NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Effects of gear box vibration and mass imbalance on the dynamics of multi-stage gear transmissionsThe dynamic behavior of multistage gear transmission system, with the effects of gear-box-induced vibrations and rotor mass-imbalances is analyzed. The model method, using undamped frequencies and planar mode shapes, is used to reduce the degree-of-freedom of the system. The various rotor-bearing stages as well as lateral and torsional vibrations of each individual stage are coupled through localized gear-mesh-tooth interactions. Gear-box vibrations are coupled to the gear stage dynamics through bearing support forces. Transient and steady state dynamics of lateral and torsional vibrations of the geared system are examined in both time and frequency domain. A typical three-staged geared system is used as an example. Effects of mass-imbalance and gear box vibrations on the system dynamic behavior are presented in terms of modal excitation functions for both lateral and torsional vibrations. Operational characteristics and conclusions are drawn from the results presented.
Document ID
19910012221
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Choy, Fred K. (Akron Univ. OH., United States)
Tu, Yu K. (Akron Univ. OH., United States)
Zakrajsek, James J. (NASA Lewis Research Center Cleveland, OH, United States)
Townsend, Dennis P. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
March 1, 1991
Subject Category
Mechanical Engineering
Report/Patent Number
NAS 1.15:103695
NASA-TM-103695
E-5916
AVSCOM-TR-90-C-022
Accession Number
91N21534
Funding Number(s)
PROJECT: RTOP 505-63-51
PROJECT: DA PROJ. 1L1-62211-A-47-A
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available