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 3 Fatigue Evaluation - Symbols

Symbols

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

(i) : Suffix which denotes load case HSM, FSM, BSR-P, BSR-S, BSP-P, BSP-S, OST-P or OST-S specified in Ch 4, Sec 2, [3].
  • ‘i1’ denotes load case: HSM-1, FSM-1, BSR-1P, BSR-1S, BSP-1P, BSP-1S, OST-1P or OST-1S.
  • ‘i2’ denotes 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].

TC : Time in corrosive environment, in years, according to Table 5.

TD : Design life, in years, to be taken as 25 years.

TDF : Design fatigue life, in year, as defined in Ch 9, Sec 1.

TF : Fatigue life, in year, calculated according to [5].

m : Inverse slope of the design S-N curve, as given in Table 2 for in-air environment and in Table 3 for corrosive environment.
  • The inverse slope for S-N curves in-air environment changes from m to m+2 at N = 107 cycles.

nLC : Number of applicable loading conditions, as defined in Ch 9, Sec 1, [6.2] and Ch 9, Sec 1, [6.3].

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

fthick : Correction factor for plate thickness effect given in [3.3].

fmean, i(j) : Correction factor for mean stress effect given in [3.2]

Parent topic: Section 3 Fatigue Evaluation
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