空爆载荷作用下带孔加筋板架破坏模式研究

针对带孔加筋板架在爆炸冲击波作用下的破坏模式进行模型试验,分析带孔加筋板架的破坏模式,认为板架结构中由于前驱爆炸破片作用产生的小型穿孔对板架的抗爆能力影响不大,板架构件与板连接处变形不协调引起的弯曲应力及该部位的应力集中是导致板架破坏的主要原因。通过试验和数值计算研究比较不同穿孔尺寸对板架抗毁伤能力的影响,数值计算结果与试验结果吻合较好。

Experimental investigation On damage pattern of stiffened plate structure with hales under air blast

Model experiments are carried out to investigate the damage pattern of stiffened plate structure with holes under air blast.By analysis of the damage characteristics of the models,the main cause of model destruction is considered to be flexural stress caused by deformation incompatibility and the stress concentration at the joint of stiffeners and plates.The small holes produced by fragments play an unimportant role in damage resistance of plate structures according to the experimental results. The effect of radius of holes on damage resistance is also discussed by experimental research and numerical calculation,and the results agree well with each other.