Modal analysis (impact hammer test) ABAQUS simulation
Modal analysis (impact hammer test) ABAQUS simulation
(OP)
Hi,
Currently I am doing an experimental modal analysis (free-free boundary condition) using impact hammer. The test specimen is a mild steel plate. I have force-time graph from force transducer, acceleration-time graph from accelerometer and frequency response function (|Acceleration/Force| vs Frequency).
So now I want to do a free-free modal analysis simulation in ABAQUS. I am new to ABAQUS. So I dont know which analysis step should I use. Modal dynamics, steady-state dynamics or dynamics explicit? My main objective is to input hammer force time-history into abaqus, obtain acceleration-time graph and finally plot frequency response function (|Acceleration/Force| vs Frequency).
Is anyone has experience on this? It would be helpful if anyone has any suggestion. Thanks.
Currently I am doing an experimental modal analysis (free-free boundary condition) using impact hammer. The test specimen is a mild steel plate. I have force-time graph from force transducer, acceleration-time graph from accelerometer and frequency response function (|Acceleration/Force| vs Frequency).
So now I want to do a free-free modal analysis simulation in ABAQUS. I am new to ABAQUS. So I dont know which analysis step should I use. Modal dynamics, steady-state dynamics or dynamics explicit? My main objective is to input hammer force time-history into abaqus, obtain acceleration-time graph and finally plot frequency response function (|Acceleration/Force| vs Frequency).
Is anyone has experience on this? It would be helpful if anyone has any suggestion. Thanks.





RE: Modal analysis (impact hammer test) ABAQUS simulation
Or you use A/Explicit with *Dynamic, Explicit.
Your results will also be in time domain.
RE: Modal analysis (impact hammer test) ABAQUS simulation
If I use Modal Dynamics, with the acceleration-time graph that I obtain, how to plot frequency response function (|Acceleration/Force| vs Frequency)for all the modes in the frequency range of interest in ABAQUS? I'm gonna obtain a FRF graph like the image attached below. Anyone know how to do that?
Thanks.
RE: Modal analysis (impact hammer test) ABAQUS simulation
https://en.wikipedia.org/wiki/Fast_Fourier_transfo...