Find Natural Frequency of Structure: Cube (Box) of Honeycomb Sandwich Panels

Click For Summary
SUMMARY

The discussion focuses on determining the natural frequency of a cube structure made from honeycomb sandwich panels using modal analysis in ANSYS. The user reported low natural frequencies of 0.3 Hz for the first mode and 0.5 Hz for the second mode, raising concerns about their validity. They seek guidance on practical verification methods, including Sine Sweep Testing on a shaker and impact testing using a hammer, accelerometer, signal analyzer, and data acquisition system. Additionally, they inquire about standard methods, such as ASTM guidelines, for verifying the natural frequency and the potential for mathematical modeling of the structure.

PREREQUISITES
  • Understanding of modal analysis in ANSYS
  • Knowledge of natural frequency concepts
  • Familiarity with impact testing techniques
  • Awareness of ASTM standards for structural testing
NEXT STEPS
  • Research Sine Sweep Testing methodologies for frequency verification
  • Explore impact testing procedures using hammer and accelerometer
  • Study ASTM standards relevant to natural frequency testing
  • Learn about mathematical modeling techniques for structural analysis
USEFUL FOR

Structural engineers, mechanical engineers, and researchers involved in vibration analysis and testing of composite materials, particularly those working with honeycomb sandwich panel structures.

kashoo
Messages
41
Reaction score
0
What is exact procedure to find the Natural Frequency of a structure...i.e a cube (box) of Honeycomb Sandwich Panels...i have simulated the Modal Analysis in Ansys...there i got the natural frequency of very low amount ...almost 0.3Hz for First Mode,0.5 Hz for Second Mode and so on...i think it is very less amount ...How can i Practically Verify this Natural Frequency...please guide me in this area...what about Sine Sweep Test on Shaker...Can i do it on Impact Testing(Hammer+Accelerometer+Signal Analyzer+Data Accquisition ) ?
Plz tell me some useful links on web or Standard Method ASTM for verifying Natural Frequency of Structure...
What about Mathematical Modeling of this Cubical Box.
 
Engineering news on Phys.org
Re!

No Reply till yet?
 

Similar threads

Understanding Natural Frequency and Mode Shapes in Structural Analysis
  • · Replies 1 ·
Replies
1
Views
2K
Drop Test Analysis of a Honeycomb Structure Using Ansys: ASTM Standards
  • · Replies 3 ·
Replies
3
Views
5K