def safe_cross_reference(self, model: BDF, xref_errors):
"""
Cross links the card so referenced cards can be extracted directly
Parameters
----------
model : BDF()
the BDF object
"""
msg = ', which is required by CGAP eid=%s' % self.eid
self.ga_ref = model.Node(self.ga, msg=msg)
self.gb_ref = model.Node(self.gb, msg=msg)
if self.g0:
self.g0_ref = model.Node(self.g0, msg=msg)
self.x = self.g0_ref.get_position()
self.pid_ref = model.safe_property(self.pid,
self.eid,
xref_errors,
msg=msg)
if self.cid is not None:
self.cid_ref = model.safe_coord(self.cid,
self.eid,
xref_errors,
msg=msg)
def getNodes(self, grids, grids_expected, coords, debug=False):
model = BDF(debug=False)
for (nid, grid) in enumerate(grids):
(cid, x, y, z) = grid
model.add_card(['GRID', nid + 1, cid, x, y, z], 'GRID')
gridObj = model.Node(nid + 1)
if debug:
print(gridObj)
for (cid, coord) in enumerate(coords):
#print coord
(rid, x, y, z) = coord
model.add_card(['CORD2R', cid + 1, rid] + x + y + z, 'CORD2R')
coordObj = model.Coord(cid + 1)
if debug:
print(coordObj)
model.cross_reference()
for (i, grid) in enumerate(grids_expected):
(cid, x, y, z) = grid
node = model.Node(i + 1)
pos = node.Position()
n = array([x, y, z])
msg = 'expected=%s actual=%s\n' % (n, pos)
msg += 'n=%s grid=\n%s' % (i + 1, node)
coord = node.cp
msg += 'n=%s coord=\n%s' % (node.nid, coord)
while coord.rid:
msg += 'n=%s rcoord=\n%s' % (node.nid, coord.rid)
coord = coord.rid
assert allclose(n, pos), msg
def test_cord2_rcs_01(self):
"""
all points are located at <30,40,50>
"""
model = BDF(debug=False)
cards = [
[#'$ Femap with NX Nastran Coordinate System 10 : rectangular defined in a rectangular',
'CORD2R* 10 0 10. 5.',
'* 3. 10.3420201433 4.53015368961 3.81379768136* ',
'* 10.7198463104 5.68767171433 3.09449287122',],
[#'$ Femap with NX Nastran Coordinate System 11 : cylindrical defined in rectangular',
'CORD2C* 11 0 7. 3.',
'* 9. 7.64278760969 2.73799736977 9.71984631039* ',
'* 7.75440650673 3.37968226211 8.46454486422',],
[#'$ Femap with NX Nastran Coordinate System 12 : spherical defined in rectangular',
'CORD2S* 12 0 12. 8.',
'* 5. 12.6427876097 7.86697777844 5.75440650673* ',
'* 12.6634139482 8.58906867688 4.53861076379',],
['GRID* 10 10 42.9066011565 34.2422137135',
'* 28.6442730262 0',],
['GRID* 11 11 48.8014631871 78.8394787869',
'* 34.6037164304 0',],
['GRID* 12 12 58.0775343829 44.7276544324',
'* 75.7955331161 0',],
]
for lines in cards:
card = model.process_card(lines)
model.add_card(card, card[0])
model.cross_reference()
for nid in model.nodes:
a = array([30.,40.,50.])
b = model.Node(nid).Position()
self.assertTrue(allclose(array([30.,40.,50.]), model.Node(nid).Position()), str(a-b))
def test_cord2_rcs_03(self):
"""
all points are located at <30,40,50>
"""
model = BDF(debug=False)
cards = [
[
'CORD2S* 2 0 0. 0.',
'* 0. 0. 0. 1.* ',
'* 1. 0. 1.',
],
[
#'$ Femap with NX Nastran Coordinate System 30 : rectangular in spherical',
'CORD2R* 30 2 14. 30.',
'* 70. 13.431863852 32.1458443949 75.2107442927* ',
'* 14.4583462334 33.4569982885 68.2297989286',
],
[
#'$ Femap with NX Nastran Coordinate System 31 : cylindrical in spherical',
'CORD2C* 31 2 3. 42.',
'* -173. 2.86526881213 45.5425615252 159.180363517* ',
'* 3.65222385965 29.2536614627 -178.631312271',
],
[
#'$ Femap with NX Nastran Coordinate System 32 : spherical in spherical',
'CORD2S* 32 2 22. 14.',
'* 85. 22.1243073983 11.9537753718 77.9978191005* ',
'* 21.0997242967 13.1806120497 88.4824763008',
],
[
'GRID* 30 30 40.7437952957 -23.6254877994',
'* -33.09784854 0',
],
[
'GRID* 31 31 62.9378078196 15.9774797923',
'* 31.0484428362 0',
],
[
'GRID* 32 32 53.8270847449 95.8215692632',
'* 159.097767463 0',
],
]
for lines in cards:
card = model._process_card(lines)
model.add_card(card, card[0])
model.cross_reference()
for nid in model.nodes:
a = array([30., 40., 50.])
b = model.Node(nid).Position()
self.assertTrue(
allclose(array([30., 40., 50.]),
model.Node(nid).Position()), str(a - b))
def test_cord2_rcs_02(self):
"""
all points are located at <30,40,50>
"""
model = BDF(debug=False)
cards = [
[
'CORD2C* 1 0 0. 0.',
'* 0. 0. 0. 1.* ',
'* 1. 0. 1.',
],
[
#'$ Femap with NX Nastran Coordinate System 20 : rectangular defined in cylindrical',
'CORD2R* 20 1 7. 20.',
'* -6. 7.07106781187 28.1301023542 -6.* ',
'* 7.70710678119 20. -5.29289321881',
],
[
#'$ Femap with NX Nastran Coordinate System 21 : cylindrical defined in cylindrical',
'CORD2C* 21 1 15. -30.',
'* 12. 14.6565766735 -30.3177805524 12.9355733712* ',
'* 14.6234241583 -26.4257323272 11.9304419665',
],
[
#'$ Femap with NX Nastran Coordinate System 22 : spherical defined in cylindrical',
'CORD2S* 22 1 5. -75.',
'* 20. 5.66032384035 -82.9319986389 19.8502545865* ',
'* 4.88876051026 -73.8006653677 19.0116094889',
],
[
'GRID* 20 20 64.2559135157 -14.9400459772',
'* 27.3271005317 0',
],
[
'GRID* 21 21 52.8328862418 -28.8729017195',
'* 34.615939507 0',
],
[
'GRID* 22 22 61.1042111232 158.773483595',
'* -167.4951724 0',
],
]
for lines in cards:
card = model._process_card(lines)
model.add_card(card, card[0])
model.cross_reference()
for nid in model.nodes:
a = array([30., 40., 50.])
