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Fig 1: Project Schematic With the release of Mechanical 19.2, substructuring is now available for Modal & Rigid Dynamics without scripting. That just made my  earlier post on CMS outdated! Note that there is still a key limitation where Generation and Expansion Pass must be performed on your local machine. To get ahead of the game a bit, here is a way to do Harmonic Analysis extending on previous work . (Please go through that before this post). Some points of note: The method of merging the CMS and non-CMS models together into System C is the same. All files related to the superelement has to be copied over to the solver file directory as before. Modal analysis need not be performed first as the example here uses Full Method instead of Modal Superposition for simplicity.  The script expands the responses the same way as Modal Analysis does so the script will look familiar. Command Snippet for Combined Analysis D !!!!! Save full model fini /filnam...

Triangle Wave by Fourier Series * In the Ansys APDL documentation of Mode-Superposition Harmonic Analysis  and other Verification Manual documentation (e.g.  VM76 &  VM149 ), only load step file method was described. Personally, I favor  Multiple Solve Method  instead because you can vary the loads for different frequencies. This could come in handy for different loads at various engine orders or rotating unbalance force. Or say if you have the Fourier coefficients of the periodic force of irregular form (e.g. triangle wave ), the steady state response can be computed. The APDL script below replicates VM183  but uses the Multiple Solve Method. Do let me know if you could recommend ways to improve the script. Script !!   Modified from VM183 to use Multiple SOLVE Method !!   Results should be identical to VM183 ! Author: Sze Kwan (Jason) Cheah ! Modified: August 27, 2017 ! Disclaimer: Use at own risk! /PREP7 ANTYPE, MODAL ...