"W" is for weatherprotection. Technically, it should be IP54W but it's probably recognizable either way. NEMA MG1 and IEC 34-5 have the details of what may be required to accomplish weatherprotection but the intent is to reduce the ingress of rain, snow and airborne particles into...
Because you have an overall acceleration, the reading is taking into account all vibration in the frequency range - meaning you don't know much in the way of details. If you don't know the vibration levels at individual frequencies throughout the range, you can't convert from acceleration to...
kashyap:
There's no trigonometric way to divide one reading at 45° into horizontal and vertical components. I don't believe that there is any advantage to using only sensing in the 45° direction. More commonly, of course, people use vertical and horizontal as "standard."
regards.. kv
Does anyone have a suggestion for pump/motor shafting that will be exposed to "low temperature" (-130°C) fluid? Is there any reason to be concerned with using AISI 1045 or 4150?
Any opinion appreciated. Thanks.
Regards.. kv
Does anyone have a suggestion for pump/motor shafting that will be exposed to "low temperature" (-130°C) fluid? Is there any reason to be concerned with using AISI 1045 or 4150?
Any opinion appreciated. Thanks.
Regards.. kv
Something's not adding up. I expected the displacement and acceleration to match at the beginning of the sweep (1Hz) and velocity and acceleration to match at the end of the sweep (14Hz).
At 1Hz, 0.1 in pk-pk is equal to 0.01 G pk-pk (not G pk) and, at 14Hz, 0.45 ips pk equals 0.01 G pk (as...
Sorry for this late post but it seems to me that, while vortex shedding may excite lateral natural frequencies and the wind would provide a horizontal load, there may be some other action going on here. What about the torsional natural frequency(s) and/or acting in concert with residual...