Dedicated hammer impact testing
Do you use impact hammer excitation for your structural measurements? Then the BK Connect Hammer Impact Applet might be of interest. The applet is ideal for troubleshooting, quality control, or material testing scenarios using either roving or fixed hammer impact techniques.
Fig. 1: Hammer Setup: The trigger level and hysteresis are set up using a series of trial impacts (upper graph) and the effects of varying trigger settings, like predelay, are observed interactively (lower graphs). The Auto Adjust functionality automatically sets the trigger level and hysteresis.
Fig. 2: Hammer Setup: Time weighting can be set up interactively. Raw input force and acceleration response (upper graphs) are compared with weighted data (lower graphs).
Fig. 3: Hammer Measurement task showing coherence, FRF and the time signal of the response accelerometer. The average counter, signal trigger and impact validation monitors are shown as well.
Fig. 4: Resonance frequency, 3 dB bandwidth and damping ratio for the third mode. Estimates for more heavily damped modes could be obtained using a finer frequency resolution.
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