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Influence of linear profile modification and loading conditions on the dynamic tooth load and stress of high contact ratio gearsA computer simulation for the dynamic response of high-contact-ratio spur gear transmissions is presented. High contact ratio gears have the potential to produce lower dynamic tooth loads and minimum root stress but they can be sensitive to tooth profile errors. The analysis presented examines various profile modifications under realistic loading conditions. The effect of these modifications on the dynamic load (force) between mating gear teeth and the dynamic root stress is presented. Since the contact stress is dependent on the dynamic load, minimizing dynamic loads will also minimize contact stresses. It is shown that the combination of profile modification and the applied load (torque) carried by a gear system has a significant influence on gear dynamics. The ideal modification at one value of applied load will not be the best solution for a different load. High-contact-ratio gears were found to require less modification than standard low-contact-ratio gears. High-contact-ratio gears are more adversely affected by excess modification than by under modification. In addition, the optimal profile modification required to minimize the dynamic load (hence the contact stress) on a gear tooth differs from the optimal modification required to minimize the dynamic root (bending) stress. Computer simulation can help find the design tradeoffs to determine the best profile modification to satisfy the conflicting constraints of minimizing both the load and root stress in gears which must operate over a range of applied loads.
Document ID
19900013480
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lee, Chinwai
(Memphis State Univ. TN., United States)
Lin, Hsiang Hsi
(Memphis State Univ. TN., United States)
Oswald, Fred B.
(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
January 1, 1990
Subject Category
Mechanical Engineering
Report/Patent Number
AVSCOM-TM-90-C-004
E-5384
AD-A224492
NASA-TM-103136
NAS 1.15:103136
Meeting Information
Meeting: ASME Mechanism Conference
Location: Chicago, IL
Country: United States
Start Date: September 16, 1990
End Date: September 19, 1990
Accession Number
90N22796
Funding Number(s)
PROJECT: RTOP 505-63-51
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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