根据IACS通用结构规程设计的油轮结构的极限状态分析

Ultimate Limit State Performance of Oil Tanker Structures Designed by IACS Common Structural Rules

主要评价根据IACS通用结构规程(IACSCSR)方法设计的AFRAMAX级双层船壳油轮结构的极限状态(ULS),并与根据IACS前一版通用规范设计的同级/型油轮的结构设计对比。用这两种设计方法,计算对比了加劲板结构在甲板和船底、抵抗竖向弯曲的船体支架等部分的极限强度。采用ALPS/ULSAP程序对加劲板结构进行ULS评估,采用ALPS/HULL程序进行船体破坏分析。同时也采用了更为精细的ANSYS程序对结构进行非线性有限元分析。

The aim of the present paper is to evaluate the ultimate limit state （ULS） performance of an AFRAMAX-class hypothetical double hull oil tanker structure designed by International Association of Classification Societies Common Structural Rules （IACS CSR） method, compared with the same-class/type tanker structure designed by IACS pre-CSR method. The ultimate strengths of stiffened plate structures in deck and bottom parts, and hull girder against vertical bending moment, are computed for the two designs, and the resulting computations are compared. ALPS/ULSAP program is used for the ULS assessment of stiffened plate structures, while ALPS/HULL program is employed for the progressive hull collapse analysis. ANSYS nonlinear FEA method, which uses more refined technology of the analysis, is also employed for the same purpose. The insights and developments obtained from the present study are addressed.