measuring simple shaft vibration at a bearing
January 29, 2013 4:26 PM Subscribe
i am trying to measure the vibration of a bearing, which is at one end of a simple fan shaft.
the fan is large but rotates at reasonably slow speed.
fan diameter approx 3m, shaft speed approx 145 rpm, 2 dodge s2000 bearings.
i am getting FFT data but when i look in the low frequency range the data is not meaningful.
i am using sample rate 4096 Hz, block time 0.125 sec. 20 sec sample time and i think the acceleromter is set up correctly.
where might i be falling over?
posted by edtut to science & nature (11 answers total)