爆炸荷载作用下夹芯板的动力响应研究  

DYNAMIC RESPONSE OF SANDWICH PANELS UNDER BLAST LOADING

作　　者：王洪欣[1] 查晓雄[1] 

机构地区：[1]哈尔滨工业大学深圳研究生院土木与环境工程学科部,广东深圳518055

出　　处：《工业建筑》2011年第3期23-28,51,共7页Industrial Construction

基　　金：深圳市科技计划项目(深科信(2008)342号;(2009)202号)

摘　　要：为了得到夹芯板在爆炸荷载下的动力响应,采用试验、能量法和有限元分析方法对其进行研究。首先,介绍一种可用于夹芯板抗爆性能研究的试验系统装置及其试验结果;其次,将夹芯板的变形过程分为3个阶段,假定夹芯板通过芯材的压缩变形、面板的拉伸和弯曲消耗爆炸荷载作用到夹芯板上的能量,通过能量平衡方程得到夹芯板的变形量;最后,采用有限元程序LS-DYNA对夹芯板抗爆性能进行分析,得到夹芯板的变形过程和变形量,并将公式和有限元结果与试验结果进行比较。分析表明:当增加夹芯板面板厚度、芯材厚度以及芯材密度时,其抗冲击能力得到提高,夹芯板两端支撑的变形量大于四端支撑时变形量,简支变形量大于固支变形量。Experimental investigation,energy balance and finite element method were developed in this paper to study the dynamic response of metallic sandwich panel subjected to blast loading.First,an experimental set-up which could investigate the dynamic response of sandwich panel under blast loading was presented.Then,the deflection equation of sandwich panel was obtained which was based on an energy balance and assumed deflection field.Finally,finite elements simulations were undertaken using the LS-DYNA software,such as deformation processes of the sandwich panel.Both models were validated by comparing their predictions with the test results available in the literature.Parametric studies were then carried out to assess various factors that are influential in charactering dynamic behavior of sandwich panels subjected to blast loads.The result shows that,for the purposes of improving the impact resistance of sandwich panel can be realized by the method of increasing density of the foam core,thickness of face-sheets and foam core.

关 键 词：夹芯板 爆炸荷载 应变率效应 动力响应 有限元 

分 类 号：TU551[建筑科学—建筑技术科学]