April 06, 2006
Reliability Physics Tip
The root cause analysis investigator can be more effective in the verification of failed parts analysis by understanding differences in material failures. The analyst can benefit by knowing whether they are viewing a fatigue failure or an overload failure. The difference in how each of these could have occurred is significantly different. Fatigue occurs over time and overload happens instantaneously. The reasons or scenarios of how this can happen can be explored confidently with this knowledge.
Tip provided by the Reliability Center Inc.
http://www.reliability.com
Tel: 804-458-0645
April 06, 2006
Vibration Analysis Tip
Multi-Mode vs. Balancing Readings
Have you ever wondered why your vibration readings may be significantly different when taking the readings in Multi-mode (off-route) as compared to the same readings taken in Balancing mode?
Commonly it is thought that taking the same type of reading (displacement or velocity) throughout the same frequency range should give exactly the same result. So, why doesn’t this happen?
When taking the reading in Multi-mode, the reading incorporates the total energy throughout the frequency range.
When taking the reading in the balancing program, the reading eliminates all non-synchronous energy. Therefore, it is common for the balancing mode reading to be smaller than your multi-mode (off route) reading.
Tip provided by LUDECA, INC.
ALIGNMENT * VIBRATION * BALANCING
http://www.ludeca.com
Tel: 305-591-8935
