Frequency response of Transient Strucutral analysis
I'm conducting a transient analysis with the intent of extracting signal data which would help in identifying loose bolts in a structure. Currently I have an output of the acceleration vs time data from the resulting vibration of the system , I would prefer the acceleration vs frequency plot as an output (FRF).
Is there a way to plot this result in ansys?
Note that the excitation of the structure is due to an impulse hammer, therefore varying force with respect to time. This is why I've opted to use the transient structural analysis rather than the harmonic analysis.
The force and time data is treated as a constant input to the simulation, the variance in the simulation is from the adjustment of the bolt pretension forces.
FIg 1: Geometry and loading conditions
FIg 2: Force vs Time data for modal / impulse hammer
FIg 3: Analysis settings for first step
FIg 4: Analysis settings for second step
FIg 5: Directional Acceleration in y direction