b = model.Node(nid).Position()
self.assertTrue(
allclose(array([30., 40., 50.]),
model.Node(nid).Position()), str(a - b))
def test_cord2r_02(self):
grid = ['GRID 20143 7 -9.31-4 .11841 .028296']
coord = [
'CORD2R 7 1.135 .089237 -.0676 .135 .089237 -.0676',
' 1.135 .089237 .9324'
]
model = BDF(debug=False)
card = model._process_card(grid)
model.add_card(card, card[0])
card = model._process_card(coord)
model.add_card(card, card[0])
model.cross_reference()
coord = model.Coord(7)
#print(coord.origin)
#print(coord.i, coord.j, coord.k)
node = model.Node(20143)
xyzp1 = Position(node.xyz, node.cp, model)
xyzp2 = Position(node.xyz, node.cp_ref, model)
xyz = node.get_position()
assert np.array_equal(xyz, xyzp1)
assert np.array_equal(xyz, xyzp2)
xyz_same = PositionWRT([1., 2., 3.], 100, 100, model)
assert np.array_equal(xyz_same, [1., 2., 3.])
xyz_wrt_p1 = PositionWRT(node.xyz, node.cp, 0, model)
xyz_wrt_p2 = PositionWRT(node.xyz, node.cp_ref, 0, model)
xyz_wrt = node.get_position_wrt(model, 0)
assert np.array_equal(xyz, xyz_wrt_p1)
assert np.array_equal(xyz, xyz_wrt_p2)
assert np.array_equal(xyz, xyz_wrt)
# by running it through Patran...
#GRID 20143 1.1067 .207647 -.068531
expected = array([1.106704, .207647, -0.068531])
diff = xyz - expected
msg = '\nexpected=%s \nactual =%s \ndiff =%s' % (expected, xyz, diff)
assert allclose(diff, 0.), msg
coord = model.Coord(7)
coord.beta_n(1)
coord.beta_n(2)
coord.beta_n(3)
coord.beta_n(6)
with self.assertRaises(AttributeError):
self.assertTrue(array_equal(coord.T(), coord.beta_n(2)))
#with self.assertRaises(NotImplementedError):
#self.assertTrue(array_equal(coord.T(), coord.beta_n(2)))
model2 = BDF(debug=False)
cid = 7
origin = [1.135, .089237, -.0676]
zaxis = [.135, .089237, -.0676]
xzplane = [1.135, .089237, .9324]
coord2 = model2.add_cord2r(cid, origin, zaxis, xzplane, rid=0, comment='cord2r')
coord2.comment = ''
assert coord == coord2, 'coord:\n%r\ncoord2:\n%r' % (str(coord), str(coord2))
def _get_nodes(self, grids, grids_expected, coords):
model = BDF(debug=False)
for grid in grids:
(nid, cid, x, y, z) = grid
model.add_card(['GRID', nid, cid, x, y, z], 'GRID')
for coord in coords:
(cid, rid, x, y, z) = coord
model.add_card(['CORD2R', cid, rid] + x + y + z, 'CORD2R')
coord_obj = model.Coord(cid)
model.cross_reference()
for i, grid in enumerate(grids_expected):
nid, cid, x, y, z = grid
node = model.Node(nid)
pos = node.get_position()
n = array([x, y, z])
msg = 'i=%s expected=%s actual=%s\n' % (i, n, pos)
msg += 'n=%s grid=\n%s' % (nid, node)
coord = node.cp
msg += 'n=%s coord=\n%s' % (node.nid, coord)
while coord.rid:
msg += 'n=%s rcoord=\n%s' % (node.nid, coord.rid)
coord = coord.rid
assert allclose(n, pos), msg
def test_cord2r_1(self):
grid = ['GRID 20143 7 -9.31-4 .11841 .028296']
coord = ['CORD2R 7 1.135 .089237 -.0676 .135 .089237 -.0676',
' 1.135 .089237 .9324']
model = BDF(debug=False)
card = model.process_card(grid)
model.add_card(card, card[0])
card = model.process_card(coord)
model.add_card(card, card[0])
model.cross_reference()
g = model.Node(20143)
#print(g.Position(debug=False))
# by running it through Patran...
#GRID 20143 1.1067 .207647 -.068531
diff = g.Position() - array([1.106704, .207647, -0.068531])
msg = 'diff=%s' % diff
assert allclose(diff, 0.), msg
coord = model.Coord(7)
coord.T()
self.assertTrue(array_equal(coord.T(), coord.beta_n(2)))
def test_cord2r_02(self):
grid = ['GRID 20143 7 -9.31-4 .11841 .028296']
coord = ['CORD2R 7 1.135 .089237 -.0676 .135 .089237 -.0676',
' 1.135 .089237 .9324']
model = BDF(debug=False)
card = model.process_card(grid)
model.add_card(card, card[0])
card = model.process_card(coord)
model.add_card(card, card[0])
model.cross_reference()
coord = model.Coord(7)
#print(coord.origin)
#print(coord.i, coord.j, coord.k)
g = model.Node(20143)
#print(g.Position(debug=False))
xyz = g.Position()
# by running it through Patran...
#GRID 20143 1.1067 .207647 -.068531
expected = array([1.106704, .207647, -0.068531])
diff = xyz - expected
msg = '\nexpected=%s \nactual =%s \ndiff =%s' % (expected, xyz, diff)
assert allclose(diff, 0.), msg
coord = model.Coord(7)
coord.T()
self.assertTrue(array_equal(coord.T(), coord.beta_n(2)))
def cross_reference(self, model: BDF) -> None:
"""
Cross links the card so referenced cards can be extracted directly
Parameters
----------
model : BDF()
the BDF object
"""
msg = ', which is required by CBUSH1D eid=%s' % self.eid
self.ga_ref = model.Node(self.ga, msg=msg)
if self.gb:
self.gb_ref = model.Node(self.gb, msg=msg)
self.pid_ref = model.Property(self.pid, msg=msg)
if self.cid is not None:
self.cid_ref = model.Coord(self.cid)
def cross_reference(self, model: BDF) -> None:
"""
Cross links the card so referenced cards can be extracted directly
Parameters
----------
model : BDF()
the BDF object
"""
msg = ', which is required by CFAST eid=%s' % self.eid
self.pid_ref = model.Property(self.Pid(), msg=msg)
if self.gs:
self.gs_ref = model.Node(self.Gs(), msg=msg)
if self.ga:
self.ga_ref = model.Node(self.Ga(), msg=msg)
if self.gb:
self.gb_ref = model.Node(self.Gb(), msg=msg)
def get_nodes(grids, grids_expected, coords):
"""
Create each input grid/coord
Loop over the expected grids, use the provided coordinate system
and verify that the xyz location is correct.
