VIBRATORY BEHAVIOUR OF ELASTICALLY SUPPORTED TAIL SHAFTS

The knowledge of the hydrodynamic excitations and the vibratory response of the elastic systems of the steelwork supporting the tail shaft, especially when it is supported by elastic structures such as bracketless bossings, is one of the less known phenomenon. This problem, in which several unknown physical factors are involved, has an importance which will increase still further with the coming generation of the powerful and huge tonnage vessels with multi-line shaftings. This paper presents the results of experimental researches concerning shipboard measurements related to elastically supported shaftings accompanied by the results of the experimental determination of the vibratory response to artificially produced excitations which are backed by results in a model tank of measurements of the hydrodyanmic excitations caused by a special measuring device in the towing tank. The experimental researches are related to theoretical studies on the calculation of bossing elasticity and stiffness of shafting supports as well as calculations of the free vibrations of the shafting. Additionally, there are results of calculations concerning the vibratory response in forced vibrations of the concerned elastic systems and the excitations experimentally determined in the towing tank. Also presented are critical analysis of the researches carried out as well as the conclusions and recommendations which may be put forward with a view to ensuring reliable functioning of future multi-screw ships.

• Supplemental Notes:
  • 45 Conference Papers presented at IMAS 73, London, 4-8 June 1973, organized by the Institute of Marine Engineers. This paper is available only in a set of 6 papers in Subject Group 9: "Stern Gear, Shafting and Propellers" at $10.00.
• Corporate Authors:

  Institute of Marine Engineers

  Memorial Building, 76 Mark Lane
  London EC3R 7JN,   England 
• Authors:
  • Volcy, G C
  • Osouf, J
• Publication Date: 1973

Subject/Index Terms

• TRT Terms: Elastic deformation; Propeller shafts; Shafts (Machinery); Vibration
• Old TRIS Terms: Propeller shaft vibration; Shaft vibration; Tailshaft assemblies
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00048488
• Record Type: Publication
• Source Agency: Institute of Marine Engineers
• Files: TRIS
• Created Date: Nov 14 1973 12:00AM