FRF Response
Altair EmployeeI would like to know if when I do the FRF in OptiStruct the result obtained is normalized by the mass, if it has some other type of normalization or if the result is 'pure'?
Answers
-
FRF response is normalized to the input.
If you are using modal frf, eigenvectors are normalized to mass by default. But that can be changed in EIGRL card.
0 -
How do I change this?
0 -
Altair Forum User said:
FRF response is normalized to the input.
If you are using modal frf, eigenvectors are normalized to mass by default. But that can be changed in EIGRL card.
How do I change this?
0 -
as @Girish posted you can change in EIGRL card when you are using Modal Freq. Response analysis.
Card edit the EIRGL card to find NORM and you can change from MASS to MAX where EigenVectors are normalized unit value of largest eigenvector displacement and this is only valid for linear buckling analysis and MASS is valid for vibration analysis.
<?xml version="1.0" encoding="UTF-8"?>
0
