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HelmholtzRBLagrangeApproximant.py
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Created
Mon, Oct 28, 16:04
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4 KB
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text/x-python
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Wed, Oct 30, 16:04 (2 d)
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blob
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Handle
21996664
Attached To
R6746 RationalROMPy
HelmholtzRBLagrangeApproximant.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from
__future__
import
print_function
import
numpy
as
np
from
context
import
FenicsHelmholtzEngine
as
HFEngine
from
context
import
FenicsHelmholtzScatteringEngine
as
HFSEngine
from
context
import
FenicsHelmholtzScatteringAugmentedEngine
as
HFSAEngine
from
context
import
FenicsHSEngine
as
HSEngine
from
context
import
FenicsHSAugmentedEngine
as
HSAEngine
from
context
import
ROMApproximantLagrangeRB
as
RB
PI
=
np
.
pi
testNo
=
4
if
testNo
==
1
:
params
=
{
'S'
:
5
,
'nodesType'
:
'CHEBYSHEV'
,
'POD'
:
True
}
z0s
=
[
10
+
.
5j
,
14
+
.
5j
]
z0
=
np
.
mean
(
z0s
)
ztar
=
11
from
FEniCS_snippets
import
SquareHomogeneousBubble
boundary
,
mesh
,
forcingTerm
=
SquareHomogeneousBubble
(
kappa
=
12
**
.
5
,
theta
=
np
.
pi
/
3
,
n
=
40
)
solver
=
HFEngine
(
mesh
=
mesh
,
wavenumber
=
z0
**.
5
,
forcingTerm
=
forcingTerm
,
FEDegree
=
3
,
DirichletBoundary
=
boundary
,
DirichletDatum
=
0
)
plotter
=
HSEngine
(
solver
.
V
)
approx
=
RB
(
solver
,
plotter
,
ks
=
z0s
,
w
=
np
.
real
(
z0
**.
5
),
approxParameters
=
params
)
approx
.
plotApp
(
ztar
,
name
=
'u_RB'
)
approx
.
plotHF
(
ztar
,
name
=
'u_HF'
)
approx
.
plotErr
(
ztar
,
name
=
'err'
)
appErr
,
solNorm
=
approx
.
approxError
(
ztar
),
approx
.
HFNorm
(
ztar
)
print
((
'SolNorm:
\t
{}
\n
Err:
\t
{}
\n
ErrRel:
\t
{}'
)
.
format
(
solNorm
,
appErr
,
np
.
divide
(
appErr
,
solNorm
)))
print
(
'
\n
Poles Pade'':'
)
print
(
approx
.
getPoles
(
True
))
############
elif
testNo
==
2
:
params
=
{
'S'
:
10
,
'nodesType'
:
'CHEBYSHEV'
,
'POD'
:
True
}
z0s
=
np
.
power
([
3.85
+
.
15j
,
4.15
+
.
15j
],
2.
)
z0
=
np
.
mean
(
z0s
)
ztar
=
4
**
2.
from
FEniCS_snippets
import
SquareTransmissionDirichlet
boundary
,
mesh
,
n
,
u0
=
SquareTransmissionDirichlet
(
nT
=
2
,
nB
=
1
,
theta
=
np
.
pi
*
45
/
180
,
kappa
=
4.
,
n
=
50
)
solver
=
HFEngine
(
mesh
=
mesh
,
wavenumber
=
z0
**.
5
,
refractionIndex
=
n
,
FEDegree
=
3
,
DirichletBoundary
=
boundary
,
DirichletDatum
=
u0
)
plotter
=
HSEngine
(
solver
.
V
)
approx
=
RB
(
solver
,
plotter
,
ks
=
z0s
,
w
=
np
.
real
(
z0
**.
5
),
approxParameters
=
params
,
plotSnap
=
'ALL'
)
approx
.
plotApp
(
ztar
,
name
=
'u_Pade'''
)
approx
.
plotHF
(
ztar
,
name
=
'u_HF'
)
approx
.
plotErr
(
ztar
,
name
=
'err'
)
appErr
,
solNorm
=
approx
.
approxError
(
ztar
),
approx
.
HFNorm
(
ztar
)
print
((
'SolNorm:
\t
{}
\n
Err:
\t
{}
\n
ErrRel:
\t
{}'
)
.
format
(
solNorm
,
appErr
,
np
.
divide
(
appErr
,
solNorm
)))
print
(
'
\n
Poles Pade'':'
)
print
(
approx
.
getPoles
(
True
))
############
elif
testNo
in
[
3
,
4
]:
params
=
{
'S'
:
30
,
'nodesType'
:
'CHEBYSHEV'
,
'POD'
:
True
}
k0s
=
[
0
,
8
]
k0
=
np
.
mean
(
k0s
)
ktar
=
4.5
from
FEniCS_snippets
import
SquareScatteringTB
bdrD
,
bdrN
,
mesh
,
forcingTerm
=
SquareScatteringTB
(
kappa
=
4
,
theta
=
np
.
pi
/
2
,
n
=
40
)
if
testNo
==
3
:
solver
=
HFSEngine
(
mesh
=
mesh
,
wavenumber
=
k0
,
FEDegree
=
3
,
forcingTerm
=
forcingTerm
,
DirichletBoundary
=
bdrD
,
RobinBoundary
=
bdrN
)
plotter
=
HSEngine
(
solver
.
V
)
else
:
solver
=
HFSAEngine
(
mesh
=
mesh
,
wavenumber
=
k0
,
FEDegree
=
3
,
forcingTerm
=
forcingTerm
,
DirichletBoundary
=
bdrD
,
RobinBoundary
=
bdrN
)
plotter
=
HSAEngine
(
solver
.
V
,
2
)
approx
=
RB
(
solver
,
plotter
,
ks
=
k0s
,
approxParameters
=
params
)
approx
.
plotApp
(
ktar
,
name
=
'u_RB'
)
approx
.
plotHF
(
ktar
,
name
=
'u_HF'
)
approx
.
plotErr
(
ktar
,
name
=
'err'
)
appErr
,
solNorm
=
approx
.
approxError
(
ktar
),
approx
.
HFNorm
(
ktar
)
print
((
'SolNorm:
\t
{}
\n
Err:
\t
{}
\n
ErrRel:
\t
{}'
)
.
format
(
solNorm
,
appErr
,
np
.
divide
(
appErr
,
solNorm
)))
print
(
'
\n
Poles Pade'':'
)
print
(
approx
.
getPoles
(
True
))
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