If someone can help me, I'm modelling a L shape (Cross Bracing) on a pipe rack structure which is vibrating significantly.
When I'm going to run the dynamic analysis to determine the natural frequency, The system requires to set the control paramethers, specially the one that says if it is a lumped mass or consistent mass.
Would someone explain me what is the difference between these 2 options and which is the one I need to use.........????? Is the system automatically giving me the lumped masses......??
Using consistent mass I got 9 natural frequencies starting with 2.5 Hz, which is the one I could merely visualize in the field.
I appreciate your support on this matter.
Regards.........