基于ASME BPVC的船舶耐内压方舱强度评估方法研究  

Strength assessment method of internal-pressure-resistant square cabin based on ASME BPVC

作　　者：张一鸣 袁昱超 唐文勇[1,2] ZHANG Yiming;YUAN Yuchao;TANG Wenyong(State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Navel Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240 [2]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《中国舰船研究》2023年第5期157-165,共9页Chinese Journal of Ship Research

基　　金：中核集团青年英才科研项目资助;中核集团领创科研项目资助。

摘　　要：[目的]针对船舶耐内压方舱结构性能评估方法尚不明确、舰船通用规范要求并不完全适用的问题,开展适用于船舶耐内压方舱结构的应力分析方法和强度评估衡准研究。[方法]基于弹性力学理论分析ASME BPVC中常用的Mises和Tresca两种屈服准则,根据安全性原则确定Tresca屈服准则为适用于船舶耐内压方舱结构的分析准则;以舱壁板架为基本单元,基于ASME BPVC对船舶耐内压方舱结构进行应力分类,得到4个典型评估位置,即板格中心、板格短边中点、板格长边中点和板格角点;为减少工程计算量,基于应力线性化理论,提出板单元有限元分析的应力分量理论公式和数值计算方法;同时建立板架实体单元有限元模型,对比两种模型下结构强度评估结果。[结果]与实体单元模型准确结果相比,板单元应力分析误差基本在3%左右且板单元结果普遍偏大,结合船、核结构安全保守性评估原则,可认为基于板单元有限元模型和ASME BPVC的船舶耐内压方舱结构强度评估方法满足工程需求。[结论]所做研究可为船舶耐内压方舱结构应力分析和强度评估提供参考,对攻克核动力装置上船面临的技术瓶颈问题具有重要意义。[Objectives]In view of the fact that the structural performance assessment method of the internalpressure-resistant square cabin is not clear and the general specifications for naval ships are not fully applicable,the stress analysis method and strength assessment criteria applicable to the internal-pressure-resistant square cabin are studied.[Methods]Based on the theory of elasticity,the two yield criteria Mises and Tresca commonly applied in ASME BPVC were analyzed.According to the principle of safety,Tresca was determined to be the analysis criterion applicable to the internal-pressure-resistant square cabin.By taking the bulkhead grillage as the basic unit,the stress classification of the internal-pressure-resistant square cabin was carried out based on ASME BPVC,and four typical assessment locations were obtained:the center of the plate panel,the midpoint of the short side of the plate panel,the midpoint of the long side of the plate panel,and the corner of the plate panel.In order to reduce the amount of engineering calculation,the theoretical formula and numerical calculation method of stress components for plate element finite element analysis were proposed based on the stress linearization theory,and the solid finite element model of grillage was established for comparing the difference between the structural assessment results of two models.[Results]Compared with the accurate results of the solid element model,the error of plate element stress analysis result is basically about 3%,and the results of plate elements are generally larger.Considering the safety conservative assessment principle of ships and nuclear structures,it can be considered that the strength assessment method of internalpressure-resistant square cabins based on the plate element finite element model and ASME BPVC meets the engineering requirements.[Conclusions]This study can provide a reference for the stress analysis and strength assessment of the internal-pressure-resistant square cabin,and is of great significance for tackling the

关 键 词：船舶耐内压方舱 ASME BPVC 屈服准则 应力分类 应力线性化 

分 类 号：U663.89[交通运输工程—船舶及航道工程]