Dynamic response to a concentrated harmonic force in ABAQUS 1

[EMANNN]

Hi everyone,

I am not an expert in structural analysis, but I need the data out of the structural simulation for my CFD analysis.

I am using ABAQUS for this study and the problem is quite simple. I have a concentrated sinusoidal force (F=a sin( omega*t)) exerted on a node and all I need is the velocity of the surface node for a few cycles. I need to know what is the best type of "ABAQUS step" for this purpose (acceptable acuracy+ not too computationally expensive). I don't know which of these steps is the most suitable for this application (Steady-state dynamic, dynamic explicit or dynamic implicit). Any suggestions?

Thanks a lot.

 

[Mustaine3]

If the problem is linear, then you should do an eigenfrequency step and afterwards steady-state dynamics (modal) step.

 

[EMANNN]

@Mustaine3

thanks a lot for the reply. As far as I understood, in the steady-state dynamic step, a range of frequencies must be selected and it computes the response of the system with respect to the defined loads in that frequency range. However, I have a single load with one specific frequency ( 2000Hz) and I am not interested in the response in other frequency ranges. Should I limit the frequency range to only 2000Hz in the steady-state dynamic step?

 

[Mustaine3]

The easiest is to use a range of 2000 to 2005 for example and just look at the result of the first frequency.