Download e-book for iPad: 10th International Conference on Vibrations in Rotating by Institution of Mechanical Engineers

By Institution of Mechanical Engineers

ISBN-10: 085709453X

ISBN-13: 9780857094537

This e-book offers the papers from the tenth overseas convention on Vibrations in Rotating equipment. This convention, first held in 1976, has outlined and redefined the state of the art within the many features of vibration encountered in rotating equipment. exceptional via a good mixture of commercial and educational participation accomplished, those papers current the newest equipment of theoretical, experimental and Read more...

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Additional resources for 10th International Conference on Vibrations in Rotating Machinery : 11-13 September 2012, IMechE, London

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A relevant part of this depth is due to the notch used to let the crack starting the propagation, but form the consideration of figure 12, there is no remarkable difference between slot and 2X f ( p)  g ( p) curves for small crack depth. 6 % Figure 13. Crack depth identification in a test rig (left); crack shape and depth after shaft breaking. 5 CONCLUSIONS The presence of cracks in rotors is one of the most analyzed topics in rotordynamics, due to the serious damages that may happen if this fault is not early detected.

In order to enhance the detectability of asymmetry, despite the fact that the systems have zero unbalance, an externally applied torque of the form Q e  Qe sin t e1  Qe cos t e3 unbalance is applied. Figure 14. Left: Asymmetric disc mounted on a flexible massless shaft; Right: Anisotpric, massless shaft with a symmetric disc at its middle The two systems can be modelled by a linear time invariant equation of motion (LTI EoM) in terms of the disc angular deflections around e1 , e2 . (26)), the steady state response in inertial CS is characterized by two frequencies.

____________________ © Izhak Bucher, 2012 25 1 INTRODUCTION Rotating machines exhibit complex vibration patterns combining several response components having different time and speed-dependent frequencies [1-4]. Some of these components overlap in the frequency domain despite representing different kinematic and physical features. The rich dynamics of rotating machines makes it difficult to isolate particular vibratory modes from typical measured signals. It turns out that rotating structures have some unique features that can be exploited to isolate otherwise hidden signal-components when suitable model-based signal processing methods are employed.

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10th International Conference on Vibrations in Rotating Machinery : 11-13 September 2012, IMechE, London by Institution of Mechanical Engineers

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