Analysis of Hull Girder Ultimate Strength and Residual Strength Based on IACS CSR-H

Table 1

Rule comparison of hull girder ultimate strength.

	CSR-OT	CSR-BC	CSR-H
Ship length	150m or above	150m or above	150m or above
Analysis conditions	Seagoing	Seagoing, harbor, flooding	Oil Tanker: seagoing, harbor; Bulk Carrier: seagoing, harbor, flooding
Scope	Mid	Cargo and engine area	Cargo and engine area
Hogging/sagging	Sagging	Hogging & sagging	Hogging & sagging
Still water bending moment	Allowable still water bending moment; Maximum sagging bending moment of still water.	Allowable still water bending moment	Allowable still water bending moment; Maximum sagging bending moment of still water only for oil tanker.
Wave bending moment	Same as UR S11	For seagoing, Same as UR S11; For flooding, reduction as 0.8 times; For harbor, reduction as 0.4 times.	For seagoing, Same as UR S11; For flooding, reduction as 0.8 times; For harbor, reduction as 0.4 times.
Ultimate strength calculation	One step; SMITH method; Nonlinear FEM	SMITH method	SMITH method; Nonlinear FEM
Corrosion addition	0.5	0.5	0.5
γs	1.0	1.0	1.0
γw	1.2	1.2	1.2
γR	1.1	1.1	γR=γm⋅γDB; γm=1.1; For hogging,; γDB=1.25 for empty cargo hold of BC-A bulk carrier; γDB=1.1 for other cargo holds; For sagging,; γDB=1.0;