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 5 Hull Girder Strength - Section 1 Hull Girder Yielding Strength - Symbols

Symbols

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

Msw : Permissible hogging and sagging vertical still water bending moment in intact seagoing condition, in kNm, at the hull transverse section considered, defined in Ch 4, Sec 4, [2.2.2].

Msw-p : Permissible hogging and sagging vertical still water bending moment for harbour/sheltered water operation, in kNm, at the hull transverse section considered, as defined in Ch 4, Sec 4, [2.2.3].

Msw-f : Permissible hogging and sagging vertical still water bending moment in flooded condition at sea, in kNm, at the hull transverse section considered, as defined in Ch 4, Sec 4, [2.2.4].

Mwv : Vertical wave bending moment in seagoing condition, in kNm, in intact or flooded conditions at the hull transverse section considered, defined in Ch 4, Sec 4, [3.1.1].

Mwh : Horizontal wave bending moment, in kNm, at the hull transverse section considered, defined in Ch 4, Sec 4, [3.3.1].

Qsw : Permissible positive or negative still water shear force for seagoing operation, in kN, at the hull transverse section considered, as defined in Ch 4, Sec 4, [2.3.3].

Qsw-p : Permissible positive or negative still water shear force for harbour/sheltered operation, in kN, at the hull transverse section considered, as defined in Ch 4, Sec 4, [2.3.4].

Qsw-f : Permissible positive or negative still water shear force for in flooded condition at sea, in kN, at the hull transverse section considered, as defined in Ch 4, Sec 4, [2.3.5].

Qwv : Vertical wave shear force in seagoing condition, in kN, in intact or flooded conditions at the hull transverse section considered, defined in Ch 4, Sec 4, [3.2.1].

Qsw-Lcd : Vertical still water shear force for the considered loading condition in seagoing operation, in kN, at the hull transverse section considered.

Qsw-Lcd-p : Vertical still water shear force for the considered loading condition in harbour/sheltered operation, in kN, at the hull transverse section considered.

Qsw-Lcd-f : Vertical still water shear force for the considered flooded condition in seagoing operation, in kN, at the hull transverse section considered.

x : X coordinate, in m, of the calculation point with respect to the reference coordinate system defined in Ch 1, Sec 4, [3.6].

VD : Vertical distance to the equivalent deck line, in m, as defined in [1.4.3].

z : Z coordinate, in m, of the calculation point with respect to the reference coordinate system defined in Ch 1, Sec 4, [3.6].

zn : Z coordinate, in m, of horizontal neutral axis of the hull transverse section with net scantling defined in [1.2], with respect to the reference coordinate system defined in Ch 1, Sec 4, [3.6].

Iy-n50 : Net moment of inertia, in m4, of the hull transverse section about its horizontal neutral axis, to be calculated according to [1.5].

Iz-n50 : Net moment of inertia, in m4, of the hull transverse section about its vertical neutral axis, to be calculated according to [1.5].

ZA-n50 : Net section modulus, in m3, at any point of the hull transverse section, to be calculated according [1.4.1].

ZB-n50, ZD-n50: Net section moduli, in m3, at bottom and deck, respectively, to be calculated according to [1.4.2] and [1.4.3].

zVD : Z coordinate, in m, taken equal to VD + zn.

Cw : Wave parameter defined in Ch 4, Sec 4.

ρ : Seawater density, taken equal to 1.025 t/m3.

fβ: Heading correction factor, to be taken as:
  • fβ = 1.05 for seagoing conditions.
  • fβ = 1.0 for ballast water exchange at sea, harbour/sheltered water and accidental flooded design load scenarios.

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