Introduction

Abstract

The mass balancing of high-speed rotors is an integral part of the study and practice of rotordynamics. As is implied by the name, rotordynamics is concerned with the dynamics of rotating machinery. In this context, dynamics refers to harmonic motion, or vibration. Any machine with rotating components is considered to be a rotating machine. The great majority of commercial machinery falls into this category. Rotating machines range in size from small gyroscopes weighing only a few ounces to large rock tumblers weighing several tons. Other examples of rotating machines are household electric motors, internal combustion engines, gas turbine engines, steam turbines, electric generators, industrial compressors and power transmission systems, to name just a few.