空中爆炸冲击载荷下折叠式夹层板塑性动力响应研究

Plastic dynamic response of folded sandwich panels under air-blast loading

在研究夹层板抗爆性能时,主要通过试验与仿真来进行评估,成本较高且耗时较长。为了降低成本以及实现舰船结构损伤变形的快速评估,进而有效指导舰船结构抗爆性能设计分析,本文针对空爆载荷作用下折叠式夹层板的变形特点将结构响应过程分为3个阶段,采用动能定理、能量守恒原理以及塑性力学的相关理论进行分析,得到了简化的理论预报公式,并通过算例将理论解析解与仿真结果进行比较。结果表明该理论预报公式具有适用性,可以为折叠式夹层板结构的抗冲击性能评估及设计提供参考。

Folded sandwich panels under impact resistance are mainly evaluated by experiments and numerical simulations,which are costly and time-consuming.To reduce cost,quickly evaluate the damage deformation of the structure,and effectively guide the design analysis of the ship structure in impact resistance,the structural response is divided into three stages according to the deformation characteristics of folded sandwich panels under air-blast loading.The analysis is performed based on the theorem of kinetic energy,the theory of energy conservation,and the theory of plastic mechanics,deriving the simplified theoretical prediction formula under air-blast loading.The applicability of the method is verified through a comparison with the calculations obtained from the finite element analysis.The findings provide a reference for the structure design and impact performance evaluation of folded sandwich panels.