Low noise is required in every industrial application. The end user’s comfort is as critical as the failure prevention. Vibrations produce mechanical as well as noise effect and may generate stress on parts. Stress is related with fatigue and may lead to premature failure of the device. Fatigue failure is a matter of number of cycles: even if the stress level is far lower than the maximum tensile stress of the component, failure may finally occur.
Within electro-mechanical components, vibrations are a phenomenon that has a significant impact on the performances of a product.
There are many related aspects that come into play, and here we illustrate the main ones.
- User comfort: users don’t want to experience unwanted vibrations and noise
- Components lifetime: vibrations can affect the lifetime and reliability of mechanical components
- Predictive maintenance and failure location: studying noise, vibrations and their sources within a machine can help identify its mechanical problems, even yet to arise in some cases
- Process analysis: keeping vibrations in control is very closely tied to the repeatability and reliability of the production process
In our laboratory we can do vibroacoustic test for electric motors
| Available vibroacoustic test | |
|---|---|
| Impact hammer modal testing | Used to determine resonant frequencies |
| Vibration response on the motor structure | Displacement measurement |
| Velocity measurement | |
| Acceleration measurement | |
| FFT analysis | |
| Noise emission | Sound power level measurement |
| Sound pressure level measurement | |
| Noise spectrum analysis | |
| Test correlation with CAE models | Used to adjust the parameters identified during the design stage |
