NDLI: Dynamics of multistage gear transmission with effects of gearbox vibrations

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Dynamics of multistage gear transmission with effects of gearbox vibrations

Content Provider	NASA Technical Reports Server (NTRS)
Author	Choy, F. K. Zakrajsek, J. J. Townsend, Dennis P. Tu, Y. K.
Copyright Year	1990
Description	A comprehensive approach is presented in analyzing the dynamic behavior of multistage gear transmission systems with the effects of gearbox induced vibrations and mass imbalances of the rotor. The modal method, with undamped frequencies and planar mode shapes, is used to reduce the degrees of freedom of the gear system for time-transient dynamic analysis. Both the lateral and torsional vibration modes of each rotor-bearing-gear stage as well as the interstage vibrational characteristics are coupled together through localized gear mesh tooth interactions. In addition, gearbox vibrations are also coupled to the rotor-bearing-gear system dynamics through bearing support forces between the rotor and the gearbox. Transient and steady state dynamics of lateral and torsional vibrations of the geared system are examined in both time and frequency domains to develop interpretations of the overall modal dynamic characteristics under various operating conditions. A typical three-stage geared system is used as an example. Effects of mass imbalance and gearbox 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.
File Size	848417
Page Count	26
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19900018744
Archival Resource Key	ark:/13960/t1pg6kj50
Language	English
Publisher Date	1990-06-01
Access Restriction	Open
Subject Keyword	Mechanical Engineering Dynamic Characteristics Degrees of Freedom Vibration Rotors Frequencies Torsional Vibration Steady State Domains Gears Gear Teeth Vibration Mode Excitation Transmissions Machine Elements Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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