Q235钢单层板对弹体抗撞击特性研究

为了分析外来撞击物对单层板结构的撞击特性及机理,以及结构防护特性的影响因素,利用一级气炮进行单层金属板撞击试验,同时利用理论模型对试验结果进行分析。根据试验结果分析,特别地,在理论模型中引入一个因子对靶体厚度进行修正。基于撞击试验数据,通过理论模型研究不同厚度的单层金属板对卵形,平头以及半球形头杆弹的抗侵彻特性,揭示了靶体厚度和弹体头部形状对抗侵彻性能与失效模式的影响。理论模型计算结果与试验数据进行了比较,发现二者吻合得较好。理论模型计算结果试验表明:靶体弹道极限随弹体头部曲率直径比(Caliber-radius-head,CRH)先增大后减小,最后变化趋势比较平缓。在一定的厚度范围内,靶体的弹道极限随其厚度增加而增加。     

外挂架施工技术

介绍了外挂架的特点、适用范围、施工工艺原理及其流程,结合工程实例,对高层剪力墙结构体系建筑施工时采用外挂架的操作要点进行了分析,指出该技术具有工艺简单、操作方便、造价相对较低等优点。     

Experimental Investigation on the Ballistic Resistace of Metal Plates Subjected to Impact of Rigid Projectiles

The ballistic performance of monolithic and multi-layered steel plates impacted by ogival-nosed projectiles was investigated by using a gas gun experimentally.The total thickness of in-contact multi-layered target was equally to that of monolithic target.The results show that,for the high strength targets,the monolithic targets have greater ballistic limit velocities than multi-layered targets,and also the ballistic limit velocities of targets decrease with the increase of the number of layers.However,for the low strength targets,the monolithic targets have lower ballistic limit velocities than multi-layered targets.The differences in target capacity between various impact conditions can be related to the transitions of perforation mechanisms and failure models.     

超细无机纤维棉外墙保温施工技术

简要分析了超细无机纤维棉外墙保温施工工艺原理以及工艺特点,详细阐述了该工艺的施工要点及安全环保注意事项,通过实例证明了该保温层的优势及推广价值。