Extract results on named selections - Modal Simulation#

In this script static simulation is processed to extract results like stress, displacement. Selecting sub parts of the results by scoping on specific nodes, elements is also displayed here.

Perform required imports#

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_modal_frame()
# 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/3.10.13/x64/lib/python3.10/site-packages/ansys/dpf/core/examples/result_files/modal/frame.rst

DPF Model
------------------------------
Modal analysis
Unit system: NMM: mm, ton, N, s, mV, mA, degC
Physics Type: Mechanical
Available results:
     -  displacement: Nodal Displacement
     -  stress: ElementalNodal Stress
     -  elastic_strain: ElementalNodal Strain
     -  element_euler_angles: ElementalNodal Element Euler Angles
------------------------------
DPF  Meshed Region:
  5886 nodes
  2842 elements
  Unit: mm
  With solid (3D) elements
------------------------------
DPF  Time/Freq Support:
  Number of sets: 6
Cumulative     Frequency (Hz) LoadStep       Substep
1              253.615690     1              1
2              317.918491     1              2
3              329.825709     1              3
4              575.619678     1              4
5              621.973976     1              5
6              667.364882     1              6

Get the available named selections#

print(simulation.named_selections)
['BAR_1', 'BAR_2', 'FACES_INTERIOR_PINS', '_FIXEDSU']

Extract displacements on named selections#

bar1_tot_displacement = simulation.displacement(named_selections=["BAR_1"], norm=True)
print(bar1_tot_displacement)
bar1_tot_displacement.plot()

bar2_tot_displacement = simulation.displacement(named_selections=["BAR_2"], norm=True)
print(bar2_tot_displacement)
bar2_tot_displacement.plot()

# both
tot_displacement = simulation.displacement(
    named_selections=["BAR_1", "BAR_2"], norm=True
)
print(tot_displacement)
tot_displacement.plot()
  • 01 named selections modal simulation
  • 01 named selections modal simulation
  • 01 named selections modal simulation
 results   U_N (mm)
 set_ids          1
node_ids
      72 6.2179e-01
      73 5.0563e-01
      74 2.4093e-01
      75 2.2909e-01
      76 4.8153e-01
      77 4.7876e+00
     ...        ...


 results   U_N (mm)
 set_ids          1
node_ids
      17 5.0483e-01
      18 7.7196e-01
      19 1.2061e+00
      20 2.1481e+00
      21 3.3862e+00
      22 0.0000e+00
     ...        ...


 results   U_N (mm)
 set_ids          1
node_ids
      72 6.2179e-01
      73 5.0563e-01
      74 2.4093e-01
      75 2.2909e-01
      76 4.8153e-01
      77 4.7876e+00
     ...        ...

Extract stress and averaged stress on named selections#

eqv_stress = simulation.stress_eqv_von_mises_nodal(named_selections=["_FIXEDSU"])
print(eqv_stress)

# without selection
elemental_stress = simulation.stress_elemental(named_selections=["BAR_1"])
print(elemental_stress)
elemental_stress.plot()
01 named selections modal simulation
 results S_VM (MPa)
 set_ids          1
node_ids
      22 8.0765e+02
     349 1.0934e+03
      15 1.0859e+03
     371 7.3710e+02
     406 3.4030e+02
     408 4.1398e+02
     ...        ...


               results    S (MPa)
               set_ids          1
element_ids components
       1137         XX 2.1033e+02
                    YY 1.4585e+02
                    ZZ 6.4862e+02
                    XY 7.8062e+00
                    YZ 3.9888e+01
                    XZ 1.3070e+01
        ...        ...        ...

Total running time of the script: (0 minutes 2.768 seconds)

Gallery generated by Sphinx-Gallery