Finite Element Modeling Method for Composite Ship Hull
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摘要: 基于层合板等效刚度模型,将复合材料舰船结构中的层合板简化为正交各向异性单层板,采用三维退化单层板元建立全船有限元模型,并以调整局部刚度以及网格细化的方式准确反映局部搭接处结构的力学特征。通过对全船模态、刚度和局部应力的有限元分析计算,以及与实验结果的对比,表明所提出的复合材料舰船全船有限元分析建模方法不仅建模工作量小,而且计算精度能满足工程要求。Abstract: Based on the laminate equivalent stiffness model,the laminates of composite ship hull were simplified as orthotropic lamina,and using degenerated 3D single lamina a whole ship finite element（FE） model was established.With this model,stiffness of equivalent lamina and grid refinement was adjusted to precisely reflect mechanical properties of laps with local reinforcement.The results from the FE calculations on the modals,stiffness and local stress of whole ship under different load conditions were compared with the experimental results.It shows that using this method not only consume less working load but also can meet the requirement of engineering application.
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Keywords:
- composite ship /
- degenerated 3D finite element /
- equivalent stiffness /
- overlap region /
- FE model
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