def test_material_functions(self):
from sfepy.fem import Material
problem = self.problem
conf = problem.conf
ts = problem.get_default_ts(step=0)
conf_mat1 = conf.get_item_by_name('materials', 'mf1')
mat1 = Material.from_conf(conf_mat1, problem.functions)
mat1.time_update(ts, None, mode='normal', problem=problem)
coors = problem.domain.get_mesh_coors()
assert_(nm.all(coors[:, 0] == mat1.get_data(None, None, 'x_0')))
conf_mat2 = conf.get_item_by_name('materials', 'mf2')
mat2 = Material.from_conf(conf_mat2, problem.functions)
mat2.time_update(ts, None, mode='normal', problem=problem)
assert_(nm.all(coors[:, 1] == mat2.get_data(None, None, 'x_1')))
materials = problem.get_materials()
materials.time_update(ts,
problem.equations,
mode='normal',
problem=problem)
mat3 = materials['mf3']
key = mat3.get_keys(region_name='Omega')[0]
assert_(nm.all(mat3.get_data(key, 0, 'a') == 10.0))
assert_(nm.all(mat3.get_data(key, 0, 'b') == 2.0))
assert_(mat3.get_data(None, None, 'c') == 'ahoj')
return True
def test_material_functions(self):
from sfepy.fem import Material
problem = self.problem
conf = problem.conf
ts = problem.get_default_ts(step=0)
conf_mat1 = conf.get_item_by_name('materials', 'mf1')
mat1 = Material.from_conf(conf_mat1, problem.functions)
mat1.time_update(ts, None, mode='normal', problem=problem)
coors = problem.domain.get_mesh_coors()
assert_(nm.all(coors[:,0] == mat1.get_data(None, None, 'x_0')))
conf_mat2 = conf.get_item_by_name('materials', 'mf2')
mat2 = Material.from_conf(conf_mat2, problem.functions)
mat2.time_update(ts, None, mode='normal', problem=problem)
assert_(nm.all(coors[:,1] == mat2.get_data(None, None, 'x_1')))
materials = problem.get_materials()
materials.time_update(ts, problem.equations, mode='normal',
problem=problem)
mat3 = materials['mf3']
key = mat3.get_keys(region_name='Omega')[0]
assert_(nm.all(mat3.get_data(key, 0, 'a') == 10.0))
assert_(nm.all(mat3.get_data(key, 0, 'b') == 2.0))
assert_(mat3.get_data(None, None, 'c') == 'ahoj')
return True
def test_solving(self):
from sfepy.base.base import IndexedStruct
from sfepy.fem \
import FieldVariable, Material, ProblemDefinition, \
Function, Equation, Equations, Integral
from sfepy.fem.conditions import Conditions, EssentialBC
from sfepy.terms import Term
from sfepy.solvers.ls import ScipyDirect
from sfepy.solvers.nls import Newton
u = FieldVariable('u', 'unknown', self.field, self.dim)
v = FieldVariable('v', 'test', self.field, self.dim,
primary_var_name='u')
m = Material('m', lam=1.0, mu=1.0)
f = Material('f', val=[[0.02], [0.01]])
bc_fun = Function('fix_u_fun', fix_u_fun,
extra_args={'extra_arg' : 'hello'})
fix_u = EssentialBC('fix_u', self.gamma1, {'u.all' : bc_fun})
shift_u = EssentialBC('shift_u', self.gamma2, {'u.0' : 0.1})
integral = Integral('i', order=3)
t1 = Term.new('dw_lin_elastic_iso(m.lam, m.mu, v, u)',
integral, self.omega, m=m, v=v, u=u)
t2 = Term.new('dw_volume_lvf(f.val, v)', integral, self.omega, f=f, v=v)
eq = Equation('balance', t1 + t2)
eqs = Equations([eq])
ls = ScipyDirect({})
nls_status = IndexedStruct()
nls = Newton({}, lin_solver=ls, status=nls_status)
pb = ProblemDefinition('elasticity', equations=eqs, nls=nls, ls=ls)
## pb.save_regions_as_groups('regions')
pb.time_update(ebcs=Conditions([fix_u, shift_u]))
state = pb.solve()
name = op.join(self.options.out_dir, 'test_high_level_solving.vtk')
pb.save_state(name, state)
ok = nls_status.condition == 0
if not ok:
self.report('solver did not converge!')
