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Equivalent models research and numerical analysis based on double curved honeycomb sandwich structure

DOI：10.7511/jslx20201210001

 作者 单位 E-mail 沈元星 大连理工大学 工业装备结构分析国家重点实验室 汽车工程学院, 大连 116024 侯文彬 大连理工大学 工业装备结构分析国家重点实验室 汽车工程学院, 大连 116024 houwb@dlut.edu.cn

蜂窝夹层结构在轻量化设计领域一直备受关注,相关的理论研究也日趋完善。然而,很多研究主要集中在平面蜂窝夹层结构上,而对于曲面结构的相关研究甚少。本文对双曲面蜂窝夹芯进行了力学分析,建立了曲面蜂窝夹层板的等效力学模型,同时建立了双曲面蜂窝夹层板详细模型和基于三明治夹层板理论以及曲面夹层板理论的等效模型,最后通过有限元方法对详细模型和等效模型在各工况下进行了分析和对比,从而验证曲面夹层板等效力学模型的准确性。结果表明,曲面夹层板等效力学模型对曲面类型蜂窝夹层结构具有更好的适用性,同时对近平面结构也有相当的适用性。

Honeycomb sandwich structures have attracted great interest in lightweight design,and improved the related theoretical research continuously.However,most of the researches are concentrated on flat honeycomb sandwich structures and few consider the curved structures.In this paper,a double-curved honeycomb sandwich core is investigated by mechanical analysis,and an equivalent mechanical model is established.Detailed models of the honeycomb sandwich structure are established.Simultaneously,the corresponding equivalent models are built based on the sandwich theory and curved sandwich theory,respectively.Finally,to verify the accuracy of the equivalent mechanical model of the curved sandwich structures,the detailed models and the equivalent models are analyzed and compared under various working conditions through the finite element method.The results show that the equivalent mechanical model of the curved sandwich plates has better applicability to curved honeycomb sandwich structures,and it also applicable to nearly plane structures considerably.