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Python interface to LS-DYNA Service

Project description


PyAnsys Python PyPI GH-CI Codecov MIT Black


PyDYNA is a Pythonic package for providing a more convenient and complete way to build an Ansys DYNA input deck, submit it to the Ansys LS-DYNA solver, and finally postprocess the results.

PyDYNA contains two submodules, ansys.dyna.core.pre and ansys.dyna.core.solver

  • pre: This module provides highly abstracted APIs for creating and setting up DYNA input decks. There are many classes supported, namely, DynaMech, DynaIGA, DynaICFD, DynaSALE, DynaEM,DynaNVH, DynaMaterial, DynaISPH, DynaICFD and DynaAirbag. Each of these classes can be used to generate LS-DYNA keywords. Since these classes have high-level abstraction, each function call generates groups of keywords needed to define an input in LS-DYNA.

  • solver: This API provides features to interact directly with the Ansys LS-DYNA solver. LS-DYNA is primarily a batch solver with very limited interactive capabilities, the solver service provides a way to push input files to the LS-DYNA solver, monitor the state of the running job, change the value of a load curve and finally retrieve result files back from the server

Once you have results, you can use the Ansys Data Processing Framework (DPF), which is designed to provide numerical simulation users and engineers with a toolbox for accessing and transforming simulation data. DPF can access data from Ansys solver files and from several files with neutral formats, including CSV, HDF5, and VTK. Using DPF’s various operators, you can manipulate and transform this data.

The ansys-dpf-post package provides a simplified Python interface to DPF, thus enabling rapid postprocessing without ever leaving a Python environment. For more information on DPF-Post, see the DPF-Post documentation.

Documentation and issues

Documentation for the latest stable release of PyDyna is hosted at PyDYNA documentation.

For examples on how to use PyDYNA, see Examples in the PyDYNA documentation.

In the upper right corner of the documentation’s title bar, there is an option for switching from viewing the documentation for the latest stable release to viewing the documentation for the development version or previously released versions.

On the PyDYNA Issues page, you can create issues to report bugs and request new features. On the PyDYNA Discussions page or the Discussions page on the Ansys Developer portal, you can post questions, share ideas, and get community feedback.

To reach the project support team, email


PyDYNA is licensed under the MIT license.

PyDYNA makes no commercial claim over Ansys whatsoever. This library extends the functionality of Ansys LS-DYNA by adding a Python interface to LS-DYNA without changing the core behavior or license of the original software. The use of the interactive control of PyDYNA requires a legally licensed local copy of LS-DYNA.

For more information on LS-DYNA, see the Ansys LS-DYNA page on the Ansys website.

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