F2d is an implementation of the matrix stiffness method in Matlab/Octave. Unlike most other implementations out there, this one does not stop at the computation of nodal displacements. F2d also computes internal forces and reaction forces out of the box. For downstream-applications, it also supports the evaluation of displacements (in local and global coordinates) and internal forces at arbitrary points along the beam.
The relatively slim code-basis allows easy customization, extension and integration into real-world engineering applications.
Here are the features at a glance:
- intuitive and efficient syntax for input files
- rotated supports with optional stiffness
- (possibly rotated) beam-end hinges (displacement- and rotation hinges) specifiable in global- and beam-local direction
- direct computation of reaction forces
- evaluation of section forces:
- on any location via
polyval - beam-end values
- local extrema and their location
- on any location via
- graphical output for checking the correctness of input file
- results easily accessible via an intuitive data structure
The existing publicly available codes did either not provide the features I needed and/or were too complex to adapt to my needs.
Download the project as a ZIP file (or clone the git repo) to a location on your computer. In Matlab, add the F2d folder to your path. Done!
Open and run the example.m script to see how F2d can be used. This loads an input file, displays the system, runs the computation and plots the results on screen and console.
The example is pretty self-explanatory, so go ahead and explore the program from there.
above: example system with load
above: results (internal forces) of example system
See the input file 100.inp for a commented example.
If you have implemented a feature that you think others find useful too, send me a pull-request. If you need a feature implemented for you, feel free to contact me directly.
This software are rigorously tested, but mistakes can slip through anyways. Hence, use of this software is at your own risk! I can not be held liable for damages resulting from using this software. See also the license terms for details.