Torsional vibrations are a source of considerable dynamic problems in drive units, particularly those equipped with reduction gears. For the evaluation of these vibrations, the gearing cannot be regarded as an independent unit, but must be treated together with its associated propulsion systems, drive shafts and couplings as a coherent, vibration-susceptible system. From the point of view of a manufacturer of large reduction gears, this paper deals with some special problems that have occurred and for which solutions have been devised in practice. The gear manufacturer should be prepared to clearly indicate permissible vibratory torques in dynamic load diagrams. In marine diesel propulsion units, particular care is required when misfiring of a cylinder or when malfunction of a governor is encountered. Branched systems with multi-engine input or with auxiliary outputs for generators cause additional problems. A method for measuring the dynamic load directly at the gear teeth by means of strain gauges is recommended for the determination of stress distributions in doubtful cases.

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  • Corporate Authors:

    Franckhlsche Verlagshandlung

    Pfizerstrasse 5, Postfach 640
    7000 Stuttgart 1,   Germany 
  • Authors:
    • Pinnekamp, W
  • Publication Date: 1980


  • German

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Filing Info

  • Accession Number: 00324760
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Mar 12 1981 12:00AM