By Institution of Mechanical Engineers
This ebook offers the papers from the tenth overseas convention on Vibrations in Rotating equipment, held in London, September 2012. because the first assembly during this sequence was once held in 1976, it has outlined and re-defined what's "state of the paintings" within the many elements of vibration encountered in all varieties of rotating equipment. A defining attribute of the convention is the combination of commercial and educational issues of the papers provided. The ensuing interactions have made it a distinct discussion board for dialogue during which the newest tools of theoretical, experimental and computational rotordynamics are uncovered along the present problems with drawback within the extra improvement of rotating machines.
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Extra info for 10th International Conference on Vibrations in Rotating Machinery: 11-13 September 2012, IMechE London, UK
However, as shown in , the length lc of the equivalent, reduced stiffness, beam element that simulates the behaviour of the cracked beam, is also depending on the relative crack depth p : lc g ( p) D (39) The function g ( p) is represented in figure 11. Anyhow, coming from the identification procedure, the equivalent bending moments M n are applied to an element with an actual length l instead of lc . It is worth noting that the nX measured displacements are the effect of the relative rotation of the cracked element extremity nodes, which is proportional to the product M n l of the identified nX bending moment component M n applied to one element of the finite element model of the rotor, multiplied by its length l .
Mechanical Systems and Signal Processing, 22, 818-844. , 2008. Some remarks on breathing mechanism, on non-linear effects and on slant and helicoidal cracks. Mechanical Systems and Signal Processing, 22, pp. 879-904. , 1998. Contact, Closure and Friction Behaviour of Rough Crack Concrete Surface. Fracture mechanics of concrete structures, Freiburg, Vol. 3, 1635-1644. , 2006. Investigation of helix-shaped and transverse crack propagation in rotor shafts based on disk shrunk technology. Nuclear Engineering and Design, 236, pp.
The study of the available literature sources providing the current state of the technology confirms the uniqueness of the developed whole engine mechanical simulator. Until now any such complex test rig for experimental investigation of blade off events hasn’t been documented. The only example comes from Peters et al. who built up a test rig for a supercritical rotor similar to a low pressure shaft of an aero engine aircraft (2). That test rig can be successful used in order to _______________________________________ © The author(s) and/or their employer(s), 2012 47 investigate the vibration behaviour of the mounted rotor, but it isn’t suitable for general investigations as described above.
10th International Conference on Vibrations in Rotating Machinery: 11-13 September 2012, IMechE London, UK by Institution of Mechanical Engineers