_ok = state.has_ebc()
if not _ok:
self.report('EBCs violated!')
ok = ok and _ok
return ok
def test_boundary_fluxes( self ):
import os.path as op
from sfepy.linalg import rotation_matrix2d
from sfepy.fem.evaluate import BasicEvaluator
from sfepy.fem import Material
problem = self.problem
angles = [0, 30, 45]
region_names = ['Left', 'Right', 'Gamma']
values = [5.0, -5.0, 0.0]
variables = problem.get_variables()
get_state = variables.get_state_part_view
state = self.state.copy(deep=True)
problem.time_update(ebcs={}, epbcs={})
# problem.save_ebc( 'aux.vtk' )
state.apply_ebc()
ev = BasicEvaluator( problem )
aux = ev.eval_residual(state())
field = variables['t'].field
conf_m = problem.conf.get_item_by_name('materials', 'm')
m = Material.from_conf(conf_m, problem.functions)
name = op.join( self.options.out_dir,
op.split( problem.domain.mesh.name )[1] + '_%02d.mesh' )
orig_coors = problem.get_mesh_coors().copy()
ok = True
for ia, angle in enumerate( angles ):
self.report( '%d: mesh rotation %d degrees' % (ia, angle) )
problem.domain.mesh.transform_coors( rotation_matrix2d( angle ),
ref_coors = orig_coors )
problem.set_mesh_coors(problem.domain.mesh.coors,
update_fields=True)
problem.domain.mesh.write( name % angle, io = 'auto' )
for ii, region_name in enumerate( region_names ):
flux_term = 'd_surface_flux.i2.%s( m.K, t )' % region_name
val1 = problem.evaluate(flux_term, t=variables['t'], m=m)
rvec = get_state( aux, 't', True )
reg = problem.domain.regions[region_name]
nods = field.get_dofs_in_region(reg, merge=True)
val2 = rvec[nods].sum() # Assume 1 dof per node.
ok = ok and ((abs( val1 - values[ii] ) < 1e-10) and
(abs( val2 - values[ii] ) < 1e-10))
self.report( ' %d. %s: %e == %e == %e'\
% (ii, region_name, val1, val2, values[ii]) )
# Restore original coordinates.
problem.domain.mesh.transform_coors(rotation_matrix2d(0),
ref_coors=orig_coors)
problem.set_mesh_coors(problem.domain.mesh.coors,
update_fields=True)
return ok
def test_boundary_fluxes(self):
import os.path as op
from sfepy.linalg import rotation_matrix2d
from sfepy.fem.evaluate import BasicEvaluator
from sfepy.fem import Material
problem = self.problem
angles = [0, 30, 45]
region_names = ['Left', 'Right', 'Gamma']
values = [5.0, -5.0, 0.0]
variables = problem.get_variables()
get_state = variables.get_state_part_view
state = self.state.copy(deep=True)
problem.time_update(ebcs={}, epbcs={})
# problem.save_ebc( 'aux.vtk' )
state.apply_ebc()
ev = BasicEvaluator(problem)
aux = ev.eval_residual(state())
field = variables['t'].field
conf_m = problem.conf.get_item_by_name('materials', 'm')
m = Material.from_conf(conf_m, problem.functions)
name = op.join(self.options.out_dir,
op.split(problem.domain.mesh.name)[1] + '_%02d.mesh')
orig_coors = problem.get_mesh_coors().copy()
ok = True
for ia, angle in enumerate(angles):
self.report('%d: mesh rotation %d degrees' % (ia, angle))
problem.domain.mesh.transform_coors(rotation_matrix2d(angle),
ref_coors=orig_coors)
problem.set_mesh_coors(problem.domain.mesh.coors,
update_fields=True)
problem.domain.mesh.write(name % angle, io='auto')
for ii, region_name in enumerate(region_names):
flux_term = 'd_surface_flux.i2.%s( m.K, t )' % region_name
val1 = problem.evaluate(flux_term, t=variables['t'], m=m)
rvec = get_state(aux, 't', True)
reg = problem.domain.regions[region_name]
nods = field.get_dofs_in_region(reg, merge=True)
val2 = rvec[nods].sum() # Assume 1 dof per node.
ok = ok and ((abs(val1 - values[ii]) < 1e-10) and
(abs(val2 - values[ii]) < 1e-10))
self.report( ' %d. %s: %e == %e == %e'\
% (ii, region_name, val1, val2, values[ii]) )
# Restore original coordinates.
problem.domain.mesh.transform_coors(rotation_matrix2d(0),
ref_coors=orig_coors)
problem.set_mesh_coors(problem.domain.mesh.coors, update_fields=True)
return ok
def make_h1_projection_data(target, eval_data):
"""
Project scalar data given by a material-like `eval_data()` function to a
scalar `target` field variable using the :math:`H^1` dot product.
