Reply To: Probem with modal Analysis

[leoack]

Hello Erik,

at the moment I am more concerned with why I get these high deformations of singular panels and not the global modes. Without the dry modes it doesn't make sense to look into wet modes. Since I have the functioning FEMAP model I am sure that I have all masses and since they are all connected it should give me the same result if I don't need to implement a Guyan reduction like in FEMAP (Nastran ASET constraint). If I have the list of Master nodes from FEMAP can I somehow implement the Guyan reduction in APDL? I looked into substructuring but that seems to be for different applications, would I have to assign the slave nodes to each master node manually?