TORSIONAL CHARACTERISTICS OF GEARED TURBINE SYSTEMS

Paper presents a study of the torsional vibration characteristics of various types of marine turbine propulsion units found in practice. Through the use of a digital computer program based on the Holzer-Newton methods, a comparison is made of torsional citical speeds of tuned and untuned systems. It is shown that tuned systems bear the distinct advantage of having antiresonant modes of vibration while untuned systems may have a large range of critical speed values. When dealing with partially or completely untuned systems there will always be at least one resonant mode in the operating range. It is necessary for the designer to make a more complete forced vibration analysis only at those resonant frequencies to ensure that the system is free from the damaging effects of propeller-excited torsional vibrations.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00475955
• Corporate Authors:

  Institute of Marine Engineers

  Memorial Building, 76 Mark Lane
  London EC3R 7JN,   England 
• Authors:
  • Salzman, R H
• Publication Date: 1973-3

Media Info

• Pagination: p. 27-29
• Serial:
  • Marine Engineers Review
  • ISSN: 0047-5955

Subject/Index Terms

• TRT Terms: Gears; Measurement; Torsion; Turbines; Vibration
• Old TRIS Terms: Geared turbines; Torsional vibration; Vibration measurement
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00048428
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Nov 14 1973 12:00AM