Page 56 - Shock and Vibration Overview
P. 56
Simulating Shock & Vibrations in the Laboratory
Figure 39: The useful operating regions of hydraulic and electrodynamic vibration shakers. This
plot is from the Brüel and Kjaer’s Mechanical Vibration and Shock Measurements. This
book was published in the 80s so the performance ranges have changed since then slightly; but
this data is still effective at highlighting the difference between the two types of vibration
shakers.
At Midé we use a Brüel and Kjaer electrodynamic shaker for our shock and vibration
testing, including calibration of our Slam Stick data loggers; specifically we have the LDS
V455 permanent magnet shaker shown in Figure 40. There are other companies that sell
shakers such as Data Physics, and Unholtz-Dickie. The trouble with buying these larger
general purpose shakers in your company’s lab is the typically high costs they require.
These type of industrial shakers will cost tens of thousands of dollars and that doesn’t
include the high cost of the amplifier and software to run the shaker (tens of thousands
for these too).
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