Parameters
----------
grids : List[grid]
the grids
grid : List[nid, cp, x, y, z]
the GRID fields
coords : List[coord]
coord : List[int cid, rid, origin, zaxis, xaxis]
the coordinate system to add to the model
grids_expected : List[grid]
the expected grids
grid : List[nid, cp, x, y, z]
the GRID fields
"""
model = BDF(debug=False)
for grid in grids:
(nid, cid, x, y, z) = grid
model.add_card(['GRID', nid, cid, x, y, z], 'GRID')
for coord in coords:
(cid, rid, x, y, z) = coord
model.add_card(['CORD2R', cid, rid] + x + y + z, 'CORD2R')
#coord_obj = model.Coord(cid)
model.cross_reference()
save_load_deck(model,
run_remove_unused=False,
run_convert=False,
run_save_load_hdf5=True)
for (i, grid) in enumerate(grids_expected):
(nid, cid, x, y, z) = grid
node = model.Node(nid)
xyz_actual = node.get_position()
xyz = array([x, y, z])
msg = 'i=%s expected=%s actual=%s\n' % (i, xyz, xyz_actual)
msg += 'n=%s grid=\n%s' % (nid, node)
coord_ref = node.cp_ref
msg += 'n=%s coord=\n%s' % (node.nid, coord_ref)
if not allclose(xyz, xyz_actual):
# TODO: this used to work, but the changing xref broke it somehow
# this block probably needs to be slightly updated
while coord_ref.rid:
msg += 'xyz=%s rcoord=\n%s' % (node.nid, coord_ref.rid)
coord_ref = coord_ref.rid
assert allclose(xyz, xyz_actual), msg
def cross_reference(self, model: BDF) -> None:
"""
Cross links the card so referenced cards can be extracted directly
Parameters
----------
model : BDF()
the BDF object
"""
msg = ', which is required by CGAP eid=%s' % self.eid
self.ga_ref = model.Node(self.ga, msg=msg)
self.gb_ref = model.Node(self.gb, msg=msg)
if self.g0:
self.g0_ref = model.Node(self.g0, msg=msg)
self.x = self.g0_ref.get_position()
self.pid_ref = model.Property(self.pid, msg=msg)
if self.cid:
self.cid_ref = model.Coord(self.cid, msg=msg)
def safe_cross_reference(self, model: BDF, xref_errors):
"""
Cross links the card so referenced cards can be extracted directly
Parameters
----------
model : BDF()
the BDF object
"""
msg = ', which is required by CONM1 eid=%s' % self.eid
self.nid_ref = model.Node(self.nid, msg=msg)
self.cid_ref = model.safe_coord(self.cid, self.eid, xref_errors, msg='')
def cross_reference(self, model: BDF) -> None:
"""
Cross links the card so referenced cards can be extracted directly
Parameters
----------
model : BDF()
the BDF object
"""
msg = ', which is required by CONM1 eid=%s' % self.eid
self.nid_ref = model.Node(self.nid, msg=msg)
self.cid_ref = model.Coord(self.cid, msg=msg)
def get_node_positions_no_xref(self, model: BDF, nodes: List[Any]=None) -> np.ndarray:
"""returns the positions of multiple node objects"""
if not nodes:
nodes = self.nodes
nnodes = len(nodes)
positions = np.empty((nnodes, 3), dtype='float64')
positions.fill(np.nan)
for i, nid in enumerate(nodes):
if nid is not None:
node = model.Node(nid)
positions[i, :] = node.get_position_no_xref(model)
return positions
def cross_reference(self, model: BDF) -> None:
"""
Cross links the card so referenced cards can be extracted directly
Parameters
----------
model : BDF()
the BDF object
"""
msg = ', which is required by PLOADX1 lid=%s' % self.sid
self.eid_ref = model.Element(self.eid, msg=msg)
self.ga_ref = model.Node(self.ga, msg=msg)
self.gb_ref = model.Node(self.gb, msg=msg)
def cross_reference(self, model: BDF) -> None:
"""
Cross links the card so referenced cards can be extracted directly
Parameters
----------
model : BDF()
the BDF object
"""
msg = ', which is required by PLOTEL eid=%s' % self.eid
self.nodes_ref = [
model.Node(self.nodes[0], msg=msg),
model.Node(self.nodes[1], msg=msg),
]
def safe_cross_reference(self, model: BDF, xref_errors):
msg = ', which is required by CBEAM eid=%s' % (self.eid)
self.nodes_ref = [
model.Node(self.ga, msg=msg),
model.Node(self.gb, msg=msg),
]
self.nodes_ref = [self.ga_ref, self.gb_ref]
self.pid_ref = model.safe_property(self.pid, self.eid, xref_errors, msg=msg)
if self.g0:
try:
self.g0_ref = model.nodes[self.g0]
ga_ref = self.nodes_ref[0]
self.g0_vector = self.g0_ref.get_position() - ga_ref.get_position()
except KeyError:
model.log.warning('Node=%s%s' % (self.g0, msg))
else:
self.g0_vector = self.x
def cross_reference(self, model: BDF) -> None:
"""
Cross links the card so referenced cards can be extracted directly
Parameters
----------
model : BDF()
the BDF object
"""
msg = ', which is required by CBUSH eid=%s' % self.eid
self.nodes_ref = model.EmptyNodes(self.node_ids, msg=msg)
self.pid_ref = model.Property(self.pid, msg=msg)
if self.g0 is not None:
self.g0_ref = model.Node(self.g0, msg=msg)
if self.cid is not None:
self.cid_ref = model.Coord(self.cid, msg=msg)
if self.ocid is not None and self.ocid != -1:
self.ocid_ref = model.Coord(self.ocid, msg=msg)
def test_cord2r_1(self):
grid = ['GRID 20143 7 -9.31-4 .11841 .028296']
coord = [
'CORD2R 7 1.135 .089237 -.0676 .135 .089237 -.0676',
' 1.135 .089237 .9324'
]
model = BDF()
card = model.process_card(grid)
model.add_card(card, card[0])
card = model.process_card(coord)
model.add_card(card, card[0])
model.cross_reference()
g = model.Node(20143)
#print(g.Position(debug=False))
diff = g.Position() - array([1.106704, .207647, -0.068531])
assert allclose(diff, 0.)
