Vibration analysis of a structure with cyclic symmetry

Click For Summary
SUMMARY

The discussion centers on the vibration analysis of structures with cyclic symmetry, specifically in the context of finite element (FE) analysis for turbine wheels. It highlights that the motion can be represented using complex numbers for a single segment, such as one blade of a turbine. The key question raised is whether only one segment is input into the FE solver while the output includes data for all segments, such as all blades of the turbine wheel. This fundamental inquiry seeks clarity on the relationship between input and output in cyclic symmetry analysis.

PREREQUISITES
  • Understanding of finite element analysis (FEA)
  • Familiarity with cyclic symmetry in structural dynamics
  • Knowledge of complex numbers in motion representation
  • Basic principles of vibration analysis
NEXT STEPS
  • Research the implementation of cyclic symmetry in ANSYS or ABAQUS
  • Learn about complex number applications in structural dynamics
  • Explore the output interpretation of FE analysis for cyclic structures
  • Study the effects of blade geometry on vibration characteristics in turbine design
USEFUL FOR

Structural engineers, vibration analysts, and researchers involved in the design and analysis of cyclic symmetric structures, particularly in the context of turbine wheels and similar applications.

svishal03
Messages
124
Reaction score
1
Lets us say we are doing a vibration analysis of a structure with cyclic symmetry

In very brief (as pointed out by AlephZero in one of his excellent reply) the whole motion can be represented by complex numbers which describe the motion of one segment.

Now, my question is:

1)Is it that,whilst doing the FE analysis we have just one segment (example 1 blade only- considering a turbine wheel) going into the solver - i.e. nodes/eleemnts of just 1 blade?

2)But the output comprises of all segments- i.e. all the sectors / blades?

Please help me with this fundamental question!

Sorry for being too basic
 
Physics news on Phys.org
Please can anyone help?Will be grateful
 
Please canyone help?
 

Similar threads

Cyclic Symmetry Analysis: Capturing Features
  • · Replies 1 ·
Replies
1
Views
2K
Buckling and modal FEA of a submarine structure
  • · Replies 4 ·
Replies
4
Views
3K
Can cyclic symmetry be accurately modeled in ANSYS software?
  • · Replies 4 ·
Replies
4
Views
4K
Stiffness Matrix Method: Symmetry vs Introducing a new node / joint
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Structure of Matter in Quantum Field Theory
  • · Replies 75 ·
3
Replies
75
Views
10K
Modal Analysis: Interpreting ANSYS Results
  • · Replies 11 ·
Replies
11
Views
17K
Physics Over what field I'm going to choose
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Twistors and celestial holography
  • · Replies 21 ·
Replies
21
Views
7K
Graduate "The 7 Strangest Coincidences in the Laws of Nature" (S. Hossenfelder)
  • · Replies 62 ·
3
Replies
62
Views
12K
Graduate-level analysis vs. second-year physics
  • · Replies 5 ·
Replies
5
Views
3K