CAJ | 학술논문

针对混杂夹芯复合结构的典型结构和承载受力特征,以某水下平台附体结构为背景展开研究.首先,设计试验模型并进行耐压承载特性试验.然后,用Abaqus建立有限元分析模型,将仿真计算与试验结果进行对比,验证仿真分析的有效性,并在此基础上进一步探讨深水静压载荷作用下该结构各主要组成构件的变形及应力分布特征规律.最后,以钢质框架与表层蒙皮相交应力集中区域的细节设计问题为对象,综合评价了2种T型连接设计方案的合理性与可行性.结果显示,芯材弹性模量在4~8 GPa时可以避免蒙皮和芯材出现严重的应力集中,可为该类结构的后续工程设计提供参考.
침대혼잡협심복합결구적전형결구화승재수력특정,이모수하평태부체결구위배경전개연구.수선,설계시험모형병진행내압승재특성시험.연후,용Abaqus건립유한원분석모형,장방진계산여시험결과진행대비,험증방진분석적유효성,병재차기출상진일보탐토심수정압재하작용하해결구각주요조성구건적변형급응력분포특정규률.최후,이강질광가여표층몽피상교응력집중구역적세절설계문제위대상,종합평개료2충T형련접설계방안적합이성여가행성.결과현시,심재탄성모량재4~8 GPa시가이피면몽피화심재출현엄중적응력집중,가위해류결구적후속공정설계제공삼고.
According to the typical structure of hybrid sandwich composite structures and the correspond-ing bearing force characteristics, this paper takes a certain submerged platform appendage structure as the research target. First, a model test scheme is designed, and the experimental study on compression load-bearing characteristics is carried out. Then, the Abaqus finite element model is established, whose va-lidity is verified through comparative analysis with the experimental data. On this basis, further discussion about the deformation and strength characteristics of the main component of hybrid sandwich composite structures under static pressure in deep water environment is put forward. Finally, considering the design problem of the stress concentration area between steel frame and surface skin, the rationality and feasibility of the comprehensive evaluation of two types of T connection design are estimated. The results show that serious stress concentration of the skin and the core material could be avoided when the elastic modulus of the core material is between 4~8 GPa, which serves as valuable reference for future engineering design.