Structural Dynamics and Vibration in Practice

13

Vibration testing

Contents

13.1 Modal testing

13.2 Environmental vibration testing

13.3 Vibration fatigue testing in real time

13.4 Vibration testing equipment

References

Vibration testing in structural dynamics work can be classified into three main groups.

(1) First, in modal testing, the aim is to test a system or structure to obtain its vibration characteristics, from which its underlying equations of motion can be found. This ‘identifies the system’, leading to the alternate name of system identification. Before structural analysis had reached its present state of development, this was, in fact, the only way in which the equations of motion of complex structures, such as complete aircraft, could be determined with sufficient accuracy ...