FE Test Correlation

FE Test Correlation

Material layout optimization can be performed effectively using finite element
analysis. The results of the optimization need to be validated by measuring the vibration performance of real prototypes.

Scanning vibrometry speeds up the process of matching models to reality:

  • No mass loading — the results represent real vibrational characteristics
  • FE-like data density — modal analysis can also be performed for higher modes
  • Measurement grid is generated from the FE grid — no interpolation of data, FE coordinate system is used
  • "Virtual" measurement points — not limited by the number of physical sensors

  

FE Validation of a Gearbox

The validation of structural dynamic FE models requires experimental modal testing to extract the modal parameters and to update the FE model.

During test preparation the connection to the CAE data pool breaks up and the model´s complexity has to be reduced dramatically if contact sensors like accelerometers are used. Coordinate system and measurement point locations need manual interaction and involve sources of error like the measurement of the Euler angle etc.

A paper presented at the 2010 ANSYS Conference and 28th CADFEM Users´ Meeting shows an approach to bridge the data gap with automated 3-D scanning vibrometry.

To download the full paper, please click on tab "Technical Papers" (registration required) 

FE Validation of a Gearbox