The General Problems in Vibration of Aircraft Powerplant Components

Some of the more general types of dynamic vibration that exist in aircraft, particularly the powerplant components, are reviewed for reciprocating and turbine engines as well as helicopter and unconventional drive systems. The responsiveness of various components to the source of excitation, resulting in either resonant or nonresonant (forced) vibration, is discussed. The importance of evaluating the fatigue life of a component at varying load conditions, both in the laboratory and field, is stressed.