ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The rubbing phenomenon occurs when a rotating element eventually hits a stationary partof the rotating machinery. Increasing the rotor speed and decreasing the radial clearance between therotating and the non-rotating parts can enhance the performance of the rotating machinery. This leadsto an increased risk of rubbing contact. Rotor rubbing is the source of numerous different phenomena,for example sub- and super-harmonic vibrations, amplitude jumps and rotor instability. So thereliability analysis and sensitivity analysis of rotor system with rubbing is important for designpurposes. Reliability analysis can help the designer to establish acceptable tolerance on rotor system.Sensitivity analysis can help the designer to know which problem in rotor system with rubbing isbeing solved and how the solution may affect the design of rotor system for system correction andreanalysis. On the basis of the dynamic equations of the cracked rotor system model and withconsideration of the random parameters including shaft stiffness and damping, disk damping, radialclearance and stator radial stiffness, the random responses of cracked rotor system are researched. Thereliability and sensitivity analysis of the cracked rotor system with rubbing are studied. According tothe discretization of random process and stress-strength interference theory, the transient reliabilitymodel of cracked rotor system with rubbing is proposed. The reliability for rubbing in cracked rotorsystem is obtained by way of statistical fourth moment method, Edgeworth series technique and firstpassage theory. Numerical results are also presented and discussed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.44-46.337.pdf
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