二次冲击加载下金属薄板的变形挠度规律研究  

Study on deformation deflection law of metal sheet under secondary impact loading

作　　者：赵伟成 翟红波[1] 毛伯永 徐其鹏[1] ZHAO Weicheng;ZHAI Hongbo;MAO Boyong;XU Qipeng(Xi’an Modern Chemistry Research Institute,Xi’an 710065,China)

机构地区：[1]西安近代化学研究所,西安710065

出　　处：《兵器装备工程学报》2024年第11期160-169,共10页Journal of Ordnance Equipment Engineering

基　　金：国家自然科学青年基金项目(12102337)。

摘　　要：为实现对关键目标的有效毁伤,在作战过程中往往会针对目标进行多次打击,金属板材作为重要的防护材料,研究其在多次爆炸冲击波作用下的变形模式与响应机制,对累积加载下目标的毁伤评估具有重要意义。本文以圆形1060纯铝薄板为研究对象,通过LS-DYNA等软件,开展了2次不同的载荷作用下靶板响应过程的仿真研究,计算了不同载荷特性加载下金属薄板的变形挠度,揭示了载荷峰值、脉宽、作用次序及加载间隔等因素对靶板变形挠度的影响规律,并通过2次加载静爆试验对仿真结果及规律进行了验证。结果表明,载荷峰值和作用次序是影响靶板变形挠度的主要因素,加载间隔小于载荷脉宽时,会对靶板变形挠度产生较大影响,超过载荷脉宽后无影响,而载荷脉宽对靶板变形挠度几乎无影响。To achieve effective damage to key targets,multiple strikes are often carried out during combat.As an important protective material,the deformation mode and response mechanism of metal sheets under multiple explosion shock waves are of great significance for the damage assessment of targets under cumulative loading.This article takes the circular 1060 pure aluminum thin plate as the research object,and conducts simulation research on the response process of the target plate under two different loads using software such as LS-DYNA.The deformation deflection of the metal thin plate under different load characteristics is calculated,and the influence of factors such as load peak,pulse width,action order,and loading interval on the deformation deflection of the target plate is revealed.The simulation results and rules are verified through secondary loading static explosion tests.The results indicate that the peak load and the order of action are the main factors affecting the deformation and deflection of the target plate.When the loading interval is less than the load pulse width,it will have a significant impact on the deformation and deflection of the target plate.When it exceeds the load pulse width,it has no effect,while the load pulse width has almost no effect on the deformation and deflection of the target plate.

关 键 词：二次加载 金属薄板 变形挠度 应变硬化 

分 类 号：O383[理学—流体力学] TJ410.6[理学—力学]