NASA Technical Reports Server (NTRS) : Influence pdf

NASA Technical Reports Server (NTRS) : Influence

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This paper presents results of dynamic strain gage measurements performed on the NASA gear-noise rig. The experiments were part of a joint research program between NASA and the U.S. Army Research Laboratory to advance the technology of rotorcraft transmissions. Tests were performed on six sets of low contact ratio spur gears with different tooth profile modifications. Results presented include static and dynamic measurements of gear tooth strain taken over a matrix of operating conditions. The results demonstrate that a well-designed tooth profile modification can significantly reduce dynamic loads in spur gears, especially for gears which operate at high speed and under high torque. The two parabolic modifications tested were not as effective as linear modifications, possibly because the modification zone was too long

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 6/1/1995
• Year: 1995
• Book Topics/Themes: NASA Technical Reports Server (NTRS), AIRCRAFT NOISE, DESIGN ANALYSIS, DYNAMIC LOADS, GEAR TEETH, GEARS, MECHANICAL ENGINEERING, PERFORMANCE TESTS, STRAIN GAGES, TRANSMISSIONS (MACHINE ELEMENTS), HELICOPTER PROPELLER DRIVE, HIGH SPEED, NOISE MEASUREMENT, NOISE SPECTRA, ROTARY WING AIRCRAFT, STRAIN MEASUREMENT, TORQUE, Oswald, Fred B., Townsend, Dennis P

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