Download 10th International Conference on Vibrations in Rotating by Institution of Mechanical Engineers PDF

By Institution of Mechanical Engineers

This publication provides the papers from the tenth overseas convention on Vibrations in Rotating equipment. This convention, first held in 1976, has outlined and redefined the cutting-edge within the many facets of vibration encountered in rotating equipment. special through an outstanding mixture of business and educational participation accomplished, those papers current the most recent 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

Example text

Robust estimate of excitations in mechanical systems using M-estimators – Theoretical background. Journal of Sound and Vibration, 310(4-5), 923-946. , 2006. A model-based identification method of transverse cracks in rotating shafts suitable for industrial machines. Mechanical Systems and Signal Processing, 20(8), 2112-2147. 2000. Identification of Transverse Crack Position and Depth in Rotor Systems. Meccanica, International Journal of the Italian Association of Theoretical and Applied Mechanics, 35(6), 563-582.

8), (9) and (10) except the first one, we obtain: Ffn    K n  xs (31) This assumption is reasonable if heavy, horizontal axis, industrial rotating machineries are considered, since the static deflection, in the shaft sections loaded by consistent bending moments, is much higher than the vibrations, especially when operating conditions far from resonances in critical speeds are analyzed. e. M 2  M 2  M 2 and  2   2 , and the equivalent force system is a rotating moment of amplitude M 2 .

Since in the crack, as in the Bernoulli’s beam, the shear force can be neglected with respect to bending moment flexibility, x s j is composed mainly by rotational deflections of the extremity nodes. Therefore x s j can be calculated by considering the statical bending moments due to static, fixed in space, force vector W acting on the cracked element. These bending moments do not change much from node to node of a element, for a suitably refined mesh of the rotor, and can therefore be considered constant in the cracked element and equal to M .

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