Campbell diagram and is its applicaion

  • Context: Undergrad 
  • Thread starter Thread starter svishal03
  • Start date Start date
  • Tags Tags
    Diagram
Click For Summary
SUMMARY

A Campbell diagram is a graphical representation that plots the vibration characteristics of a structure against excitation frequencies, illustrating resonance occurrences. It specifically shows how the frequency of different modes varies with shaft RPM, highlighting intersection points where the rotation speed line crosses these curves. In the context of turbine wheels, the curves may not exhibit a clear pattern, complicating the diagram without providing additional insights. Understanding these diagrams is essential for analyzing vibration behavior in mechanical systems.

PREREQUISITES
  • Understanding of vibration analysis principles
  • Familiarity with shaft RPM and its impact on frequency
  • Knowledge of rotor dynamics and modes of vibration
  • Basic skills in interpreting graphical data
NEXT STEPS
  • Study the principles of resonance in mechanical systems
  • Learn about rotor dynamics and their impact on vibration characteristics
  • Explore advanced Campbell diagram applications in engine design
  • Investigate methods for analyzing intake orifice noise using Campbell diagrams
USEFUL FOR

Mechanical engineers, vibration analysts, and anyone involved in the design and analysis of rotating machinery will benefit from this discussion.

svishal03
Messages
124
Reaction score
1
Please again a fundamental question.

Can anyone explain what is a Campbell diagram and its application?

IS it a plot/comparison between exciting frequencies and natural frequencies mainly illustrating when responance will occur?

Please help and elaborate above
 
Physics news on Phys.org
Yes, I have and I understand that:

“Campbell diagram is a plot of the vibration characteristics of the structure compared with the excitation frequencies”

However, I have been reading the attached extract and was not able to interprate the diagram with respect to it. It (the attached extract) might not require any background. will be grateful if helped.
 

Attachments

The diagrams in the wiki link have curves showing how the frequency of the different modes varies with the shaft RPM, and the intersection points where the "rotation speed" line crosses the curves.

Your diagram doesn't show the curves, it just shows the intersection points with the speed line.

For a simple rotor (like the Wiki example) you can recognise the shapes of the curves as forwards and reverse whirl modes of the rotor. For a turbine wheel like your example, there isn't usually any obvious "pattern" to the curves and they can intersect each other, so plotting all the curves just makes the diagram look more complicated without adding any useful information.
 
Hi Guys,I have some doubts about how can we find number of engine cylinder with the help of campbell diagram of the intake orifice noise?
can anyone please help me
 
actullay my question is in the attached file
 

Attachments

  • campbell.png
    campbell.png
    26.1 KB · Views: 3,554

Similar threads

  • · Replies 13 ·
Replies
13
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 9 ·
Replies
9
Views
4K
  • · Replies 15 ·
Replies
15
Views
3K
  • · Replies 35 ·
2
Replies
35
Views
4K
  • · Replies 22 ·
Replies
22
Views
935
  • · Replies 11 ·
Replies
11
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 25 ·
Replies
25
Views
2K