By Institution of Mechanical Engineers
This publication offers 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 features of vibration encountered in rotating equipment. special via a good mixture of commercial and educational participation accomplished, those papers current the most recent equipment of theoretical, experimental and computational rotordynamics, along the present problems with hindrance within the extra improvement of rotating machines. themes are geared toward propelling ahead the factors of excellence within the layout and operation of rotating machines. Read more...
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Extra resources for 10th International Conference on Vibrations in Rotating Machinery : 11-13 September 2012, IMechE, London
The presentation will highlight the some of the advantages model-based signal processing offers over past and presently used methods and will try to point towards a path leading from older methods and techniques towards present, stateof-the-art methods and further into the future where smart machines will have ‘eyes’ and ‘brains’. Specifically, the presentation will describe spatial, temporal and directional decomposition of rotating machine vibrations during rapid rotational accelerations. Real time signal processing methods that exploit Hilbert transform based decompositions; directional order-tracking and time-frequency maps will be demonstrated via simulations and experiments.
Often this component can be recognized only when approaching the resonant condition at a rotating speed equal to ⅓ of the rotor 1st critical speed. The 2X component is therefore the most suitable symptom for detecting position and depth of the crack; the highest values are obviously reached during a speed transient when approaching the resonant condition at ½ of the rotor 1st critical speed. 17 M(x) M(y) C Bearing #2 A B Cracked element D Bearing #1 A, B: Nodes in which two pairs of opposite 1X bending moments have been applied to the shaft C, D: Planes in which the lateral vibrations of the shaft have been measured Figure 9.
At the moment it seems that the pendulum leans heavily towards numerical modelling. Finite Element models are the basis for analysis and design, while testing and measurements provide only limited validation means for some of the model parameters partly due to poor deployment of sensors and simplistic signal processing procedures. The presentation will highlight the some of the advantages model-based signal processing offers over past and presently used methods and will try to point towards a path leading from older methods and techniques towards present, stateof-the-art methods and further into the future where smart machines will have ‘eyes’ and ‘brains’.