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Structural Dynamics and Vibration in Practice by Douglas Thorby

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13

Vibration testing

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 ...

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