首页|聚脲涂覆储液圆柱壳抗爆炸荷载损伤响应实验与数值模拟

聚脲涂覆储液圆柱壳抗爆炸荷载损伤响应实验与数值模拟

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为了评估聚脲对液体输运容器的防护效能,采用实验与数值模拟相结合的方法,对聚脲涂覆储液圆柱壳结构在炸药爆炸荷载下的动力响应行为开展细致分析,获得圆柱壳的宏/微观破坏特征,揭示了爆轰产物运动及聚脲涂覆储液圆柱壳动态响应过程.结果表明,在近距离爆炸荷载作用下,薄壁储液圆柱壳以局部破坏为主,聚脲可有效提升储液圆柱壳抗爆性能;爆炸比例距离Z=0.134 m/kg1/3时,爆轰产物冲击的初始时期聚脲吸收内能相对较多,后续过程以水介质动能和铝管内能为能量转化和吸收为主.聚脲厚度从0 mm增加至6 mm,聚脲吸收能量总量显著增加,而铝管吸收能量呈现下降趋势,即聚脲可分担部分能量从而使铝管吸收能量减少以增加圆柱壳的防护能力;单位厚度聚脲吸收能量随聚脲厚度增加基本呈现递增趋势.聚脲与基材的协同变形能力是抗爆防护性能提升的主要因素.
Experiment and Numerical Simulation of Damage Response of Polyurea Coated Liquid-Filled Cylindrical Shell Subjected to Blast Load
In order to evaluate the protective effect of polyurea on liquid-filled containers,a combina-tion of experimental and numerical simulation methods was used to conduct detailed analysis of the dynam-ic response behavior of polyurea coated liquid-filled cylindrical shell structure under explosive loading.The macro/micro damage characteristics and the dynamic response process of polyurea coated liquid storage containers were obtained.The results showed that,under close-range explosion loading,thin-walled cylin-drical liquid storage shells primarily experience localized damage,and polyurea can effectively enhance the explosion resistance of these cylindrical liquid storage shells.When the stand-off distance Z is 0.134 m/kg1/3,the polyurea absorbs relatively more internal energy at the initial stage of the shock impact from explosion products,and the subsequent process mainly converts and absorbs energy from the kinetic energy of the liquid medium and the internal energy of aluminum tube.As the thickness of polyurea in-creased from 0 mm to 6 mm,the total amount of energy absorbed by polyurea significantly increased,while the energy absorbed by aluminum tubes shows a decreasing trend,indicating that polyurea can share some of the energy and reduce the energy absorbed by aluminum tubes to increase the protective capacity of the container.The energy absorption per unit thickness of polyurea shows an increasing trend with the increase of polyurea thickness.The synergistic deformation ability of polyurea and substrate is also the principal factor for improving blast protection performance.

polyurealiquid-filled cylindrical shellblast loaddamage response characteristics

陶臣、纪冲、王昕、吴港

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陆军工程大学 野战工程学院,江苏 南京 210007

聚脲 储液圆柱壳 爆炸荷载 损伤响应特性

2024

陆军工程大学学报
解放军理工大学科研部

陆军工程大学学报

影响因子:0.556
ISSN:2097-0730
年,卷(期):2024.3(6)