入门指南¶

简介¶

abqpy is a Python package that provides type hints for Abaqus Python scripting. You can use it to write your Abaqus Python scripts fluently. It also provides simple APIs to execute Abaqus commands, enabling you to build models, submit jobs, and extract output data in a single Python script, all without opening Abaqus/CAE.

安装¶

Make sure and are installed on your computer before installing abqpy.

你可以使用以下命令安装 abqpy。

pip install -U abqpy==2020.*
pip install -U abqpy2020

conda install conda-forge::abqpy=2020

pip install git+https://github.com/haiiliin/abqpy@2020

pip install -U abqpy[jupyter]==2020.*
pip install -U abqpy2020[jupyter]
pip install ipynbname nbconvert

两个 Python 解释器¶

Before proceeding, it's important to understand the concept of two different Python interpreters.

When you use the Abaqus/CAE graphical user interface (GUI) to create a model and visualize results, Abaqus/CAE internally issues commands after every operation. These commands reflect the geometry you created along with the options and settings you selected from each dialog box. The GUI generates commands in the Python programming language. The commands issued by the GUI are sent to the Abaqus/CAE kernel, which interprets the commands and uses the options and settings to create an internal representation of your model. The kernel is the computational engine behind Abaqus/CAE, while the GUI serves as the interface between you and the kernel.

In summary, Abaqus uses the Python language to interact with the Abaqus kernel. Everything that can be done in Abaqus/CAE can also be accomplished using Python scripts. Abaqus comes with a Python interpreter that enables Abaqus/CAE to interact with the Abaqus kernel.

For various reasons, we cannot directly use the Python interpreter inside Abaqus to build an Abaqus model independently. However, we can access it using commands provided by Abaqus:

abaqus cae
    [database=database-file]
    [replay=replay-file]
    [recover=journal-file]
    [startup=startup-file]
    [script=script-file]
    [noGUI=noGUI-file]
    [noenvstartup]
    [noSavedOptions]
    [noSavedGuiPrefs]
    [noStartupDialog]
    [custom=script-file]
    [guiTester=GUI-script]
    [guiRecord]
    [guiNoRecord]

Typically, we can use the noGUI-file or script-file options to execute your Python script in Abaqus.

The second Python interpreter is the one you install yourself, where abqpy is installed. abqpy provides a bridge connecting your Python script to the Abaqus Python interpreter. It provides type hints for Abaqus Python scripting, enabling you to write Abaqus Python scripts efficiently.

这个包是如何工作的？¶

abqpy is a package that provides type hints for Abaqus Python scripting. It is installed outside the Abaqus Python environment. You can use abqpy to write your Abaqus Python scripts and then run those scripts inside Abaqus manually. However, with the help of Abaqus commands, there's an easier approach: you can actually run the script using your own Python interpreter without opening Abaqus. This is achieved via the abaqus command like this:

abaqus cae noGUI=script.py

The mechanism is implemented in the run() function.
In this package, the abaqus module is reimplemented to automatically call this function. When you import this module at the top of your script (i.e., from abaqus import *), your Python interpreter (not the Abaqus Python interpreter) will call this function and use the abaqus command to submit the script to Abaqus. After the script is submitted to Abaqus, run() will exit the interpreter, because the script will already be running in the Abaqus Python interpreter.

In output scripts, you might not always want to use the abaqus module, since it requires the Abaqus/CAE kernel (and its license). Instead, you can use the odbAccess module (i.e., from odbAccess import *), which only requires the Abaqus Python interpreter. For this, a different abaqus command line is needed:

abaqus python script.py

因此，odbAccess 模块也被重新实现以调用带有参数 cae = False 的 run() 函数。

In summary, the run() function is called when you import either of the two modules (abaqus or odbAccess). It passes the argument cae = True for the abaqus module and cae = False for the odbAccess module. Therefore, if you want to run your Python script in the Abaqus Python environment, make sure to import one of these modules at the top of your script.

Write your Abaqus Python script¶

After installing the abqpy package, you can start writing your own Abaqus Python scripts to build your models. You can refer to the abqpy/examples at main · haiiliin/abqpy repository for script examples. Alternatively, you can check out 教程 for a simple tutorial. For more detailed documentation about Abaqus Python scripting, please see Abaqus Class References for comprehensive API references.

Set up your Abaqus environment¶

Ensure the abaqus command is available in the command line (i.e., you can run abaqus from the command line). If not, add a new system environment variable named ABAQUS_BAT_PATH and set its value to the file path of the Abaqus command. For example: C:/SIMULIA/Commands/abaqus.bat.

Run your Abaqus Python script¶

Now you can run your Abaqus Python script using the following methods:

• Open Abaqus/CAE and click Run Script in the menu bar, then select your script file. This is the most common way to run a Python script in Abaqus/CAE.

• 在命令行中使用 abaqus 命令：

  abaqus cae script=script.py
  

  更多关于 abaqus 命令的信息，请访问 这里。

• 在命令行中使用 abaqus 命令：

  [python -m] abqpy cae script.py
  

  The advantage of using the abqpy command instead of the abaqus command directly is that you can customize the default Python launch command. See 命令行接口 for more information about the abqpy command.

• 使用 Python 3 解释器直接运行脚本：

  python script.py
  

  This is the most convenient way to run the script. It is equivalent to the abqpy command with some default predefined arguments.

• 使用 abqpy.cli.abaqus 变量 (abqpy.cli.AbqpyCLI 对象) 运行脚本：

  from abqpy.cli import abaqus
  
  abaqus.cae(script="script.py")
  

  The abqpy.cli.abaqus object is used for the abqpy command. You can call the methods in this object directly to run the script. This method is convenient when you want to call the Abaqus Python script from another Python script, since typing annotations are provided for the methods. You can check the docstring of the methods for more information.

• 创建一个 Abaqus 模型

  

• 提取输出数据

  

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