"""
order = target.field.approx_order * 2
integral = Integral('i', order=order)
un = target.name
v = FieldVariable('v', 'test', target.field, 1, primary_var_name=un)
lhs1 = Term.new('dw_volume_dot(v, %s)' % un,
integral,
target.field.region,
v=v,
**{un: target})
lhs2 = Term.new('dw_laplace(v, %s)' % un,
integral,
target.field.region,
v=v,
**{un: target})
def _eval_data(ts, coors, mode, **kwargs):
if mode == 'qp':
val = eval_data(ts, coors, mode, 'val', **kwargs)
gval = eval_data(ts, coors, mode, 'grad', **kwargs)
return {'val': val, 'gval': gval}
m = Material('m', function=_eval_data)
rhs1 = Term.new('dw_volume_lvf(m.val, v)',
integral,
target.field.region,
m=m,
v=v)
rhs2 = Term.new('dw_diffusion_r(m.gval, v)',
integral,
target.field.region,
m=m,
v=v)
eq = Equation('projection', lhs1 + lhs2 - rhs1 - rhs2)
eqs = Equations([eq])
ls = ScipyDirect({})
nls_status = IndexedStruct()
nls = Newton({}, lin_solver=ls, status=nls_status)
pb = ProblemDefinition('aux', equations=eqs, nls=nls, ls=ls)
pb.time_update()
# This sets the target variable with the projection solution.
pb.solve()
if nls_status.condition != 0:
output('H1 projection: solver did not converge!')
def test_boundary_fluxes(self):
from sfepy.fem.evaluate import BasicEvaluator
from sfepy.fem import Material
problem = self.problem
region_names = ['Gamma']
variables = problem.get_variables()
get_state = variables.get_state_part_view
state = self.state.copy(deep=True)
problem.time_update(ebcs={}, epbcs={})
## problem.save_ebc( 'aux.vtk' )
state.apply_ebc()
ev = BasicEvaluator(problem)
aux = ev.eval_residual(state())
field = variables['t'].field
conf_m = problem.conf.get_item_by_name('materials', 'm')
m = Material.from_conf(conf_m, problem.functions)
ok = True
for ii, region_name in enumerate(region_names):
flux_term = 'd_surface_flux.1.%s( m.K, t )' % region_name
val1 = problem.evaluate(flux_term, t=variables['t'], m=m)
rvec = get_state(aux, 't', True)
reg = problem.domain.regions[region_name]
nods = field.get_dofs_in_region(reg, merge=True)
val2 = rvec[nods].sum() # Assume 1 dof per node.
eps = 1e-2
ok = ok and ((abs(val1 - val2) < eps))
self.report( '%d. %s: |%e - %e| = %e < %.2e'\
% (ii, region_name, val1, val2, abs( val1 - val2 ),
eps) )
return ok
def test_boundary_fluxes( self ):
from sfepy.fem.evaluate import BasicEvaluator
from sfepy.fem import Material
problem = self.problem
region_names = ['Gamma']
variables = problem.get_variables()
get_state = variables.get_state_part_view
state = self.state.copy(deep=True)
problem.time_update(ebcs={}, epbcs={})
## problem.save_ebc( 'aux.vtk' )
state.apply_ebc()
ev = BasicEvaluator( problem )
aux = ev.eval_residual(state())
field = variables['t'].field
conf_m = problem.conf.get_item_by_name('materials', 'm')
m = Material.from_conf(conf_m, problem.functions)
ok = True
for ii, region_name in enumerate( region_names ):
flux_term = 'd_surface_flux.1.%s( m.K, t )' % region_name
val1 = problem.evaluate(flux_term, t=variables['t'], m=m)
rvec = get_state( aux, 't', True )
reg = problem.domain.regions[region_name]
nods = field.get_dofs_in_region(reg, merge=True)
val2 = rvec[nods].sum() # Assume 1 dof per node.
