.. DO NOT EDIT. .. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY. .. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE: .. "examples\02-Performance-Improvements\02-mesh-skin.py" .. LINE NUMBERS ARE GIVEN BELOW. .. only:: html .. note:: :class: sphx-glr-download-link-note :ref:`Go to the end ` to download the full example code .. rst-class:: sphx-glr-example-title .. _sphx_glr_examples_02-Performance-Improvements_02-mesh-skin.py: .. _ref_mesh_skin_example: Reduce Model Size by using Mesh Skin for Result and Mesh extraction =================================================================== **通过使用网格蒙皮进行结果和网格提取来减小模型尺寸** 该示例显示了静态分析中对蒙皮网格的后处理。在重建蒙皮网格时，将使用新的 surface 单元连接 solid 网格外部蒙皮上的节点。这些 surface 单元的类型是根据所有节点都位于表皮上的 solid 单元面来选择的。 该功能适用于所有类型的 Mechanical 仿真，允许您缩小网格和提取数据的大小，以提高处理性能。由于较大的应力和应变通常位于模型的表皮，因此在大多数情况下，在表皮上计算出的结果与最大值相当。 单元或单元节点结果的后处理需要单元实体到表皮的映射，以便从实体单元结果得到面单元结果。建立在表皮上的新 surface 单元的连通性与实体单元的连通性不同，因此在结果平均化后会发现微小的差异。 .. GENERATED FROM PYTHON SOURCE LINES 14-17 Perform required imports ------------------------ **执行所需的导入** .. GENERATED FROM PYTHON SOURCE LINES 19-20 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。 .. GENERATED FROM PYTHON SOURCE LINES 20-24 .. code-block:: Python from ansys.dpf import post from ansys.dpf.post import examples .. GENERATED FROM PYTHON SOURCE LINES 25-28 Get ``Simulation`` object ---------------------------- **将结果文件加载到允许访问结果的 ``Simulation`` 对象中。** .. GENERATED FROM PYTHON SOURCE LINES 30-31 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"`` 。 .. GENERATED FROM PYTHON SOURCE LINES 31-44 .. code-block:: Python example_path = examples.download_crankshaft() # 自动检测模拟类型，请使用 simulation = post.load_simulation(example_path) # 要启用自动完成功能，请使用等效的命令： simulation = post.StaticMechanicalSimulation(example_path) # 打印 simulation，了解可用内容的概况 print(simulation) .. rst-class:: sphx-glr-script-out .. code-block:: none Static Mechanical Simulation. Data Sources ------------------------------ C:\Users\ff\AppData\Roaming\Python\Python310\site-packages\ansys\dpf\core\examples\result_files\crankshaft\crankshaft.rst DPF Model ------------------------------ Static analysis Unit system: MKS: m, kg, N, s, V, A, degC Physics Type: Mechanical Available results: - displacement: Nodal Displacement - velocity: Nodal Velocity - acceleration: Nodal Acceleration - reaction_force: Nodal Force - 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 - structural_temperature: ElementalNodal Temperature ------------------------------ DPF Meshed Region: 69762 nodes 39315 elements Unit: m With solid (3D) elements ------------------------------ DPF Time/Freq Support: Number of sets: 3 Cumulative Time (s) LoadStep Substep 1 1.000000 1 1 2 2.000000 1 2 3 3.000000 1 3 .. GENERATED FROM PYTHON SOURCE LINES 45-48 Extract displacement data ------------------------- **提取位移数据** .. GENERATED FROM PYTHON SOURCE LINES 50-51 提取蒙皮上的位移数据。 .. GENERATED FROM PYTHON SOURCE LINES 51-58 .. code-block:: Python displacement_skin = simulation.displacement(skin=True) displacement_skin.plot() print(f"number of nodes with `skin=True`: {len(displacement_skin.index.mesh_index)}") print(f"number of nodes with `skin=False`: {len(simulation.mesh.node_ids)}") .. image-sg:: /examples/02-Performance-Improvements/images/sphx_glr_02-mesh-skin_001.png :alt: 02 mesh skin :srcset: /examples/02-Performance-Improvements/images/sphx_glr_02-mesh-skin_001.png :class: sphx-glr-single-img .. rst-class:: sphx-glr-script-out .. code-block:: none number of nodes with `skin=True`: 33045 number of nodes with `skin=False`: 69762 .. GENERATED FROM PYTHON SOURCE LINES 59-62 Extract stress/strain data -------------------------- **提取应力/应变数据** .. GENERATED FROM PYTHON SOURCE LINES 64-66 提取蒙皮上的应力或弹性应变数据。 平均化和不变量计算是通过 solid 到 skin 的连续性映射完成的。 .. GENERATED FROM PYTHON SOURCE LINES 66-79 .. code-block:: Python elemental_stress_skin = simulation.stress_principal_elemental(components=[1], skin=True) elemental_stress_skin.plot() print( f"number of elements with `skin=True`: {len(elemental_stress_skin.index.mesh_index)}" ) print(f"number of elements with `skin=False`: {len(simulation.mesh.element_ids)}") elastic_strain_eqv_skin = simulation.elastic_strain_eqv_von_mises_nodal(skin=True) elastic_strain_eqv_skin.plot() .. rst-class:: sphx-glr-horizontal * .. image-sg:: /examples/02-Performance-Improvements/images/sphx_glr_02-mesh-skin_002.png :alt: 02 mesh skin :srcset: /examples/02-Performance-Improvements/images/sphx_glr_02-mesh-skin_002.png :class: sphx-glr-multi-img * .. image-sg:: /examples/02-Performance-Improvements/images/sphx_glr_02-mesh-skin_003.png :alt: 02 mesh skin :srcset: /examples/02-Performance-Improvements/images/sphx_glr_02-mesh-skin_003.png :class: sphx-glr-multi-img .. rst-class:: sphx-glr-script-out .. code-block:: none number of elements with `skin=True`: 16992 number of elements with `skin=False`: 39315 .. GENERATED FROM PYTHON SOURCE LINES 80-83 Extract the external layer on a selection of elements ----------------------------------------------------- 提取选定单元上的外部图层 .. GENERATED FROM PYTHON SOURCE LINES 83-91 .. code-block:: Python all_elements = simulation.mesh.element_ids elements = [] for i in range(0, int(all_elements.size / 2)): elements.append(all_elements[i]) elemental_stress_skin = simulation.stress_principal_elemental(skin=elements) elemental_stress_skin.plot() .. image-sg:: /examples/02-Performance-Improvements/images/sphx_glr_02-mesh-skin_004.png :alt: 02 mesh skin :srcset: /examples/02-Performance-Improvements/images/sphx_glr_02-mesh-skin_004.png :class: sphx-glr-single-img .. GENERATED FROM PYTHON SOURCE LINES 92-95 这段代码首先从 simulation.mesh 中获取所有单元的 ID，并将其存储在 all_elements 中。 然后，代码创建了一个空列表 elements，并将 all_elements 的前半部分添加到 elements 中。这是通过一个 for 循环实现的，循环的次数是 all_elements.size / 2（即 all_elements 的大小的一半）。 接着，代码调用 simulation 对象的 stress_principal_elemental 方法，获取 elements 中单元的主应力信息。参数 skin=elements 表示只考虑 skin 中的单元。 最后，代码使用 plot 方法绘制了主应力的图。 .. rst-class:: sphx-glr-timing **Total running time of the script:** (0 minutes 2.947 seconds) .. _sphx_glr_download_examples_02-Performance-Improvements_02-mesh-skin.py: .. only:: html .. container:: sphx-glr-footer sphx-glr-footer-example .. container:: sphx-glr-download sphx-glr-download-jupyter :download:`Download Jupyter notebook: 02-mesh-skin.ipynb <02-mesh-skin.ipynb>` .. container:: sphx-glr-download sphx-glr-download-python :download:`Download Python source code: 02-mesh-skin.py <02-mesh-skin.py>` .. only:: html .. rst-class:: sphx-glr-signature `Gallery generated by Sphinx-Gallery `_