Vibration testing using the Hammer impact excitation Technique

Τίτλος

Vibration testing using the Hammer impact excitation Technique

Θέμα

Vibration--Testing

Δημιουργός

Demetriou, Demetris

Πηγή

Higher Technical Institute

Το πλήρες κείμενο είναι διαθέσιμο από το Υπουργείο Ενέργειας, Εμπορίου Βιομηχανίας και Τουρισμού

Εκδότης

Library of Cyprus University of Technology

Ημερομηνία

1999

Δικαιώματα

Απαγορεύεται η δημοσίευση ή αναπαραγωγή, ηλεκτρονική ή άλλη χωρίς τη γραπτή συγκατάθεση του δημιουργού και κάτοχου των πνευματικών δικαιωμάτων

Μορφή

pdf

Γλώσσα

en

Τύπος

text

Αναγνωριστικό

MED0318

Σύνοψη

The objective of this project is a vibration test using the hammer impact excitation technique.
The vibration test component is a shaft. On the shaft I marked the points of impact. With the help of a wire and a table I hang the shaft so that the shaft was not
touching anywhere to change the vibration response.
Before starting the vibration test I spent about two weeks learning the analyzer (magnitude frequency, phase-frequency, Nyquist and Bode diagrams, frequency
response function, Fourier transform).
After I learn how to use the analyzer I start the test. I place the accelerometer on the shaft (behind the points of impact) and I start to impact the shaft with the
hammer.
I take three frequency response measurements and I examine the amplitude of the frequency response function at the number of points of shaft and the direction of vibration at each point.
Mode shapes have been developed and plotted by hand using a technique called normalization (using the amplitude of the frequency response function and the direction of the vibration.