eps = 1e-2
ok = ok and ((abs( val1 - val2 ) < eps))
self.report( '%d. %s: |%e - %e| = %e < %.2e'\
% (ii, region_name, val1, val2, abs( val1 - val2 ),
eps) )
return ok
def make_term_args(arg_shapes, arg_kinds, arg_types, ats_mode, domain):
from sfepy.base.base import basestr
from sfepy.fem import Field, FieldVariable, Material, Variables, Materials
from sfepy.mechanics.tensors import dim2sym
omega = domain.regions['Omega']
dim = domain.shape.dim
sym = dim2sym(dim)
def _parse_scalar_shape(sh):
if isinstance(sh, basestr):
if sh == 'D':
return dim
elif sh == 'S':
return sym
elif sh == 'N': # General number ;)
return 5
else:
return int(sh)
else:
return sh
def _parse_tuple_shape(sh):
if isinstance(sh, basestr):
return [_parse_scalar_shape(ii.strip()) for ii in sh.split(',')]
else:
return (int(sh), )
args = {}
str_args = []
materials = []
variables = []
for ii, arg_kind in enumerate(arg_kinds):
if ats_mode is not None:
extended_ats = arg_types[ii] + ('/%s' % ats_mode)
else:
extended_ats = arg_types[ii]
try:
sh = arg_shapes[arg_types[ii]]
except KeyError:
sh = arg_shapes[extended_ats]
if arg_kind.endswith('variable'):
shape = _parse_scalar_shape(sh[0] if isinstance(sh, tuple) else sh)
field = Field.from_args('f%d' % ii,
nm.float64,
shape,
omega,
approx_order=1)
if arg_kind == 'virtual_variable':
if sh[1] is not None:
istate = arg_types.index(sh[1])
else:
# Only virtual variable in arguments.
istate = -1
# -> Make fake variable.
var = FieldVariable('u-1', 'unknown', field, shape)
var.set_constant(0.0)
variables.append(var)
var = FieldVariable('v',
'test',
field,
shape,
primary_var_name='u%d' % istate)
elif arg_kind == 'state_variable':
var = FieldVariable('u%d' % ii, 'unknown', field, shape)
var.set_constant(0.0)
elif arg_kind == 'parameter_variable':
var = FieldVariable('p%d' % ii,
'parameter',
field,
shape,
primary_var_name='(set-to-None)')
var.set_constant(0.0)
variables.append(var)
str_args.append(var.name)
args[var.name] = var
elif arg_kind.endswith('material'):
if sh is None: # Switched-off opt_material.
continue
prefix = ''
if isinstance(sh, basestr):
aux = sh.split(':')
if len(aux) == 2:
prefix, sh = aux
shape = _parse_tuple_shape(sh)
if (len(shape) > 1) or (shape[0] > 1):
# Array.
values = {
'%sc%d' % (prefix, ii): nm.ones(shape, dtype=nm.float64)
}
elif (len(shape) == 1) and (shape[0] == 1):
# Single scalar as a special value.
values = {'.c%d' % ii: 1.0}
else:
raise ValueError('wrong material shape! (%s)' % shape)
mat = Material('m%d' % ii, values=values)
materials.append(mat)
str_args.append(mat.name + '.' + 'c%d' % ii)
args[mat.name] = mat
else:
str_args.append('user%d' % ii)
args[str_args[-1]] = None
materials = Materials(materials)
variables = Variables(variables)
return args, str_args, materials, variables
def main():
from sfepy import data_dir
parser = OptionParser(usage=usage, version='%prog')
parser.add_option('-s',
'--show',
action="store_true",
dest='show',
default=False,
help=help['show'])
options, args = parser.parse_args()
mesh = Mesh.from_file(data_dir + '/meshes/2d/rectangle_tri.mesh')
domain = Domain('domain', mesh)
min_x, max_x = domain.get_mesh_bounding_box()[:, 0]
eps = 1e-8 * (max_x - min_x)
omega = domain.create_region('Omega', 'all')
gamma1 = domain.create_region('Gamma1',
'nodes in x < %.10f' % (min_x + eps))
gamma2 = domain.create_region('Gamma2',
'nodes in x > %.10f' % (max_x - eps))
field = H1NodalVolumeField('fu',
nm.float64,
'vector',
omega,
approx_order=2)
u = FieldVariable('u', 'unknown', field, mesh.dim)
v = FieldVariable('v', 'test', field, mesh.dim, primary_var_name='u')
m = Material('m', lam=1.0, mu=1.0)
f = Material('f', val=[[0.02], [0.01]])
integral = Integral('i', order=3)
t1 = Term.new('dw_lin_elastic_iso(m.lam, m.mu, v, u)',
integral,
omega,
m=m,
v=v,
u=u)
t2 = Term.new('dw_volume_lvf(f.val, v)', integral, omega, f=f, v=v)
eq = Equation('balance', t1 + t2)
eqs = Equations([eq])
