chapter  9
Mechanical Vibrations
Pages 60

Mechanical vibrations are dened as oscillations in mechanical dynamic systems and are the motions of a particle or a body or system of connected bodies that have been displaced from a position of equilibrium. The majority of vibrations are undesirable in machines or structures as they can result in increased stresses, causing increased wear such as fretting and increased bearing loads. Mechanical fatigue can also result from vibrations and rotating machine parts including aero engine parts and will need careful balancing in order to prevent any damage resulting from vibrations.