As well as bearing instability and steam whirl a further cause of self-excitation is internal damping of the shaft material or due to micro-movement at shrink fits or couplings. The first was reported by Newkirk and Kimball in 1925 [14, 15, 16]. The mechanism is very complex but can be understood by the assumption of a viscous law. This will be considered in the next section.
KeywordsAnisotropy Torque Steam Assure Flange
Unable to display preview. Download preview PDF.