Abstract:

The thesis studies vibration of band saw blades by means of travelling wave theory of string vibration. By treating band saw blade vibration as string vibration and reconsidering the running of band saw blades, the authors obtain the calculating formula of natural frequency of running band saw blade, thus, simplifying complicated band saw blade vibration into a classical string vibration problem. With the establishment of dynamic mechanical models of band saw blades, we theoretically account for the wobbling or shaking phenomena of running band saw blades as a result of travelling wave action.

Key words: band saw blades, string vibration, dynamic frequency, travelling wave, tight sides, loose sides