def test_grid_01(self):
model = BDF(debug=False)
cards = [
#['CORD1R', 1, 1, 2, 3], # fails on self.k
['GRID', 1, 0, 0., 0., 0.],
['GRID', 2, 0, 1., 0., 0.],
['GRID', 4, 0, 1., 2., 3.],
]
for card in cards:
model.add_card(card, card[0], comment='comment', is_list=True)
#+------+-----+----+----+----+----+----+----+------+
#| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
#+======+=====+====+====+====+====+====+====+======+
#| GRID | NID | CP | X1 | X2 | X3 | CD | PS | SEID |
#+------+-----+----+----+----+----+----+----+------+
node = model.Node(4)
self.assertEqual(node.get_field(1), 4)
self.assertEqual(node.get_field(2), 0)
self.assertEqual(node.get_field(3), 1.)
self.assertEqual(node.get_field(4), 2.)
self.assertEqual(node.get_field(5), 3.)
node.update_field(1, 5)
node.update_field(2, 6)
node.update_field(3, 7.)
node.update_field(4, 8.)
node.update_field(5, 9.)
with self.assertRaises(KeyError):
node.update_field(9, 'dummy')
self.assertEqual(node.get_field(1), 5)
self.assertEqual(node.get_field(2), 6)
self.assertEqual(node.get_field(3), 7.)
self.assertEqual(node.get_field(4), 8.)
self.assertEqual(node.get_field(5), 9.)
with self.assertRaises(KeyError):
node.get_field(9)
def cross_reference(self, model: BDF) -> None:
"""
Cross links the card so referenced cards can be extracted directly
Parameters
----------
model : BDF()
the BDF object
"""
msg = ', which is required by CBEAM eid=%s' % (self.eid)
self.ga_ref = model.Node(self.ga, msg=msg)
self.gb_ref = model.Node(self.gb, msg=msg)
self.nodes_ref = [self.ga_ref, self.gb_ref]
self.pid_ref = model.Property(self.pid, msg=msg)
if self.g0:
self.g0_ref = model.nodes[self.g0]
self.g0_vector = self.g0_ref.get_position(
) - self.ga_ref.get_position()
else:
self.g0_vector = self.x
if model.is_nx:
assert self.offt == 'GGG', 'NX only support offt=GGG; offt=%r' % self.offt
model_output = BDF()
pid_pbush = 99000000
prop_pbush_k =[1.0e+8,1.0e+8,1.0e+8,1.0e+12,1.0e+12,1.0e+12]
model_output.add_pbush(pid_pbush,prop_pbush_k,'','')
list_len = int(len(list_input_node) / 2 )
count = -1
for ta in range(list_len):
count = count + 1
id_grid_new = int(list_input_node[count])
count = count + 1
id_grid_input = int(list_input_node[count])
grid_input = model_input.Node(id_grid_input)
grid_input_pos = grid_input.get_position()
model_output.add_grid(id_grid_new,grid_input_pos)
list_node_pair = [id_grid_new,id_grid_input]
model_output.add_cbush(id_grid_new,pid_pbush,list_node_pair,'','',0)
model_output.write_bdf('cbush.bdf')
def test_cord2_rcs_03(self):
"""
all points are located at <30,40,50>
"""
model = BDF(debug=False)
cards = [
[
'CORD2S* 2 0 0. 0.',
'* 0. 0. 0. 1.* ',
'* 1. 0. 1.',
],
[
#'$ Coordinate System 30 : rectangular in spherical',
'CORD2R* 30 2 14. 30.',
'* 70. 13.431863852 32.1458443949 75.2107442927* ',
'* 14.4583462334 33.4569982885 68.2297989286',
],
[
#'$ Coordinate System 31 : cylindrical in spherical',
'CORD2C* 31 2 3. 42.',
'* -173. 2.86526881213 45.5425615252 159.180363517* ',
'* 3.65222385965 29.2536614627 -178.631312271',
],
[
#'$ Coordinate System 32 : spherical in spherical',
'CORD2S* 32 2 22. 14.',
'* 85. 22.1243073983 11.9537753718 77.9978191005* ',
'* 21.0997242967 13.1806120497 88.4824763008',
],
[
'GRID* 30 30 40.7437952957 -23.6254877994',
'* -33.09784854 0',
],
[
'GRID* 31 31 62.9378078196 15.9774797923',
'* 31.0484428362 0',
],
[
'GRID* 32 32 53.8270847449 95.8215692632',
'* 159.097767463 0',
],
]
for lines in cards:
card = model.process_card(lines)
model.add_card(card, card[0])
xyz_cid0b = model.get_xyz_in_coord_no_xref(cid=0, fdtype='float64')
xyz_cid0c = model.get_xyz_in_coord_no_xref(cid=32, fdtype='float64')
model.cross_reference()
xyz_cid0_actual = array([
[30., 40., 50.],
[30., 40., 50.],
[30., 40., 50.],
],
dtype='float64')
for nid in model.nodes:
a = array([30., 40., 50.])
