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Experimental dynamic stiffness and damping of externally pressurized gas-lubricated journal bearings
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Cunningham, R. E. Thayer, W. J. Fleming, D. P. |
| Copyright Year | 1976 |
| Description | A rigid vertical shaft was operated with known amounts of unbalance at speeds to 30,000 rpm and gas supply pressure ratios to 4.8. From measured amplitude and phase angle data, dynamic stiffness and damping coefficients of the bearings were determined. The measured stiffness was proportional to the supply pressure, while damping was little affected by supply pressure. Damping dropped rapidly as the fractional frequency whirl threshold was approached. A small-eccentricity analysis overpredicted the stiffness by 20 to 70 percent. Predicted damping was lower than measured at low speeds but higher at high speeds. |
| File Size | 1513955 |
| Page Count | 30 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19760019427 |
| Archival Resource Key | ark:/13960/t7fr4nz1r |
| Language | English |
| Publisher Date | 1976-06-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Dynamic Characteristics Damping Tests Gas Bearings Low Speed Vertical Distribution High Speed Stiffness Journal Bearings Shafts 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 | Technical Report |
