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Determining structural performanceAn overview of the methods and concepts developed to enhance and predict structural dynamic characteristics of advanced aeropropulsion systems is presented. Aeroelasticity, vibration control, dynamic systems, and computational structural methods are four disciplines that make up the structural dynamic effort at LeRC. The aeroelasticity program develops analytical and experimental methods for minimizing flutter and forced vibration of aerospace propulsion systems. Both frequency domain and time domain methods were developed for applications on the turbofan, turbopump, and advanced turboprop. In order to improve life and performance, the vibration control program conceives, analyzes, develops, and demonstrates new methods for controlling vibrations in aerospace systems. Active and passive vibration control is accomplished with electromagnetic dampers, magnetic bearings, and piezoelectric crystals to control rotor vibrations. The dynamic systems program analyzes and verifies the dynamics of interacting systems, as well as develops concepts and methods for high-temperature dynamic seals. Work in this field involves the analysis and parametric identification of large, nonlinear, damped, stochastic systems. The computational structural methods program exploits modern computer science as an aid to the solutions of structural problems.
Document ID
19920013276
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ernst, Michael A. (NASA Lewis Research Center Cleveland, OH, United States)
Brown, Gerald (NASA Lewis Research Center Cleveland, OH, United States)
Dirusso, Eliseo (NASA Lewis Research Center Cleveland, OH, United States)
Fleming, David (NASA Lewis Research Center Cleveland, OH, United States)
Janetzke, David (NASA Lewis Research Center Cleveland, OH, United States)
Kascak, Albert (NASA Lewis Research Center Cleveland, OH, United States)
Kaza, Krishna (NASA Lewis Research Center Cleveland, OH, United States)
Kielb, Robert (NASA Lewis Research Center Cleveland, OH, United States)
Kiraly, Louis J. (NASA Lewis Research Center Cleveland, OH, United States)
Lawrence, Charles (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
February 1, 1990
Publication Information
Publication: Aeropropulsion 1987
Subject Category
Aircraft Propulsion And Power
Accession Number
92N22519
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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