b = model.Node(nid).get_position()
self.assertTrue(
allclose(array([30., 40., 50.]),
model.Node(nid).get_position()), str(a - b))
xyz_cid0 = model.get_xyz_in_coord(cid=0, fdtype='float64')
array_equal(xyz_cid0_actual, xyz_cid0)
icd_transform, icp_transform, xyz_cp, nid_cp_cd = model.get_displacement_index_xyz_cp_cd(
)
xyz_cid0_xform = model.transform_xyzcp_to_xyz_cid(xyz_cp,
icp_transform,
cid=0)
array_equal(xyz_cid0_actual, xyz_cid0_xform)
assert array_equal(nid_cp_cd[:, 0], array([30, 31, 32]))
xyz_cid_30 = model.transform_xyzcp_to_xyz_cid(xyz_cp,
icp_transform,
cid=30)
xyz_cid_31 = model.transform_xyzcp_to_xyz_cid(xyz_cp,
icp_transform,
cid=31)
xyz_cid_32 = model.transform_xyzcp_to_xyz_cid(xyz_cp,
icp_transform,
cid=32)
def test_cord2_rcs_02(self):
"""
all points are located at <30,40,50>
"""
model = BDF(debug=False)
cards = [
[
'CORD2C* 1 0 0. 0.',
'* 0. 0. 0. 1.* ',
'* 1. 0. 1.',],
[
#'$ Coordinate System 20 : rectangular defined in cylindrical',
'CORD2R* 20 1 7. 20.',
'* -6. 7.07106781187 28.1301023542 -6.* ',
'* 7.70710678119 20. -5.29289321881',],
[
#'$ Coordinate System 21 : cylindrical defined in cylindrical',
'CORD2C* 21 1 15. -30.',
'* 12. 14.6565766735 -30.3177805524 12.9355733712* ',
'* 14.6234241583 -26.4257323272 11.9304419665',],
[
#'$ Coordinate System 22 : spherical defined in cylindrical',
'CORD2S* 22 1 5. -75.',
'* 20. 5.66032384035 -82.9319986389 19.8502545865* ',
'* 4.88876051026 -73.8006653677 19.0116094889',],
[
'GRID* 20 20 64.2559135157 -14.9400459772',
'* 27.3271005317 0',],
[
'GRID* 21 21 52.8328862418 -28.8729017195',
'* 34.615939507 0',],
[
'GRID* 22 22 61.1042111232 158.773483595',
'* -167.4951724 0',],
]
for lines in cards:
card = model._process_card(lines)
model.add_card(card, card[0])
unused_xyz_cid0b = model.get_xyz_in_coord_no_xref(cid=0, fdtype='float64')
unused_xyz_cid0c = model.get_xyz_in_coord_no_xref(cid=22, fdtype='float64')
model.cross_reference()
xyz_cid0_actual = array([
[30., 40., 50.],
[30., 40., 50.],
[30., 40., 50.],
], dtype='float64')
for nid in model.nodes:
a = array([30., 40., 50.])
b = model.Node(nid).get_position()
self.assertTrue(allclose(array([30., 40., 50.]),
model.Node(nid).get_position()), str(a - b))
xyz_cid0 = model.get_xyz_in_coord(cid=0, fdtype='float64')
array_equal(xyz_cid0_actual, xyz_cid0)
unused_icd_transform, icp_transform, xyz_cp, nid_cp_cd = model.get_displacement_index_xyz_cp_cd()
xyz_cid0_xform = model.transform_xyzcp_to_xyz_cid(
xyz_cp, nid_cp_cd[:, 0], icp_transform, cid=0)
array_equal(xyz_cid0_actual, xyz_cid0_xform)
assert array_equal(nid_cp_cd[:, 0], array([20, 21, 22]))
unused_xyz_cid_20 = model.transform_xyzcp_to_xyz_cid(
xyz_cp, nid_cp_cd[:, 0], icp_transform, cid=20)
unused_xyz_cid_21 = model.transform_xyzcp_to_xyz_cid(
xyz_cp, nid_cp_cd[:, 0], icp_transform, cid=21)
unused_xyz_cid_22 = model.transform_xyzcp_to_xyz_cid(
xyz_cp, nid_cp_cd[:, 0], icp_transform, cid=22)
def test_cord2_rcs_01(self):
"""
all points are located at <30,40,50>
"""
model = BDF(debug=False)
cards = [
[
#'$ Coordinate System 10 : rectangular defined in a rectangular',
'CORD2R* 10 0 10. 5.',
'* 3. 10.3420201433 4.53015368961 3.81379768136* ',
'* 10.7198463104 5.68767171433 3.09449287122',],
[
#'$ Coordinate System 11 : cylindrical defined in rectangular',
'CORD2C* 11 0 7. 3.',
'* 9. 7.64278760969 2.73799736977 9.71984631039* ',
'* 7.75440650673 3.37968226211 8.46454486422',],
[
#'$ Coordinate System 12 : spherical defined in rectangular',
'CORD2S* 12 0 12. 8.',
'* 5. 12.6427876097 7.86697777844 5.75440650673* ',
'* 12.6634139482 8.58906867688 4.53861076379',],
[
'GRID* 10 10 42.9066011565 34.2422137135',
'* 28.6442730262 0',],
[
'GRID* 11 11 48.8014631871 78.8394787869',
'* 34.6037164304 0',],
[
'GRID* 12 12 58.0775343829 44.7276544324',
'* 75.7955331161 0',],
]
for lines in cards:
card = model._process_card(lines)
model.add_card(card, card[0])
unused_xyz_cid0b = model.get_xyz_in_coord_no_xref(cid=0, fdtype='float64')
unused_xyz_cid0c = model.get_xyz_in_coord_no_xref(cid=12, fdtype='float64')
model.cross_reference()
xyz_cid0_actual = array([
[30., 40., 50.],
[30., 40., 50.],
[30., 40., 50.],
], dtype='float64')
for nid in model.nodes:
node = model.Node(nid)
a = array([30., 40., 50.])
b = node.get_position()
self.assertTrue(allclose(array([30., 40., 50.]),
node.get_position()), str(a - b))
xyz_cid0 = model.get_xyz_in_coord(cid=0, fdtype='float64')
array_equal(xyz_cid0_actual, xyz_cid0)
unused_icd_transform, icp_transform, xyz_cp, nid_cp_cd = model.get_displacement_index_xyz_cp_cd()
xyz_cid0_xform = model.transform_xyzcp_to_xyz_cid(
xyz_cp, nid_cp_cd[:, 0], icp_transform, cid=0)
array_equal(xyz_cid0_actual, xyz_cid0_xform)
assert array_equal(nid_cp_cd[:, 0], array([10, 11, 12]))
unused_xyz_cid_10 = model.transform_xyzcp_to_xyz_cid(
xyz_cp, nid_cp_cd[:, 0], icp_transform, cid=10)
unused_xyz_cid_11 = model.transform_xyzcp_to_xyz_cid(
xyz_cp, nid_cp_cd[:, 0], icp_transform, cid=11)
unused_xyz_cid_12 = model.transform_xyzcp_to_xyz_cid(
xyz_cp, nid_cp_cd[:, 0], icp_transform, cid=12)
def sum_forces_moments(model: BDF, p0: np.ndarray, loadcase_id: int,
cid: int=0,
include_grav: bool=False,
xyz_cid0: Optional[Dict[int, NDArray3float]]=None,
) -> Tuple[NDArray3float, NDArray3float]:
"""
Sums applied forces & moments about a reference point p0 for all
load cases.