fix_u = EssentialBC('fix_u', gamma1, {'u.all': 0.0})
bc_fun = Function('shift_u_fun', shift_u_fun, extra_args={'shift': 0.01})
shift_u = EssentialBC('shift_u', gamma2, {'u.0': bc_fun})
ls = ScipyDirect({})
nls_status = IndexedStruct()
nls = Newton({}, lin_solver=ls, status=nls_status)
pb = ProblemDefinition('elasticity', equations=eqs, nls=nls, ls=ls)
pb.save_regions_as_groups('regions')
pb.time_update(ebcs=Conditions([fix_u, shift_u]))
vec = pb.solve()
print nls_status
pb.save_state('linear_elasticity.vtk', vec)
if options.show:
view = Viewer('linear_elasticity.vtk')
view(vector_mode='warp_norm',
rel_scaling=2,
is_scalar_bar=True,
is_wireframe=True)
def main():
parser = OptionParser(usage=usage, version='%prog')
parser.add_option('-b',
'--basis',
metavar='name',
action='store',
dest='basis',
default='lagrange',
help=help['basis'])
parser.add_option('-n',
'--max-order',
metavar='order',
type=int,
action='store',
dest='max_order',
default=10,
help=help['max_order'])
parser.add_option('-m',
'--matrix',
metavar='type',
action='store',
dest='matrix_type',
default='laplace',
help=help['matrix_type'])
parser.add_option('-g',
'--geometry',
metavar='name',
action='store',
dest='geometry',
default='2_4',
help=help['geometry'])
options, args = parser.parse_args()
dim, n_ep = int(options.geometry[0]), int(options.geometry[2])
output('reference element geometry:')
output(' dimension: %d, vertices: %d' % (dim, n_ep))
n_c = {'laplace': 1, 'elasticity': dim}[options.matrix_type]
output('matrix type:', options.matrix_type)
output('number of variable components:', n_c)
output('polynomial space:', options.basis)
output('max. order:', options.max_order)
mesh = Mesh.from_file(data_dir +
'/meshes/elements/%s_1.mesh' % options.geometry)
domain = Domain('domain', mesh)
omega = domain.create_region('Omega', 'all')
orders = nm.arange(1, options.max_order + 1, dtype=nm.int)
conds = []
order_fix = 0 if options.geometry in ['2_4', '3_8'] else 1
for order in orders:
output('order:', order, '...')
field = Field.from_args('fu',
nm.float64,
n_c,
omega,
approx_order=order,
space='H1',
poly_space_base=options.basis)
to = field.approx_order
quad_order = 2 * (max(to - order_fix, 0))
output('quadrature order:', quad_order)
integral = Integral('i', order=quad_order)
qp, _ = integral.get_qp(options.geometry)
output('number of quadrature points:', qp.shape[0])
u = FieldVariable('u', 'unknown', field, n_c)
v = FieldVariable('v', 'test', field, n_c, primary_var_name='u')
m = Material('m', lam=1.0, mu=1.0)
if options.matrix_type == 'laplace':
term = Term.new('dw_laplace(m.mu, v, u)',
integral,
omega,
m=m,
v=v,
u=u)
n_zero = 1
else:
assert_(options.matrix_type == 'elasticity')
term = Term.new('dw_lin_elastic_iso(m.lam, m.mu, v, u)',
integral,
omega,
m=m,
v=v,
u=u)
n_zero = (dim + 1) * dim / 2
term.setup()
output('assembling...')
tt = time.clock()
mtx, iels = term.evaluate(mode='weak', diff_var='u')
output('...done in %.2f s' % (time.clock() - tt))
mtx = mtx[0][0, 0]
try:
assert_(nm.max(nm.abs(mtx - mtx.T)) < 1e-10)
except:
from sfepy.base.base import debug
debug()
output('matrix shape:', mtx.shape)
eigs = eig(mtx, method='eig.sgscipy', eigenvectors=False)
eigs.sort()
# Zero 'true' zeros.
eigs[:n_zero] = 0.0
ii = nm.where(eigs < 0.0)[0]
if len(ii):
output('matrix is not positive semi-definite!')
ii = nm.where(eigs[n_zero:] < 1e-12)[0]
if len(ii):
output('matrix has more than %d zero eigenvalues!' % n_zero)
output('smallest eigs:\n', eigs[:10])
ii = nm.where(eigs > 0.0)[0]
emin, emax = eigs[ii[[0, -1]]]
output('min:', emin, 'max:', emax)
cond = emax / emin
conds.append(cond)
output('condition number:', cond)
output('...done')
plt.figure(1)
plt.semilogy(orders, conds)
plt.xticks(orders, orders)
plt.xlabel('polynomial order')
plt.ylabel('condition number')
plt.grid()
plt.figure(2)
plt.loglog(orders, conds)
plt.xticks(orders, orders)
plt.xlabel('polynomial order')
plt.ylabel('condition number')
plt.grid()
plt.show()