Modal analysis

Sai Vignesh

Hi 

 

When solving normal modes analysis

 

Using EIGRL there are two types of normalization

 

1.Mass normalization

2.Max normalization

 

There is no difference in response or frequency

 

Kindly give some examples when and where each is used 

 

and if possible specific application for each

 

Thanks in advance

Rahul Rajan_21763

In vibration analysis, eigenvectors are normalized with respect to the mass matrix by default.

In buckling analysis, eigenvectors are normalized to have unit value. NORM = MASS is not a valid option for linear buckling analysis. If NORM is set to MASS for linear buckling analysis, Altair OptiStruct automatically switches to MAX normalization.