基于子模型细化分析的VLCC底边舱上折角半档肘板选型

Type Selection of Upper Hopper Knuckle Bracket at 1/2 Web Frame of VLCC Based on Sub-model Fine Mesh Analysis

超大型油船VLCC都应满足国际船级社协会IACS双壳油船共同结构规范(CSR-OT)的相关要求,船体结构中的高应力区域都需按CSR规范要求进行有限元细化分析。通过实际船舶审图工作的经历,总结了使用子模型细化分析手段校核高应力区域结构强度的方法,并使用该方法分析了位于某型VLCC 1/2强框架底边舱上折角处的4种典型肘板形式,为此类无规范要求的构件提供了校核方法。最终基于有限元分析FEA细化分析结果,提出了该处肘板结构选型的优化建议。

VLCC must meet the requirements of the IACS double hull oil tanker common structural rules （CSR-OT）, hull structure in high stress regions are required by the CSR to make the fine mesh analysis. According to the actual plan approval experience, the method of checking the structure strength in high stress region with sub-model fine mesh analysis is summarized, and 4 typical types of upper hopper knuckle brackets at 1/2 web frame of VLCC are analyzed. An approval method for similar structures without requirements of the Rules is provided. Based on the results of fine mesh analysis, the optimization type selection of this bracket is put forward.