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Transient rotor dynamic rub phenomena - Theory and testThis paper develops an implicit integration scheme for transient rotor dynamic rub prediction and includes a correlation study with actual test results. A Nordsieck-like numerical integration scheme is applied directly to the second-order equations of motion. The assumption that forces and torques on the rotor are functions of the position and velocity at the point of application and its nearest neighbor is made in order to make the computational time proportional to the number of elements in the rotor dynamics model rather than the cube of the number. The test rig consists of a turbine driven, flexible shaft supported by squeeze film dampers. The blade loss event occurs due to collision of a balance bolt on one of the disks with a high speed plunger. The rotor is seen to spiral outward and contact against a stationary assemblage of seal shoes.
Document ID
19880044312
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kascak, A. F.
(NASA Lewis Research Center Cleveland, OH, United States)
Montaque, G.
(NASA Lewis Research Center Cleveland, OH, United States)
Palazzolo, A. B.
(Texas A & M University College Station, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Subject Category
Mechanical Engineering
Accession Number
88A31539
Distribution Limits
Public
Copyright
Other

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