STUDY ON THE FATIGUE STRENGTH OF LOCAL PARTS OF SHIP STRUCTURES. 2ND REPORT--STRENGTH SIDE FRAME END IN BULK CARRIERS

Three types of end bracketing are conventionally applied to the side frames of bulk carriers. Type A, usually applied to large ships, consists of a tapering of the frame, resulting in a gradual increase in the depth of the web at the top or bottom, and is used for built-in stiffeners. Types B and C may be used in the smaller ships, where rolled angle can be used because a smaller section modulus of the side frame is required; type B consists of brackets connected to the web of the rolled angle by overlapped welding, while in type C they are connected to the flange of the rolled angle by T-joints. The Authors give an account of model tests and stress analyses by finite-element methods, carried out to compare the strength of the three types. It was found that, in types B and C, fatigue cracks may occur at the stiffener side bracket toe and propagate readily towards the side shell; in type A, cracks may occur at the bracket end, but will not easily spread. It is recommended that the properties of the crack initation points should be improved in types B and C, since their fatigue strength is considerably less than that of type A. Order from: BSRA as No. 47,679.

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  • Corporate Authors:

    Ishikawajima-Harima Heavy Industries Co., Ltd.

    2-16, Toyosu 3 Chome, Koto-Ku
    Tokyo 135,   Japan 
  • Authors:
    • NAGANO, T
    • Yashima, H
    • Nitta, T
  • Publication Date: 1977-9

Language

  • Japanese

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00173660
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Apr 26 1978 12:00AM