Static analysis

静态分析

本例展示了如何使用 PyDPF-Post 对静态分析的结果文件进行后处理。

Perform required imports

执行所需的导入

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

Get Solution object

获取 ``Solution`` 对象

# 此示例加载了一个在 Ansys Mechanical 中计算的静态分析结果文件。

example_path = examples.download_all_kinds_of_complexity()

solution = post.load_solution(example_path)
print(solution)

Static Analysis Solution object.


Data Sources
------------------------------
DPF  DataSources:
  Result files:
     result key: rst and path: C:\Users\ff\AppData\Roaming\Python\Python310\site-packages\ansys\dpf\core\examples\result_files\testing\allKindOfComplexity.rst
  Secondary files:


DPF Model
------------------------------
Static analysis
Unit system: MKS: m, kg, N, s, V, A, degC
Physics Type: Mechanical
Available results:
     -  displacement: Nodal Displacement
     -  reaction_force: Nodal Force
     -  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
     -  thermal_strain: ElementalNodal Thermal Strains
     -  thermal_strains_eqv: ElementalNodal Thermal Strains eqv
     -  swelling_strains: ElementalNodal Swelling Strains
     -  structural_temperature: ElementalNodal Temperature
------------------------------
DPF  Meshed Region:
  15129 nodes
  10292 elements
  Unit: m
  With solid (3D) elements, shell (2D) elements, shell (3D) elements, beam (1D) elements
------------------------------
DPF  Time/Freq Support:
  Number of sets: 1
Cumulative     Time (s)       LoadStep       Substep
1              1.000000       1              1

Get Result objects

获取 ``Result`` 对象

Get displacement result

获取位移 ``Result`` 对象

disp_result = solution.displacement()
disp = disp_result.vector
print(disp)

Displacement result.

This result has been computed using dpf.core.Operator objects, which
have been chained together according to the following list:
- U: Result operator. Compute the desired result.

Check number of fields

Check the number of fields.

print(disp.num_fields)

1

Get data from field

Get data from a field.

print(disp.get_data_at_field(0))

[[ 9.84182297e-06  5.13025031e-06 -6.66435651e-07]
 [ 9.95996777e-06  4.93526360e-06 -6.25236961e-07]
 [ 9.93154893e-06  5.88552090e-06 -7.83251832e-07]
 ...
 [ 5.00000000e-03 -1.54556837e-04  0.00000000e+00]
 [ 5.00000000e-03 -1.56813550e-04  0.00000000e+00]
 [ 5.00000000e-03 -1.66125455e-04  0.00000000e+00]]

Get maximum data value over all fields

获取所有 fields 的最大数据值

print(disp.max_data)

[[8.50619058e+04 1.04659292e+01 3.73620870e+05]]

Get minimum data value over all fields

获取所有 fields 的最小数据值

print(disp.min_data)

[[-1.82645944e-06 -1.04473039e+01 -2.94677257e-04]]

Get maximum data value over targeted field

获取目标 fields 的最大数据值

print(disp.get_max_data_at_field(0))

[8.50619058e+04 1.04659292e+01 3.73620870e+05]

Get minimum data value over all fields

获取目标 fields 的最小数据值

print(disp.get_min_data_at_field(0))

[-1.82645944e-06 -1.04473039e+01 -2.94677257e-04]

Get stress result

获取张量的应力 ``Result`` 对象

stress_result = solution.stress()
stress = stress_result.tensor

Check number of fields

检查不同 fields 中壳单元和实体单元的数量。

print(stress.num_fields)

2

Get shell field

Get the shell field.

shell_field = stress[0]
print(shell_field.shell_layers)

shell_layers.nonelayer

Get solid field

Get the solid field.

solid_field = stress[1]

Plot contour

绘制等值线图

stress.plot_contour()

Get elastic strain result

获得弹性应变结果

elastic_strain_result = solution.elastic_strain()
elastic_strain = elastic_strain_result.tensor

Check number of fields

检查不同 fields 中壳单元和实体单元的数量。

print(elastic_strain.num_fields)

2

如果结果文件中包含，则可以使用此方法获取弹性应变结果。

print(solution.plastic_strain())

Tensor object.

Object properties:
 - location   : Nodal

Plastic strain object.

您也可以使用这种方法获得温度结果。

print(solution.structural_temperature())

Scalar object.

Object properties:
 - location   : Nodal

Structural temperature object.