def test_elements_odd_length():
tim0 = ST_ShaftElement(
L=[1, 1.1],
idl=0,
odl=[0.1, 0.2],
material=steel,
is_random=["L", "odl"],
)
shaft_elm = [tim0, tim0]
disk0 = ST_DiskElement(n=0, m=[20, 30, 40], Id=1, Ip=1, is_random=["m"])
disk1 = ST_DiskElement(n=2, m=[20, 30, 40], Id=1, Ip=1, is_random=["m"])
disks = [disk0, disk1]
brg0 = ST_BearingElement(
n=0,
kxx=[1e6, 2e6],
cxx=[1e3, 2e3],
is_random=["kxx", "cxx"],
)
brg1 = ST_BearingElement(
n=2,
kxx=[1e6, 2e6],
cxx=[1e3, 2e3],
is_random=["kxx", "cxx"],
)
bearings = [brg0, brg1]
with pytest.raises(ValueError) as ex:
ST_Rotor(shaft_elm, disks, bearings)
assert "not all the random elements lists have the same length." in str(
ex.value)
def test_st_disk_elements_odd_length():
tim0 = ShaftElement(L=0.25, idl=0, odl=0.05, material=steel)
tim1 = ShaftElement(L=0.25, idl=0, odl=0.05, material=steel)
shaft_elm = [tim0, tim1]
disk0 = ST_DiskElement(n=0, m=[20, 30], Id=1, Ip=1, is_random=["m"])
disk1 = ST_DiskElement(n=2, m=[20, 30, 40], Id=1, Ip=1, is_random=["m"])
with pytest.raises(ValueError) as ex:
ST_Rotor(shaft_elm, [disk0, disk1])
assert "not all random disk elements lists have same length." in str(
ex.value)
def rand_disk_from_inertia():
elm = ST_DiskElement(n=1,
m=[30, 40],
Id=[0.2, 0.3],
Ip=[0.5, 0.7],
is_random=["m", "Id", "Ip"])
return elm
def rand_disk_from_geometry():
E = [209e9, 211e9]
st_steel = ST_Material(name="Steel", rho=7810, E=E, G_s=81.2e9)
elm = ST_DiskElement.from_geometry(
n=1,
material=st_steel,
width=[0.07, 0.08],
i_d=[0.05, 0.06],
o_d=[0.30, 0.40],
is_random=["material", "width", "i_d", "o_d"],
)
return elm