External CAD (Solidworks) Integration
========================================

PyFemtet allows parametric optimization even for analysis models created with external CAD (Solidworks) and imported into Femtet.

An example will be explained using an H-shaped steel that was parametrically modeled in an external CAD (Solidworks) and analyzed using Femtet's stress analysis solver to minimize volume while minimizing displacement.

.. note::

   Other than the sample code and execution results,
   the items are similar as in
   :doc:`../NX_ex01/NX_ex01`.



Sample File
------------------------------
.. note::

   Place the :download:`sample model<../_temporary_sample_files/cad_ex01_SW.SLDPRT>`
   and :download:`sample project<../_temporary_sample_files/cad_ex01_SW.femprj>` in the same folder, keep the project open in Femtet,
   and double-click on :download:`sample code<../_temporary_sample_files/cad_ex01_SW.py>` to execute.



Details as a FEM Problem
------------------------------

.. figure:: Sldworks_ex01_analysis.png
   :width: 450
   
   Appearance of the Model (and Analysis Conditions)

- fix ... Fully Fixed
- load ... Load in the -Z direction (1N)
- mirror ... Symmetrical to the XZ plane



Design Variables
------------------------------

.. figure:: Sldworks_ex01_model_dsgn.png
   :width: 450
   
   Appearance of the Model Section (and Design Variables)

============== ===============
Variable Name  Description
============== ===============
A              Web Tickness
B              Flange Tickness
C              Flange Bending
============== ===============



Sample Code
------------------------------

.. literalinclude:: ../_temporary_sample_files/cad_ex01_SW.py
   :language: python
   :linenos:
   :caption: cad_ex01_SW.py


Execution Result of the Sample Code
----------------------------------------

.. figure:: Sldworks_ex01_result.png
   :width: 450

   Execution result of Sldworks_ex01.py. The horizontal axis is von Mises stress, and the vertical axis is mass.

After 20 trials, a Pareto set of von Mises stress and mass is obtained.


.. note::

   Results may vary slightly depending on the versions of Femtet, PyFemtet, and the optimization engine it depends on.