ACTUAL TAIL SHAFT BEHAVIOR ON OIL FILM TAKING ACCOUNT OF PROPELLER FORCES AND MOMENTS

Research into stern-tube bearing damage and stern-gear behaviour has shown that it is no longer acceptable to ignore the static and dynamic interactions between the propeller and the tailshaft and its supports. Deformation of the stern-tube bush material and the bearing support must also be allowed for. There is a lack of knowledge on how the oil film builds up. The Authors (of Bureau Veritas) discuss theoretical studies on this oil-film build-up, together with the dynamic behaviour of the tailshaft in the stern tube, and take into account (i) distortion or bowing of the tailshaft journal under the influence of the propeller forces and moments and the alignment conditions; (ii) sloped boring-out of the white-metal bush to match the journal to the bearing surface; (iii) influence of the propeller forces and moments which cause skewed mis-alignment between the journal and the stern-tube bush; and (iv) correlation between theoretical calculations and measurements taken on a test-rig and in a VLCC. Order from BSRA as No. 54,767.

  • Supplemental Notes:
    • This paper was presented at the I. Mar. E./I.C.M.E.S. Conference, May 1979.
  • Corporate Authors:

    Bureau Veritas

    One Western Union International Plaza
    New York, NY  USA  10004
  • Authors:
    • Volcy, G C
  • Publication Date: 1980-10

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Filing Info

  • Accession Number: 00330005
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: May 21 1981 12:00AM