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How do you excite the rail in the lab?
*Using instrumented hammer ( excitation points are only at the top face of the rail )
Do you hit it with a hammer?
How did you determine the frequency and mode shape in the lab?
* Using a laser vibrometer (capturing the response only in the vertical direction with its software ( it can give you : time domain or frequency domain )(FFT&FRF)
When are you going to add the spikes?
* The study considers just the rail resting on the sleepers without adding any spikes.
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