Considers:
- FORCE, FORCE1, FORCE2
- MOMENT, MOMENT1, MOMENT2
- PLOAD, PLOAD2, PLOAD4
- LOAD
Parameters
----------
model : BDF()
a BDF object
p0 : NUMPY.NDARRAY shape=(3,) or integer (node ID)
the reference point
loadcase_id : int
the LOAD=ID to analyze
cid : int; default=0
the coordinate system for the summation
include_grav : bool; default=False
includes gravity in the summation (not supported)
xyz_cid0 : None / Dict[int] = (3, ) ndarray
the nodes in the global coordinate system
Returns
-------
forces : NUMPY.NDARRAY shape=(3,)
the forces
moments : NUMPY.NDARRAY shape=(3,)
the moments
.. warning:: not full validated
.. todo:: It's super slow for cid != 0. We can speed this up a lot
if we calculate the normal, area, centroid based on
precomputed node locations.
Pressure acts in the normal direction per model/real/loads.bdf and loads.f06
"""
if not isinstance(loadcase_id, integer_types):
raise RuntimeError('loadcase_id must be an integer; loadcase_id=%r' % loadcase_id)
p = _get_load_summation_point(model, p0, cid=0)
loads, scale_factors, unused_is_grav = model.get_reduced_loads(
loadcase_id, skip_scale_factor0=True)
F = array([0., 0., 0.])
M = array([0., 0., 0.])
xyz = get_xyz_cid0_dict(model, xyz_cid0=xyz_cid0)
unsupported_types = set()
for load, scale in zip(loads, scale_factors):
#if load.type not in ['FORCE1']:
#continue
if load.type == 'FORCE':
if load.Cid() != 0:
cp_ref = load.cid_ref
#from pyNastran.bdf.bdf import CORD2R
#cp_ref = CORD2R()
f = load.mag * cp_ref.transform_vector_to_global(load.xyz) * scale
else:
f = load.mag * load.xyz * scale
node = model.Node(load.node_id)
r = xyz[node.nid] - p
m = cross(r, f)
F += f
M += m
elif load.type == 'FORCE1':
f = load.mag * load.xyz * scale
node = model.Node(load.node_id)
r = xyz[node.nid] - p
m = cross(r, f)
F += f
M += m
elif load.type == 'FORCE2':
f = load.mag * load.xyz * scale
node = model.Node(load.node_id)
r = xyz[node.nid] - p
m = cross(r, f)
F += f
M += m
elif load.type == 'MOMENT':
if load.Cid() != 0:
cp = load.cid_ref
#from pyNastran.bdf.bdf import CORD2R
#cp = CORD2R()
m = load.mag * cp.transform_vector_to_global(load.xyz) * scale
else:
m = load.mag * load.xyz * scale
M += m
elif load.type == 'MOMENT1':
m = load.mag * load.xyz * scale
M += m
elif load.type == 'MOMENT2':
m = load.mag * load.xyz * scale
M += m
elif load.type == 'PLOAD':
nodes = load.node_ids
nnodes = len(nodes)
if nnodes == 3:
n1, n2, n3 = xyz[nodes[0]], xyz[nodes[1]], xyz[nodes[2]]
axb = cross(n1 - n2, n1 - n3)
centroid = (n1 + n2 + n3) / 3.
elif nnodes == 4:
n1, n2, n3, n4 = xyz[nodes[0]], xyz[nodes[1]], xyz[nodes[2]], xyz[nodes[3]]
axb = cross(n1 - n3, n2 - n4)
centroid = (n1 + n2 + n3 + n4) / 4.
else:
msg = 'invalid number of nodes on PLOAD card; nodes=%s' % str(nodes)
raise RuntimeError(msg)
area, normal = _get_area_normal(axb, nodes, xyz)
r = centroid - p
f = load.pressure * area * normal * scale
m = cross(r, f)
F += f
M += m
elif load.type == 'PLOAD1':
_pload1_total(model, loadcase_id, load, scale, xyz, F, M, p)
elif load.type == 'PLOAD2':
pressure = load.pressure * scale
for eid in load.element_ids:
elem = model.elements[eid]
if elem.type in ['CTRIA3', 'CQUAD4', 'CSHEAR', 'CQUADR', 'CTRIAR']:
n = elem.Normal()
area = elem.Area()
f = pressure * n * area
r = elem.Centroid() - p
m = cross(r, f)
F += f
M += m
else:
model.log.warning('case=%s etype=%r loadtype=%r not supported' % (
loadcase_id, elem.type, load.type))
elif load.type == 'PLOAD4':
_pload4_total(loadcase_id, load, scale, xyz, F, M, p)
elif load.type == 'GRAV':
if include_grav: # this will be super slow
gravity = load.GravityVector() * scale
for eid, elem in model.elements.items():
centroid = elem.Centroid()
mass = elem.Mass()
r = centroid - p
f = mass * gravity
m = cross(r, f)
F += f
M += m
else:
# we collect them so we only get one print
unsupported_types.add(load.type)
for load_type in unsupported_types:
model.log.warning('case=%s loadtype=%r not supported' % (loadcase_id, load_type))
#forces, moments = sum_forces_moments(self, p0, loadcase_id,
#include_grav=include_grav, xyz_cid0=xyz_cid0)
if cid == 0:
return F, M
cid0 = 0
F2, M2 = transform_load(F, M, cid0, cid, model)
return F2, M2
def test_cord2_rcs_03(self):
"""
all points are located at <30,40,50>
"""
model = BDF(debug=False)
cards = [
[
'CORD2S* 2 0 0. 0.',
'* 0. 0. 0. 1.* ',
'* 1. 0. 1.',],
[
#'$ Coordinate System 30 : rectangular in spherical',
'CORD2R* 30 2 14. 30.',
'* 70. 13.431863852 32.1458443949 75.2107442927* ',
'* 14.4583462334 33.4569982885 68.2297989286',],
[
#'$ Coordinate System 31 : cylindrical in spherical',
'CORD2C* 31 2 3. 42.',
'* -173. 2.86526881213 45.5425615252 159.180363517* ',
'* 3.65222385965 29.2536614627 -178.631312271',],
[
#'$ Coordinate System 32 : spherical in spherical',
'CORD2S* 32 2 22. 14.',
'* 85. 22.1243073983 11.9537753718 77.9978191005* ',
'* 21.0997242967 13.1806120497 88.4824763008',],
[
'GRID* 30 30 40.7437952957 -23.6254877994',
'* -33.09784854 0',],
[
'GRID* 31 31 62.9378078196 15.9774797923',
'* 31.0484428362 0',],
[
'GRID* 32 32 53.8270847449 95.8215692632',
'* 159.097767463 0',],
]
for lines in cards:
card = model._process_card(lines)
model.add_card(card, card[0])
unused_xyz_cid0b = model.get_xyz_in_coord_no_xref(cid=0, fdtype='float64')
unused_xyz_cid0c = model.get_xyz_in_coord_no_xref(cid=32, fdtype='float64')
bdf_file = StringIO()
model.write_bdf(bdf_file, close=False)
bdf_file.seek(0)
#-------------------------------------------------
model.cross_reference()
model2 = BDFv(debug=False)
model2.read_bdf(bdf_file, punch=True, xref=False, save_file_structure=False)
bdf_file.seek(0)
#-------------------------------------------------
xyz_cid0_actual = array([
[30., 40., 50.],
[30., 40., 50.],
[30., 40., 50.],
], dtype='float64')
for nid in model.nodes:
node = model.Node(nid)
a = array([30., 40., 50.])
