Hi
An eigenfrequency analysis is taking a model, stripping external forces/loads, linearising the model and searching for the eigenmodes of the equation sets
A frequency response is obtained by applying a sinus excitation, giving an amplitude, a phase and then scanning the frequency. If you load is applied such to excite the fundamental modes you should get a peak for your previously calculated eigenfrequencies (I always use an eigenfrequency analysis to define my frequency scan values). But if your load is oriented in another direction you might get couplings and excite other "higher order" modes
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Good luck
Ivar
An eigenfrequency analysis is taking a model, stripping external forces/loads, linearising the model and searching for the eigenmodes of the equation sets
A frequency response is obtained by applying a sinus excitation, giving an amplitude, a phase and then scanning the frequency. If you load is applied such to excite the fundamental modes you should get a peak for your previously calculated eigenfrequencies (I always use an eigenfrequency analysis to define my frequency scan values). But if your load is oriented in another direction you might get couplings and excite other "higher order" modes
--
Good luck
Ivar