()
wbasemin = spb.uvw_stiffener(cs[0], 0, region='base')[2].min()
wflangemax = spb.uvw_stiffener(cs[0], 0, region='flange')[2].max()
spb.plot_skin(cs[0], filename='tmp_test_tstiff2d_static_skin.png',
colorbar=True, vec='w', clean=False)
spb.plot_stiffener(cs[0], si=0, region='base',
filename='tmp_test_tstiff2d_static_stiff_base.png', colorbar=True,
vec='w', clean=False)
spb.plot_stiffener(cs[0], si=0, region='flange',
filename='tmp_test_tstiff2d_static_stiff_flange.png', colorbar=True,
clean=False)
def test_tstiff2d_lb():
#NOTE reference values taken from
# compmech.panel.assembly.tstiff2d_1stiff_compression
a_b_list = [0.5, 2., 10.]
ref_values = [-152.607275551, -80.15391295315146, -79.39137361313862]
for a_b, ref_value in zip(a_b_list, ref_values):
print('Testing linear buckling')
spb = StiffPanelBay()
spb.b = 1.
spb.a = spb.b * a_b
spb.stack = [0, +45, -45, 90, -45, +45]
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.m = 12
spb.n = 13
Nxx = -10.
spb.add_panel(y1=0, y2=spb.b/2., plyt=spb.plyt, Nxx=Nxx)
spb.add_panel(y1=spb.b/2., y2=spb.b, plyt=spb.plyt, Nxx=Nxx)
bb = spb.b/5.
if False:
stiff = spb.add_tstiff2d(ys=spb.b/2., bf=bb/2, bb=bb,
fstack=[0, 90, 90, 0]*8,
fplyt=spb.plyt*1., flaminaprop=spb.laminaprop,
bstack=[0, 90, 90, 0]*4,
bplyt=spb.plyt*1., blaminaprop=spb.laminaprop,
mb=13, nb=12, mf=13, nf=12, Nxxf=Nxx)
spb.calc_k0()
spb.calc_kG0()
eigvals, eigvecs = lb(spb.k0, spb.kG0, silent=True)
calc = eigvals[0]*Nxx
assert np.isclose(calc, ref_value, rtol=0.05)