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  • MECHANICAL ENGINEERING  (2)
  • Chemistry  (1)
Collection
Keywords
Publisher
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  • 1
    Electronic Resource
    Electronic Resource
    Controls for injection molding of thermoplastics (1981)
    Hoboken, NJ : Wiley-Blackwell
    Advances in Polymer Technology 1 (1981), S. 28-47 
    Details
    ISSN: 0730-6679
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adv.1981.060010307
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    Paper (German National Licenses)
    Fulltext
  • 2
    facet.materialart.
    Unknown
    Experimental dynamic stiffness and damping of externally pressurized gas-lubricated journal bearings (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    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.
    Keywords: MECHANICAL ENGINEERING
    Type: NASA-TN-D-8270 , E-8636
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unknown
    Dynamic stiffness and damping of externally pressurized gas lubricated journal bearings (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A rigid vertical shaft was operated with known amounts of unbalance at speeds up 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 4 to 55 percent. Predicted damping was close to measured at low speeds but higher at high speeds
    Keywords: MECHANICAL ENGINEERING
    Type: ASME PAPER 76-LUB-33 , Joint Lubrication Conference; Oct 05, 1976 - Oct 07, 1976; Boston, MA
    Format: text
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    NASA TECHNICAL REPORTS
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