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OpenVOGEL / Tucan

Tucan remains among the simplest and most user friendly programs for aerodynamics based on vortex lattice methods. This project is unique in many ways, while the most prominent feature is that it is entirely based in .NET. Recompiling the project is very easy and you can have tons of fun extending the source code.
http://www.openvogel.org/main
GNU General Public License v3.0
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Test and verification of stiffness and mass matrices needed #12

Closed GuillermoHazebrouck closed 6 years ago

GuillermoHazebrouck commented 8 years ago

We have to check the composition of the stiffness and mass matrices at both, element and structural levels. This is critical to leave the Beta-phase.

GuillermoHazebrouck commented 6 years ago

Local stiffness matrix is OK. Transformation to global needs to be checked.

GuillermoHazebrouck commented 6 years ago

I have found several important issues in the composition of the element Mass matrix (wrong signs and coeficients). These will be corrected in the next update. The bugfix will include a full migration to DotNumerics (we will no longer use MetaNumerics DLL), and the enrichment of our DotNumerics library with the Jacobi and Subspace iteration method for eigen values. The idea is also to use this later method instead of backwards iteration. This update will probably come in less than a few months :-)