The reporting requirement in Chapter 3 of this publication is exempt from licensing in accordance with AFI 33-324, The Information Collections and Reports Management Program; Controlling Internal, Public, and Interagency Air Force Information Collections. Ensure that all records created as a result of...
Circumferential Excitation According to the excitation principle, two force loads are added sequentially to two adjacent zones with equal axial length of /4, where is the wavelength. The two loads have the same time duration, but with a time shift of T0/4 one after the other, where T0 is ...