b = node.get_position()
self.assertTrue(allclose(array([30., 40., 50.]),
node.get_position()), str(a - b))
xyz_cid0 = model.get_xyz_in_coord(cid=0, fdtype='float64')
assert np.allclose(xyz_cid0_actual, xyz_cid0), '%s' % (xyz_cid0_actual - xyz_cid0)
out = model.get_displacement_index_xyz_cp_cd()
unused_icd_transform, icp_transform, xyz_cp, nid_cp_cd = out
nids = nid_cp_cd[:, 0]
xyz_cid0_xform = model.transform_xyzcp_to_xyz_cid(
xyz_cp, nids, icp_transform, cid=0)
array_equal(xyz_cid0_actual, xyz_cid0_xform)
assert array_equal(nids, array([30, 31, 32]))
model2.nodes.nids = nid_cp_cd[:, 0]
for cid in [30, 31, 32]:
unused_xyz_cid_a = model.transform_xyzcp_to_xyz_cid(
xyz_cp, nids, icp_transform, cid=cid)
unused_xyz_cid_b = model2.transform_xyzcp_to_xyz_cid(
xyz_cp, nids, icp_transform, cid=cid, atol=None)
#assert np.allclose(xyz_cid_a, xyz_cid_b), '%s' % np.isclose(xyz_cid_a, xyz_cid_b)
#print(xyz_cid_a)
#print(xyz_cid_b)
#print(xyz_cid_a - xyz_cid_b)
#print('-------------')
#assert array_equal(xyz_cid_a, xyz_cid_b), 'error=%s' % (
#xyz_cid_a - xyz_cid_b)
#---------------------------------------------
xyz_cid0 = model.transform_xyzcp_to_xyz_cid(
xyz_cp, nids, icp_transform,
cid=0, atol=None)
array_equal(xyz_cid0_actual, xyz_cid0)
model.write_bdf(bdf_file, close=False)
model3 = BDF(debug=False)
origin = [14., 30., 70.]
zaxis = [13.431863852, 32.1458443949, 75.2107442927]
xzplane = [14.4583462334, 33.4569982885, 68.2297989286]
cord2r = model3.add_cord2r(30, origin, zaxis, xzplane, rid=2, comment='')
origin = [3., 42., -173.]
zaxis = [2.86526881213, 45.5425615252, 159.180363517]
xzplane = [3.65222385965, 29.2536614627, -178.631312271]
cord2c = model3.add_cord2c(31, origin, zaxis, xzplane, rid=2, comment='')
origin = [22., 14., 85.]
zaxis = [22.1243073983, 11.9537753718, 77.9978191005]
xzplane = [21.0997242967, 13.1806120497, 88.4824763008]
cord2s = model3.add_cord2s(32, origin, zaxis, xzplane, rid=2, comment='')
assert cord2r == model.coords[cord2r.cid], 'cord2r:\n%r\ncord2r[cid]:\n%r' % (str(cord2r), str(model.coords[cord2r.cid]))
assert cord2c == model.coords[cord2c.cid], 'cord2c:\n%r\ncord2c[cid]:\n%r' % (str(cord2c), str(model.coords[cord2c.cid]))
assert cord2s == model.coords[cord2s.cid], 'cord2s:\n%r\ncord2s[cid]:\n%r' % (str(cord2s), str(model.coords[cord2s.cid]))
def sum_forces_moments_elements(model: BDF, p0: int, loadcase_id: int,
eids: List[int], nids: List[int],
cid: int=0,
include_grav: bool=False,
xyz_cid0: Optional[Dict[int, NDArray3float]]=None,
) -> Tuple[NDArray3float, NDArray3float]:
"""
Sum the forces/moments based on a list of nodes and elements.
Parameters
----------
model : BDF()
a BDF object
eids : List[int]
the list of elements to include (e.g. the loads due to a PLOAD4)
nids : List[int]
the list of nodes to include (e.g. the loads due to a FORCE card)
p0 : int; (3,) ndarray
the point to sum moments about
type = int
sum moments about the specified grid point
type = (3, ) ndarray/list (e.g. [10., 20., 30]):
the x, y, z location in the global frame
loadcase_id : int
the LOAD=ID to analyze
include_grav : bool; default=False
includes gravity in the summation (not supported)
xyz_cid0 : None / Dict[int] = (3, ) ndarray
the nodes in the global coordinate system
Returns
-------
forces : NUMPY.NDARRAY shape=(3,)
the forces
moments : NUMPY.NDARRAY shape=(3,)
the moments
Nodal Types : FORCE, FORCE1, FORCE2,
MOMENT, MOMENT1, MOMENT2,
PLOAD
Element Types: PLOAD1, PLOAD2, PLOAD4, GRAV
If you have a CQUAD4 (eid=3) with a PLOAD4 (sid=3) and a FORCE
card (nid=5) acting on it, you can incldue the PLOAD4, but
not the FORCE card by using:
For just pressure:
.. code-block:: python
eids = [3]
nids = []
For just force:
.. code-block:: python
eids = []
nids = [5]
or both:
.. code-block:: python
eids = [3]
nids = [5]
.. note:: If you split the model into sections and sum the loads
on each section, you may not get the same result as
if you summed the loads on the total model. This is
due to the fact that nodal loads on the boundary are
double/triple/etc. counted depending on how many breaks
you have.
