泡沫铝夹芯板厚度对防爆墙侵彻深度影响研究  

Study on the effect of thickness of foam aluminum sandwich panels on penetration depth of explosion-proof wall

作　　者：陈海洋 金翰呈 李雄姿 岳宝兵 李小双 肖定军[1,2] Chen Haiyang;Jin Hancheng;Li Xiongzi;Yue Baobing;Li Xiaoshuang;Xiao Dingjun(School of Environment and Resource,Southwest University of Science and Technology,Mianyang Sichuan 621010,China;Mianyang Haichuan Blasting Engineering Company Limited,Mianyang Sichuan 621010,China)

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]绵阳市海川爆破工程有限公司,四川绵阳621010

出　　处：《化工矿物与加工》2023年第10期46-55,61,共11页Industrial Minerals & Processing

基　　金：陕西省混凝土结构安全与耐久性重点实验室开放基金(SZ02201)。

摘　　要：为了确定泡沫铝夹芯板的厚度与防爆墙侵彻深度的关系,采用理论、实验和数值模拟相结合的方法对破片冲击防爆墙的过程进行了系统研究。首先,采用一级轻气炮和应变测试系统,测得破片冲击防爆墙的侵彻深度并得到破片冲击防爆墙过程中的速度衰减规律,为数值计算中本构模型、材料参数的合理选择提供了依据;其次,通过一维波动理论计算了不同材料的波阻抗,分析并得到了较为合理的材料结构形式,为数值计算的工况设计提供了依据;最后,采用数值模拟方法系统分析了破片侵彻防爆墙的过程,获得了泡沫铝夹芯板厚度对防爆墙侵彻深度的影响规律。研究结果表明:破片侵彻深度随着初始速度的增大呈先增大后减小再增大的趋势,临界速度分别为800 m/s和1500 m/s;破片侵彻深度的临界速度随着泡沫铝夹芯板厚度的增加出现“滞后”效应;单位面积吸收的能量与破片侵彻深度呈负相关,单位面积吸收的能量越多,破片的侵彻深度越小。该成果对合理设计防爆墙结构以及有效提高其对破片的防护能力具有一定的指导作用。To identify the relationship between the thickness of foam aluminum sandwich panels and the DOP(depth of penetration)of explosion-proof wall,the process in which the fragments impact the explosion-proof wall was systematically investigated by combination of theoretical analysis,performance of experiments and numerical simulation.Firstly,the DOP which the fragments penetrated the explosion-proof wall was obtained by using LGG(primary light gas gun)and stress testing system and resulted in the tendency of velocity reduction in the process of the fragments penetrating the explosion-proof wall,which provides the basis for the rational selection of constitutive models and material parameters employed in numerical simulation.Secondly the wave impedance of various materials was calculated by one-dimensional stress wave theory,rational material structure was analyzed and defined,which provides the basis for design of working conditions for numerical simulation.Finally,the process of the fragments penetrating the explosion-proof wall was systematically studied by numerical simulation,resulting in the effect of the thickness of foam aluminum sandwich panels on DOP of explosion-proof wall.The results show that the penetration depth of fragments increased initially and then dropped and then increased again with the increase of initial velocity,and the critical velocities were 800 m/s and 1500 m/s respectively.The critical velocity of fragment penetration depth exhibited a"lag"effect with the increase of the thickness of the foam aluminum sandwich panels.In addition,the energy absorption per unit area presented a negative correlation with the penetration depth of fragments,that is to say,the more energy absorbed per unit area,the smaller the penetration depth of fragments.These conclusions will play a role in guiding the reasonable structural design of explosion-proof wall and the effective improvement on its capability of protection against fragments.

关 键 词：泡沫铝夹芯板厚度 防爆墙 侵彻深度 单位面积能量耗散 破片 初始速度 

分 类 号：TU352.13[建筑科学—结构工程]