vibration analysis

Question 1

a graphical depiction of vibration frequency

Answer 1

signature

Question 2

cause of vibration

Answer 2

forcing function

Question 3

changes vibration signature of an obect

Answer 3

stiffness

mass

Question 4

how often an event happens in a unit of time or in one cycle

Answer 4

frequency

Question 5

measurement of frequency

Answer 5

cps
cpm
HZ

Question 6

how much a machine is vibrating

Answer 6

amplitude

Question 7

the total distance a vibrating part moves either side of its natural axis

Answer 7

displacement

Question 8

the rate of change of displacement for a given time

Answer 8

velocity

Question 9

the rate of change in velocity for a given time

Answer 9

acceleration

Question 10

measurement for displacement

Answer 10

1 mil = .001 inch

1 micron = .001mm

Question 11

measurement for velocity

Answer 11

in/sec

mm/s

Question 12

measurement for acceration

Answer 12

gs

9.8m/sec squared

Question 13

frequency when a shaft is heavy and stiff

Answer 13

higher

Question 14

resonant frequency energy for forcing function is amplified within this range

Answer 14

20%

Question 15

critical speed is prevented by operating machine outside this range

Answer 15

20-30%

Question 16

a multiple or sub multiple of fundamental frequency

Answer 16

harmonic

ex = 29.77 cps to 59.54 at 2x rpm

Question 17

converts vibration signal to electrical signal

Answer 17

transducer

Question 18

vibration tool for quick measurement and precautionary measurement

Answer 18

vibration pencil

Question 19

transducer measures the relative distance between a bearing housing and a bearing housing with a proximity sensor

Answer 19

displacement transducer

Question 20

transducer for general vibration and balancing

Answer 20

velocity

Question 21

vibration frequency that is 1xrpm with stable phase

vibration radial direction

Answer 21

imbalance