… the transient data, measured during run-ups and coast-downs. The size of this … The Chapter
2 presents the fundamentals of rotor vibrations with basic … , expertise and on-site balancing. …

… weights in the balancing planes and measuring the resulting vibration responses (amplitude …
Information from unit run ups and coast downs can help to determine the required Influence …

… collected during machine’s shut-downs and run-ups. These … For instance, having properly
aligned and balanced rotors on … between start-ups and coast downs. That was a prerequisite …

… data, rotor run-ups and coast-downs and of the rubbing tests themselves. We carried out
modal tests on the rotor, … Once the rotor has been balanced, single-point rotor-casing rub with …

… A wellbalanced rotor will have lower vibration levels. To ensure reliable operation through …
in this section are typical practices for balancing motor rotors with 2 balance planes, there are …

… time-varying mesh stiffness using the harmonic balance method and the numerical simulation.
… angle of the rotor orbit major axis that occurs during run-ups and coast-downs in a large …

… analysis focuses on the rotor behaviour at the rotor speeds lower than the threshold speed
for oil whirl, associated with sub-synchronous vibration … during run-ups and coast-downs due …

… Figure 1.12: Comparison of the rotor speed as a function of wind speed using 1 second and
… as coast-downs). These control actions can either be applied automatically (eg run-ups at cut…

… rotor is rigid to avoid phenomena resulting from rotor … estimate of static gaps during run-ups
and coast-downs. In the static … Larger rotor vibrations at higher rotor speeds cause scenarios …

… Typical cases are transient conditions, eg run-ups or coast-downs of a turbine. The … use
high resolution ADC converters due to relatively large difference between the speed of the rotor …