A Study on Residual Strength Assessment of Damaged Oil Tanker by Smith Method

Ahn, Hyung Joon; Ba다, Deok-Pyo; Lee, Tak Kee

Journal of Navigation and Port Research 2011;35(10):823-827.
Published online December 31, 2011.

Smith법에 의한 손상 유조선의 잔류강도 평가 연구

안형준, 백덕표, 이탁기

A Study on Residual Strength Assessment of Damaged Oil Tanker by Smith Method

Hyung Joon Ahn, Deok-Pyo Ba다, Tak Kee Lee

Abstract

The present Common Structural Rules for double hull oil tanker is not included the residual strength, which is one of the functional requirements in design part of Goal-based new ship construction standards (GBS). The GBS will be enforced after July 1, 2016. The requirement related residual strength has the goal to build safe ship even if she has the specified damages due to marine accidents including collision and grounding. In order to assess the residual strength based on risk for structural damages according to GBS, tons of nonlinear FE analysis work taking into account various types of damage will be needed. The Smith’s method, a kind of simplified method for the strength analysis is very useful for this purpose. In this paper, the residual strength assessments based on ultimate strength using Smith’s method were carried out. The objected ship is VLCC with stranding damage in bottom structures. Also, the results were compared with that of nonlinear FE analysis using three cargo hold model.

Key Words: Smith법; residual strength;Smith method;GBS;Common Structural Rules;ultimate bending moment