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 4 Loads - Section 2 Dynamic Load Cases - Symbols

Symbols

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

asurge, apitch-x, asway, aroll-y, aheave, aroll-z, apitch-z : Acceleration components, as defined in Ch 4, Sec 3.

fxL : Ratio between X-coordinate of the load point and L, to be taken as:
  • , but not to be taken less than 0.0 or greater than 1.0.

fT : Ratio between draught at a loading condition and scantling draught, as defined in Ch 4, Sec 3.

flp : Factor depending on longitudinal position along the ship, to be taken as:
  • flp = 1.0 for x/L ≤ 0.5
  • flp = -1.0 for 0.5 < x/L
flp-OST : Factor for the longitudinal distribution of the torsional moment for the OST load case, to be taken as:
  • flp-OST = 5 fxL for x/L < 0.2
  • flp-OST = 1.0 for 0.2 ≤ x/L < 0.4
  • flp-OST = -7.6 fxL + 4.04 for 0.4 ≤ x/L < 0.65
  • flp-OST = -0.9 for 0.65 ≤ x/L < 0.85
  • flp-OST = 6 fxL - 6 for 0.85 ≤ x/L
flp-OSA : Factor for the longitudinal distribution of the torsional moment for the OSA load case, to be taken as:
  • flp-OSA = -(0.2 + 0.3 fT) for x/L < 0.4
  • flp-OSA = -(0.2 + 0.3 fT)(5.6 – 11.5 fxL) for 0.4 ≤ x/L < 0.6
  • flp-OSA = 1.3(0.2 + 0.3 fT) for 0.6 ≤ x/L

WS : Weather side, side of the ship exposed to the incoming waves.

LS : Lee side, sheltered side of the ship away from the incoming waves.

MWV : Vertical wave bending moment, in kNm, defined in Ch 4, Sec 4.

QWV : Vertical wave shear force, in kN, defined in Ch 4, Sec 4.

MWH : Horizontal wave bending moment, in kNm, defined in Ch 4, Sec 4.

MWT : Torsional wave bending moment, in kNm, defined in Ch 4, Sec 4.

CWV : Load combination factor to be applied to the vertical wave bending moment.

CQW : Load combination factor to be applied to the vertical wave shear force.

CWH : Load combination factor to be applied to the horizontal wave bending moment.

CWT : Load combination factor to be applied to the wave torsional moment.

CXS : Load combination factor to be applied to the surge acceleration.

CXP : Load combination factor to be applied to the longitudinal acceleration due to pitch.

CXG : Load combination factor to be applied to the longitudinal acceleration due to pitch motion.

CYS : Load combination factor to be applied to the sway acceleration.

CYR : Load combination factor to be applied to the transverse acceleration due to roll.

CYG : Load combination factor to be applied to the transverse acceleration due to roll motion.

CZH : Load combination factor to be applied to the heave acceleration.

CZR : Load combination factor to be applied to the vertical acceleration due to roll.

CZP : Load combination factor to be applied to the vertical acceleration due to pitch.

θ : Roll angle, in deg, as defined in Ch 4, Sec 3, [2.1.1].

ϕ : Pitch angle, in deg, as defined in Ch 4, Sec 3, [2.1.2].

Parent topic: Section 2 Dynamic Load Cases
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