Clasification Society Rulefinder 2020 - Version 9.33 - Fix
Common Structural Rules - Common Structural Rules for Bulk Carriers and Oil Tankers, January 2019 - Part 1 General Hull Requirements - Chapter 9 Fatigue - Section 4 Simplified Stress Analysis - Symbols

Symbols

For symbols not defined in this section, refer to Ch 1, Sec 4.

(i) : Suffix which denotes dynamic load case HSM, FSM, BSR-P, BSR-S, BSP-P, BSP-S, OST-P or OST-S specified in Ch 4, Sec 2, [3.1]. ‘
  • i1’ denotes dynamic load case HSM-1, FSM-1, BSR-1P, BSR-1S, BSP-1P, BSP-1S, OST-1P or OST-1S
  • ‘i2’ denotes dynamic load case HSM-2, FSM-2, BSR-2P, BSR-2S, BSP-2P, BSP-2S, OST-2P or OST-2S.
(j) : Suffix which denotes loading condition:
  • ‘Full load’ or ‘Normal ballast’ for oil tankers, as defined in Ch 9, Sec 1, [6.2].
  • ‘Full load homogeneous’, ‘Full load alternate’, ‘Normal ballast’ or ‘Heavy ballast’ for bulk carriers, as defined in Ch 9, Sec 1, [6.3].

ℓbdg : Effective bending span of stiffener, in m, as defined in Ch 3, Sec 7.

Iy-n50 : Net vertical hull girder moment of inertia, at the longitudinal position being considered, in m4.

Iz-n50 : Net horizontal hull girder moment of inertia, at the longitudinal position being considered, in m4.

y : Transverse coordinate of the load calculation point under consideration, in m.

z : Vertical coordinate of the load calculation point under consideration, in m.

zn : Distance from the baseline to the horizontal neutral axis, in m.

fc : Correction factor as defined in Ch 9, Sec 1, [5.1.2].

fNA : Correction factor taken as:
  • For bulk carrier:
    • fNA = 1.0 for 0 < z ≤ D/2
    • fNA = 0.95 for z = D
    • fNA : linear interpolation for other values of z
  • For oil tanker: fNA = 1.0

Ka : Geometrical stress concentration factor for stress due to axial load given in [5.2].

Kb : Geometrical stress concentration factor for stress due to lateral pressure given in [5.2].

Kn : Stress concentration factor due to unsymmetrical stiffener geometry, as defined in [5.1].

Parent topic: Section 4 Simplified Stress Analysis
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