中国舰船研究2023，Vol.18Issue(6)：134-142,9.DOI:10.19693/j.issn.1673-3185.03028
基于CFD-非线性有限元双向耦合的集装箱船波浪下结构崩溃数值仿真
Numerical simulation of structural collapse of container ship in waves based on two-way coupling of CFD nonlinear FEM
摘要
Abstract
[Objective]The structural response and dynamic structural collapse mode of a container ship in waves are studied by fully considering the effects of load nonlinearity and surface nonlinearity.[Methods]First,a hydrodynamic model of a container ship is established based on the CFD platform,and the overset grid method is used to realize matching between the dynamic boundary grid of the hull hydrodynamic model and the Euler grid in the far-field fluid domain.The volume of fluid method is used to simulate the nonlinearity of the free surface in the whole fluid domain,and the N-S equations in three directions are solved in the whole flow field domain so as to solve the nonlinear wave load of the ship in real time.A nonlinear finite element model of the ship that can simulate its collapse behavior is then established,and the time-domain collapse response of the ship including plasticity and buckling is calculated based on the explicit dynamic nonlinear finite element meth-od(FEM).Finally,the transmission of fluid pressure and node displacement between the hydrodynamic model and structural finite element model on the wet surface are realized,and two-way iterative coupling between the CFD solver and nonlinear finite element solver is carried out to calculate the nonlinear wave load and structur-al collapse response during the structural collapse of a 4 600 TEU container ship in real time.[Results]Un-der extreme waves,the upper to middle structures of the container ship are widely plastic,the main deck,side plate,deck longitudinal,side longitudinal and other components have typical yield instability under the action of wave loads,the deck longitudinal,side longitudinal and other structural members have serious lateral in-stability,and the hull structure loses its bearing capacity.[Conclusion]The proposed CFD nonlinear FEM can accurately solve the structural response and dynamic collapse mode,making it viable as a new approach to studying the collapse response of ship structures.关键词
结构崩溃/双向耦合/非线性有限元法/波浪载荷/数值仿真Key words
structural collapse/two-way coupling/nonlinear FEM/wave loads/numerical simulation分类
交通工程引用本文复制引用
刘维勤,张亚强,夏天禹,陆晔,杨萌,吴卫国,宋学敏..基于CFD-非线性有限元双向耦合的集装箱船波浪下结构崩溃数值仿真[J].中国舰船研究,2023,18(6):134-142,9.基金项目
国家自然科学基金资助项目(52071243) （52071243）
国防基础科研计划资助项目(JCKY2020206B037) （JCKY2020206B037）
