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FLAPJAX — FLexible Aeroelastic Panel code in JAX

nonlinear · differentiable · adjoint-enabled

Tests cov Docs PyPI Python

FLAPJAX is a differentiable nonlinear aeroelastic analysis framework which couples a nonlinear structural model with unsteady vortex lattice method (UVLM) aerodynamics. This allows for a range of structural, aerodynamic and coupled analyses, with gradients available using the adjoint method. The full codebase is implemented in JAX, which allows for efficient automatic differentiation, GPU acceleration and multi-case parallelisation.

Full documentation, including tutorials, API reference and theory, is available at ben-l-p.github.io/flapjax.

Installation

Two PyPI distributions are provided:

Package Contents
flapjax Library only
flapjax-full Library + test suite + tutorial notebooks

Install one distribution — they provide the same flapjax import path.

pip install flapjax        # minimal
pip install flapjax-full   # includes tests and tutorial notebooks

Cloning the full repository and installing with uv is also supported, which allows for development installation:

uv sync

An extensive test suite is included to verify the correctness of the code. This verifies the numerics, and takes approximately 30 minutes to run on an M2 MacBook Air. Tests can be run with pytest, either against a flapjax-full install (pytest --pyargs flapjax) or from a repository clone (uv run pytest).

Release files for flapjax 1.2.0.dev0

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for flapjax 1.2.0.dev0
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Built distribution (wheel)

Table of built distributions (wheels) for flapjax 1.2.0.dev0
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flapjax-1.2.0.dev0-py3-none-any.whl Python 3 none any Details

Total release size: 3.4 MB

Release files / flapjax-1.2.0.dev0.tar.gz

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Release files / flapjax-1.2.0.dev0-py3-none-any.whl

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