Design optimization of composite egg-shaped submersible pressure hull for minimum buoyancy factor  

作　　者：Muhammad Imran Dongyan Shi Lili Tong Hafiz Muhammad Waqas Muqeem Uddin 

机构地区：[1]College of Mechanical and Electrical Engineering Harbin Engineering University,Harbin,150001,China [2]College of Aerospace and Civil Engineering Harbin Engineering University,Harbin,150001,China [3]Pakhtunkhwa Energy Development Organization(PEDO),Khyber Pakhtunkhwa,Pakistan

出　　处：《Defence Technology（防务技术）》2021年第6期1817-1832,共16页Defence Technology

基　　金：This work is supported by the National Natural Science Foundation of China research grant#51679056;Natural Science Foundation of Heilongjiang Province of China grant#E2016024.

摘　　要：This paper describes a design optimization study of the composite egg-shaped submersible pressure hull employing optimization and finite element analysis(FEA)tools as a first attempt to provide an optimized design of the composite egg-shaped pressure hull for manufacturing or further investigations.A total of 15 optimal designs for the composite egg-shaped pressure hull under hydrostatic pressure are obtained in terms of fibers’angles and the number of layers for 5 lay-up arrangements and 3 unidirectional(UD)composite materials.The optimization process is performed utilizing a genetic algorithm and FEA in ANSYS.The minimization of the buoyancy factor eB:FT is selected as the objective for the optimization under constraints on both material failure and buckling strength.Nonlinear buckling analysis is conducted for one optimal design considering both geometric nonlinearity and imperfections.A sensitivity study is also conducted to further investigate the influence of the design variables on the optimal design of the egg-shaped pressure hull.

关 键 词：Composite egg-shaped pressure hull Design optimization Buoyancy factor Material failure Buckling instability 

分 类 号：U674.941[交通运输工程—船舶及航道工程]