Extract results on named selections - Modal Simulation

提取指定选项的结果 —— 模态分析

该脚本对静态模拟进行处理，以提取应力、位移等结果。此外，还可通过对特定节点、单元进行扫描来选择结果的子部分。

Perform required imports

执行所需的导入

本示例使用了一个提供的文件，您可以通过导入 DPF examples 包获得该文件。

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

Get the Simulation object

获取允许访问结果的 ``Simulation`` 对象

必须使用结果文件的路径实例化 Simulation 对象。例如，Windows 下为 "C:/Users/user/my_result.rst" 或 Linux 下为 "/home/user/my_result.rst" 。

example_path = examples.download_modal_frame()
# 自动检测模拟类型，请使用
simulation = post.load_simulation(example_path)

# 要启用 auto-completion 功能，请使用等效的命令：
simulation = post.ModalMechanicalSimulation(example_path)

# 打印 simulation ，了解可用内容的概况
print(simulation)

Modal Mechanical Simulation.


Data Sources
------------------------------
C:\Users\ff\AppData\Roaming\Python\Python310\site-packages\ansys\dpf\core\examples\result_files\modal\frame.rst

DPF Model
------------------------------
Modal analysis
Unit system: NMM: mm, ton, N, s, mA, degC
Physics Type: Mechanical
Available results:
     -  displacement: Nodal Displacement
     -  stress: ElementalNodal Stress
     -  elastic_strain: ElementalNodal Strain
------------------------------
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

获取可用的已命名选区（组件）

print(simulation.named_selections)

['BAR_1', 'BAR_2', 'FACES_INTERIOR_PINS', '_FIXEDSU']

Extract displacements on named selections

提取指定选区的位移

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()

• 
• 
• 

 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

提取已命名选区上的应力和平均应力

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

# without selection
elemental_stress = simulation.stress_elemental(named_selections=["BAR_1"])
print(elemental_stress)
elemental_stress.plot()

• 
• 

 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
        ...        ...        ...