DESIGN CRITERIA FOR HIGH-SPEED POWER-TRANSMISSION SHAFTS
Quarterly rept. no. 1, 15 Jan-15 May 1963
BATTELLE MEMORIAL INST COLUMBUS OH
Pagination or Media Count:
Standing wave ratios for 12-inch-diameter steel shafts, 138 inches long, were calculated for the cases in which dampers were designed to minimize vibration at the 4th and 6th critical speeds. Calculations were based on an analogy relating electrical transmission lines to high-speed shafts. The calculated standing wave ratios will be compared with measured amplitudes of vibration observed in experiments using the high-speed shaft test machine. An optical device utilizing a photocell and a light source was built to measure amplitudes of vibration along the length of the shaft. A brief study of present helicopters, taking into account engine speed, power, and helicopter size, indicated that the speed range through which power transmission shafting will need to operate includes speeds up to the sixteenth critical speed. Shaft eccentricity measurements have been made on commercial shafts. These measurements will be used in digital computer calculations to predict actual shaft vibration amplitudes.
- Couplers, Fasteners and Joints
- Jet and Gas Turbine Engines