Structural analysis in three dimensions. Load a 3D tower and orbit around the deformed shape, with every member colored by whether it's in tension or compression.
3D FEA — Space Frame StudioLive
3D direct stiffness · drag to orbit
Controls
A 3D tower under a lateral + vertical load at the top. Drag to orbit. Members colored by axial force.
Reading this result: Combined lateral 15 and vertical load bends the frame; peak node displacement is 3.161, and members recolor by axial force, cyan for tension and pink for compression.
Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.
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How it works
This extends the direct-stiffness method to 3D: each bar element has three translational degrees of freedom per node and a stiffness matrix built from its 3D direction cosines. PolySim assembles the global system, applies your supports and loads, solves for nodal displacements, and recovers axial member forces — the core of real space-frame and truss design.
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Is this 3D finite element analysis tool really free?▾
Yes. 3D FEA Space Frame runs entirely in your browser using your device's own compute, so local use is free forever. You only pay Compute Tokens if you scale a job to the cloud.
Do I need to install anything?▾
No. Everything runs client-side in a modern browser — no downloads, no license, no account required to start.
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How accurate are the results?▾
The solver uses established numerical methods, but results are for research and educational purposes and should be validated against experiment or professional review before you rely on them.