Learning Forum

[jean.collomb]

Hi,

I am currently doing a spectrum analysis and I am comparing two methods:

1. First, I use an existing APDL script ;
2. Then, I try to do the same with Workbench Mechanical.

In the APDL script, I have 2 commands for damping :

1. DMPRAT : where my damping coefficient is implemented ;
2. SV : where my damping coefficient and my spectrum is implemented.

However, when I use Workbench Mechanical, in the spectrum system, I implement the damping coefficient. But when I look at the file.dat, I only see the damping coefficient in the DMPRAT command. The SV command contain spectrum values, but not the damping coefficient.

When I compare results between these two methods, I obtain different results (due to the damping I suppose).

My questions is:

1. When I want to implement damping in a spectrum analysis (in Ansys Classic ou Workbench Mechanical), which command should I use ? (DMPRAT, SV, both ?)

Thanks for your answer,

Regards,

Jean

 

[danielshaw]

How are you applying damping in Mechanical?