.. todo:: not done...
"""
if not isinstance(loadcase_id, integer_types):
raise RuntimeError('loadcase_id must be an integer; loadcase_id=%r' % loadcase_id)
p = _get_load_summation_point(model, p0, cid=0)
if eids is None:
eids = list(model.element_ids)
if nids is None:
nids = list(model.node_ids)
#for (key, load_case) in model.loads.items():
#if key != loadcase_id:
#continue
loads, scale_factors, unused_is_grav = model.get_reduced_loads(
loadcase_id, skip_scale_factor0=True)
F = array([0., 0., 0.])
M = array([0., 0., 0.])
xyz = get_xyz_cid0_dict(model, xyz_cid0)
unsupported_types = set()
shell_elements = {
'CTRIA3', 'CQUAD4', 'CTRIAR', 'CQUADR',
'CTRIA6', 'CQUAD8', 'CQUAD', 'CSHEAR'}
skip_loads = {'QVOL'}
for load, scale in zip(loads, scale_factors):
#if load.type not in ['FORCE1']:
#continue
#print(load.type)
loadtype = load.type
if loadtype == 'FORCE':
if load.node_id not in nids:
continue
if load.Cid() != 0:
cp_ref = load.cid_ref
#from pyNastran.bdf.bdf import CORD2R
#cp = CORD2R()
f = load.mag * cp_ref.transform_vector_to_global(load.xyz) * scale
else:
f = load.mag * load.xyz * scale
node = model.Node(load.node_id)
r = xyz[node.nid] - p
m = cross(r, f)
F += f
M += m
elif load.type == 'FORCE1':
not_found_nid = False
for nid in load.node_ids:
if nid not in nids:
not_found_nid = True
break
if not_found_nid:
continue
f = load.mag * load.xyz * scale
node = model.Node(load.node_id)
r = xyz[node.nid] - p
m = cross(r, f)
F += f
M += m
elif load.type == 'FORCE2':
not_found_nid = False
for nid in load.node_ids:
if nid not in nids:
not_found_nid = True
break
if not_found_nid:
continue
f = load.mag * load.xyz * scale
node = model.Node(load.node_id)
r = xyz[node.nid] - p
m = cross(r, f)
F += f
M += m
elif load.type == 'MOMENT':
not_found_nid = False
for nid in load.node_ids:
if nid not in nids:
not_found_nid = True
break
if not_found_nid:
continue
if load.Cid() != 0:
cp_ref = load.cid_ref
m = cp_ref.transform_vector_to_global(load.xyz)
else:
m = load.xyz
M += load.mag * m * scale
elif load.type == 'MOMENT1':
not_found_nid = False
for nid in load.node_ids:
if nid not in nids:
not_found_nid = True
break
if not_found_nid:
continue
m = load.mag * load.xyz * scale
M += m
elif loadtype == 'MOMENT2':
not_found_nid = False
for nid in load.node_ids:
if nid not in nids:
not_found_nid = True
break
if not_found_nid:
continue
m = load.mag * load.xyz * scale
M += m
elif loadtype == 'PLOAD':
nodes = load.node_ids
nnodes = len(nodes)
nodesi = 0
if nnodes == 3:
n1, n2, n3 = xyz[nodes[0]], xyz[nodes[1]], xyz[nodes[2]]
axb = cross(n1 - n2, n1 - n3)
centroid = (n1 + n2 + n3) / 3.
elif nnodes == 4:
n1, n2, n3, n4 = xyz[nodes[0]], xyz[nodes[1]], xyz[nodes[2]], xyz[nodes[3]]
axb = cross(n1 - n3, n2 - n4)
centroid = (n1 + n2 + n3 + n4) / 4.
if nodes[3] in nids:
nodesi += 1
else:
raise RuntimeError('invalid number of nodes on PLOAD card; '
'nodes=%s' % str(nodes))
if nodes[0] in nids:
nodesi += 1
if nodes[1] in nids:
nodesi += 1
if nodes[2] in nids:
nodesi += 1
area, normal = _get_area_normal(axb, nodes, xyz)
r = centroid - p
f = load.pressure * area * normal * scale
m = cross(r, f)
node_scale = nodesi / float(nnodes)
F += f * node_scale
M += m * node_scale
elif loadtype == 'PLOAD1':
_pload1_elements(model, loadcase_id, load, scale, eids, xyz, F, M, p)
elif loadtype == 'PLOAD2':
pressure = load.pressure * scale
for eid in load.element_ids:
if eid not in eids:
continue
elem = model.elements[eid]
if elem.type in shell_elements:
normal = elem.Normal()
area = elem.Area()
f = pressure * normal * area
r = elem.Centroid() - p
m = cross(r, f)
F += f
M += m
else:
#model.log.warning('case=%s etype=%r loadtype=%r not supported' % (
#loadcase_id, elem.type, loadtype))
raise NotImplementedError('case=%s etype=%r loadtype=%r not supported' % (
loadcase_id, elem.type, loadtype))
elif loadtype == 'PLOAD4':
_pload4_elements(loadcase_id, load, scale, eids, xyz, F, M, p)
elif loadtype == 'GRAV':
if include_grav: # this will be super slow
g = load.GravityVector() * scale
for eid, elem in model.elements.items():
if eid not in eids:
continue
centroid = elem.Centroid()
mass = elem.Mass()
r = centroid - p
f = mass * g
m = cross(r, f)
F += f
M += m
elif loadtype in skip_loads:
continue
else:
# we collect them so we only get one print
unsupported_types.add(loadtype)
for loadtype in unsupported_types:
model.log.warning('case=%s loadtype=%r not supported' % (loadcase_id, loadtype))
#model.log.info("case=%s F=%s M=%s\n" % (loadcase_id, F, M))
if cid == 0:
return F, M
cid0 = 0
F2, M2 = transform_load(F, M, cid0, cid, model)
return F2, M2