Extract components of results - Modal Simulation#

In this script, a modal simulation is processed to extract sub-components of results like elastic strain and displacement.

Perform required imports#

This example uses a supplied file that you can get by importing the DPF examples package.

from ansys.dpf import post
from ansys.dpf.post import examples

Get Simulation object#

Get the Simulation object that allows access to the result. The Simulation object must be instantiated with the path for the result file. For example, "C:/Users/user/my_result.rst" on Windows or "/home/user/my_result.rst" on Linux.

example_path = examples.download_all_kinds_of_complexity_modal()
# to automatically detect the simulation type, use:
simulation = post.load_simulation(example_path)

# to enable auto-completion, use the equivalent:
simulation = post.ModalMechanicalSimulation(example_path)
# print the simulation to get an overview of what's available
print(simulation)
Modal Mechanical Simulation.


Data Sources
------------------------------
/opt/hostedtoolcache/Python/3.10.14/x64/lib/python3.10/site-packages/ansys/dpf/core/examples/result_files/testing/modal_allKindOfComplexity.rst

DPF Model
------------------------------
Modal analysis
Unit system: MKS: m, kg, N, s, V, A, degC
Physics Type: Mechanical
Available results:
     -  displacement: Nodal Displacement
     -  reaction_force: Nodal Force
     -  elemental_summable_miscellaneous_data: Elemental Elemental Summable Miscellaneous Data
     -  element_nodal_forces: ElementalNodal Element nodal Forces
     -  stress: ElementalNodal Stress
     -  elemental_volume: Elemental Volume
     -  stiffness_matrix_energy: Elemental Energy-stiffness matrix
     -  artificial_hourglass_energy: Elemental Hourglass Energy
     -  thermal_dissipation_energy: Elemental thermal dissipation energy
     -  kinetic_energy: Elemental Kinetic Energy
     -  co_energy: Elemental co-energy
     -  incremental_energy: Elemental incremental energy
     -  elastic_strain: ElementalNodal Strain
     -  element_euler_angles: ElementalNodal Element Euler Angles
     -  elemental_non_summable_miscellaneous_data: Elemental Elemental Non Summable Miscellaneous Data
     -  structural_temperature: ElementalNodal Structural temperature
------------------------------
DPF  Meshed Region:
  2388 nodes
  1836 elements
  Unit: m
  With solid (3D) elements, shell (2D) elements, shell (3D) elements, beam (1D) elements
------------------------------
DPF  Time/Freq Support:
  Number of sets: 45
Cumulative     Frequency (Hz) LoadStep       Substep
1              4800.665229    1              1
2              6472.119402    1              2
3              10094.813112   1              3
4              15408.070193   1              4
5              19935.616102   1              5
6              30659.224027   1              6
7              33485.028985   1              7
8              40514.020302   1              8
9              41144.836724   1              9
10             41696.364343   1              10
11             42568.142453   1              11
12             48803.935725   1              12
13             51557.014600   1              13
14             54829.807966   1              14
15             55121.065060   1              15
16             55481.661956   1              16
17             55779.054274   1              17
18             56346.453210   1              18
19             56598.396154   1              19
20             57504.056787   1              20
21             57768.209089   1              21
22             60135.893137   1              22
23             62336.016111   1              23
24             62809.029190   1              24
25             64186.171203   1              25
26             64911.479227   1              26
27             66488.724651   1              27
28             66728.182829   1              28
29             67521.333063   1              29
30             68699.230845   1              30
31             70108.268581   1              31
32             71432.124756   1              32
33             71784.765113   1              33
34             73189.275762   1              34
35             74862.553459   1              35
36             75051.318416   1              36
37             76335.025905   1              37
38             76631.728520   1              38
39             76956.786796   1              39
40             77754.144888   1              40
41             78460.122703   1              41
42             78721.878185   1              42
43             79330.520798   1              43
44             80301.992725   1              44
45             80835.840814   1              45

Extract X displacement over a list modes#

Printing the time freq support can help pick the right modes

print(simulation.time_freq_support)

# To get X displacements on the first 2 modes
x_displacement = simulation.displacement(modes=[1, 2], components=["X"])
# equivalent to
x_displacement = simulation.displacement(set_ids=[1, 2], components=["X"])
print(x_displacement)

x_displacement.plot(set_id=1)
02 modal extract sub results
DPF  Time/Freq Support:
  Number of sets: 45
Cumulative     Frequency (Hz) LoadStep       Substep
1              4800.665229    1              1
2              6472.119402    1              2
3              10094.813112   1              3
4              15408.070193   1              4
5              19935.616102   1              5
6              30659.224027   1              6
7              33485.028985   1              7
8              40514.020302   1              8
9              41144.836724   1              9
10             41696.364343   1              10
11             42568.142453   1              11
12             48803.935725   1              12
13             51557.014600   1              13
14             54829.807966   1              14
15             55121.065060   1              15
16             55481.661956   1              16
17             55779.054274   1              17
18             56346.453210   1              18
19             56598.396154   1              19
20             57504.056787   1              20
21             57768.209089   1              21
22             60135.893137   1              22
23             62336.016111   1              23
24             62809.029190   1              24
25             64186.171203   1              25
26             64911.479227   1              26
27             66488.724651   1              27
28             66728.182829   1              28
29             67521.333063   1              29
30             68699.230845   1              30
31             70108.268581   1              31
32             71432.124756   1              32
33             71784.765113   1              33
34             73189.275762   1              34
35             74862.553459   1              35
36             75051.318416   1              36
37             76335.025905   1              37
38             76631.728520   1              38
39             76956.786796   1              39
40             77754.144888   1              40
41             78460.122703   1              41
42             78721.878185   1              42
43             79330.520798   1              43
44             80301.992725   1              44
45             80835.840814   1              45


  results     U_X (m)
  set_ids           1          2
 node_ids
      289 -1.1710e+00 3.0726e+00
      573 -1.6975e+00 3.1432e+00
      589 -2.2447e+00 3.3385e+00
      591 -1.5945e+00 3.6033e+00
      324  0.0000e+00 0.0000e+00
      579  0.0000e+00 0.0000e+00
      ...         ...        ...

Extract XX and XY elastic strain over a list modes#

To get X displacements on the first 2 modes

XX_XY_elastic_strain = simulation.elastic_strain_nodal(
    modes=[3], components=["XX", "XY"]
)
print(XX_XY_elastic_strain)
            results EPEL
            set_ids    3
            elshape    1
node_ids components
     289         XX
                 XY
     573         XX
                 XY
     589         XX
                 XY
     ...        ...  ...

Total running time of the script: (0 minutes 1.257 seconds)

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