Stuck? 
support@mecway.com
support@mecway.com
Mecway
FEA
Modal Analysis of Axial Flow Rotors / Fans
Hello!
Does anyone have any experience with the constraints / boundary conditions involved when performing modal analysis on axial compressor / turbine rotors? I've searched through many different sources and find contradicting and varying practices. Some constrain the root, some constrain the shaft ID, some use cyclic symmetry with fixed constraints, and some use cyclic symmetry WITHOUT fixed constraints.
The geometry I am using is an integrally bladed blisk, so there is no blade root. As of right now I think the best practice is to use cyclic symmetry with a fixed bore ID, but even then someone online said that no fixed constraints should be used since the whole system can be flexible.
I have tried many different ways and combinations but the results vary so much that I am afraid to just pick one and go with it. Does anyone have any personal experience with this?
Thanks!
Does anyone have any experience with the constraints / boundary conditions involved when performing modal analysis on axial compressor / turbine rotors? I've searched through many different sources and find contradicting and varying practices. Some constrain the root, some constrain the shaft ID, some use cyclic symmetry with fixed constraints, and some use cyclic symmetry WITHOUT fixed constraints.
The geometry I am using is an integrally bladed blisk, so there is no blade root. As of right now I think the best practice is to use cyclic symmetry with a fixed bore ID, but even then someone online said that no fixed constraints should be used since the whole system can be flexible.
I have tried many different ways and combinations but the results vary so much that I am afraid to just pick one and go with it. Does anyone have any personal experience with this?
Thanks!
Howdy, Stranger!
It looks like you're new here. If you want to get involved, click one of these buttons!