摘要
根据蜂窝材料压缩力学理论,提出了一种蜂窝材料的结构相似有限元模型构建方法,并在蜂窝材料轴向压缩和夹层结构抗爆炸冲击2种分析工况下对结构相似模型计算分析的等效性进行了验证。结果表明,蜂窝材料的结构相似有限元模型不仅能够描述原蜂窝材料的宏观压缩力学特性,而且可以大幅地提高模型计算效率,为蜂窝材料夹层结构的抗爆炸冲击特性分析与设计优化提供条件。基于该结构相似有限元模型,以最小化蜂窝材料夹层结构的面密度为设计目标,利用自适应响应面方法对夹层结构的主要设计参数进行了优化,在结构的爆炸冲击响应速度峰值不增大的条件下提高了结构的轻量化水平。
A structural similar finite element model of honeycomb material is proposed according to its compression mechanics, and numerical simulations are conducted to validate the equivalence of computational results of actual and structural similar models at the conditions of axial compression of honeycomb material and blast shock response of sandwich structures. The results show that the structural similar model can represent the macro-behaviours of honeycomb material and increase the computational efficiency dramatically. Hence, analysis and design optimization of honeycomb sandwich structures under blast loadings become feasible via the proposed modelling approach. Based on the structural similar modelling method, an optimization of a honeycomb sandwich structure under blast loadings is conducted for lightweight design using the adaptive response surface method, and the structural area density is reduced effectively under the given blast protection requirements.
出处
《工程力学》
EI
CSCD
北大核心
2013年第7期248-254,共7页
Engineering Mechanics
