Craig Bampton Method
In a previous post , the Craig -Bampton (CB) substructuring method was used in Ansys to simplify a part for reuse. To learn more about what Ansys does in the background, I did some reading up. Here are some good resources: Resources Original Paper link FEMCI general description: link My Go-to Primer link Tom Irvine's tutorial papers and Matlab scripts link Octave/Matlab Scripts Inspired by Tom's Matlab script, I coded a script to condense two 'random' bodies, keep only 10 modes of each body with 3 nodal interface points between them. The 'random' bodies are positive definite matrix that is generated randomly for each run to represent two mass and stiffness matrices. Running the script again would generate a different system and different plots. Here are the links to the two Octave/Matlab scripts used to create the plots below: Main Script: Random2PartsCB.m link (run this one) Minion Script: CraigBampton.m link A run of the script may yie...