Nonlinear finite element analysis
OpenSees features state-of-the-art finite element formulations and solution algorithms, including mixed formulations for beams and solids, over 200 material models, and an extensive collection of continuation algorithms to solve highly nonlinear problems.Get started with basic examples
The bleeding edge of finite element modeling
Interactive
Easily return stiffness, mass, and damping matrices as NumPy arrays and join meshes without duplicate nodes and constraints.
Check the introduction
Interoperable
Thanks to a rich open-source ecosystem, tools are available for interfacing OpenSees with a wide variety of industry-standard tools.
Ecosystem
Interactive
Easily return stiffness, mass, and damping matrices as NumPy arrays and join meshes without duplicate nodes and constraints.
Check the introduction
Interoperable
Thanks to a rich open-source ecosystem, tools are available for interfacing OpenSees with a wide variety of industry-standard tools.
EcosystemAn open source ecosystem
OpenSeesRT is open source and maintains its codebase in GitHub . It is supported by a thriving ecosystem of open-source packages, such as osmg , sees , and openbim .
osmg
osmg is a Python library for generating building models in OpenSees.
Visualization with `sees`
sees is an open-source finite element visualization framework. Using a mobile-first approach, it provides several functions and components to simplify the creation of responsive websites.
Explore examplesOpenBIM
Import models from commercial pre-processors.
Example